Danfoss 148R9653 Intelligent Purging System User Guide

Regularly inspect and clean the system components as per the maintenance schedule outlined in the user manual.
Keep the system free from dust and debris to ensure efficient operation.

FAQ

Q: What should I do if the system displays an error code?
- A: Refer to the troubleshooting section of the user manual to identify the error and follow the recommended steps to resolve it.

Q: Can I use the IPS 8 for other refrigerants besides Ammonia?
- A: No, the IPS 8 is specifically designed for Ammonia use only.
- Do not use it with other refrigerants.

Legal notice

This product information is a part of the documentation for the Danfoss scope of delivery and serves as product presentation and customer advisory service. It contains important information and technical data regarding the product.

This product information should be supplemented with information about the industrial safety and health-related regulations at the site of installation of the product.
The regulations vary from place to place as a result of the statutory regulations applicable at the site of installation and are therefore not considered in this product information.

In addition to this product information and the accident prevention regulations applicable for the respective country and area where the product is used, the technical regulations for safe and professional work must also be observed.
This product information has been written in good faith. However, Danfoss cannot be held responsible for any errors that this document may contain or for their consequences.

Danfoss reserves the right to make technical changes during further development of the equipment covered by this product information.
Illustrations and drawings in this product information are simplified representations.

As a result of the improvements and changes, it is possible that the illustrations do not exactly match the current development status.
The technical data and dimensions are subject to change. No claims will be accepted based on them.

EU DECLARATION OF CONFORMITY

Danfoss A/S

Refrigeration & Air Conditioning Controls declare under our sole responsibility that the Product category: Intelligent Purger System (Air Purger)
Type designation(s): IPS 8
Covered by this declaration conforms with the following directive(s), standard(s) or other normative document(s), provided that the product is used following our instructions.

Machine Directive 2006/42/EC

EN 378-2:2016 Refrigerating systems and heat pumps – Safety and environmental requirements – Part 2: Design, construction, testing, marking and documentation
IEC 60204-1:2018 Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 1 General requirements

Pressure Equipment Directive 2014/68/EU (PED)

EN 378-2:2016 Refrigerating systems and heat pumps – Safety and environmental requirements – Part 2: Design, construction, testing, marking and documentation
Ammonia side (R717): Category A4P3. Fluid group: 1. PS = 40 bar. TS: -40 C to 60 C
R452A side: Category 1. Fluid group: 2. PS = 28 bar. TS: -40 C to 60 C
Ambient temperature: -10 C to 43 C

Electromagnetic Compatibility Directive 2014/30/EU (EMC)

IEC 61000-6-2 Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity standard for industrial environments (IEC77/488/CDV:2015)

EN 61000-6-4 Electromagnetic compatibility (EMC) – Part 6-4: Generic standards – Emission standard for industrial environments
Note: EMC test performed with cable length < 30m.

Date: YYYY.MM.DD

Place of issue:

Issued by

Date: YYYY.MM.DD Place of issue:

Approved by

Signature:

Name: Su Cheong Ho

Title: Lead Design Engineer

Signature:

Name: Behzad Parastar Title: Product Manager

Danfoss only vouches for the correctness of the English version of this declaration.

In the event of the declaration being translated into any other language, the translator concerned shall be liable for the correctness of the translation.
ID No: 084R9456
This doc. is managed by 500B0577

Revision No: AA

Technical data

Supply voltage for: IPS 8 Field1) connected solenoid coils	230 V +/-10% AC, 1ph, 60Hz
Current	5.7 A (max. 6.5 A)
Power consumption	max. 1.3 kW
Short-circuit current rating	Icc 10kA
Temperature range ambient	-10 °C to +43 °C (14 °F to 109 °F)
Temperature range transport/storage	-30 °C to +60 °C (-22 °F to 140 °F)
Enclosure	IP55
Weight	max. 100 kg (221 lbs)
Dimensions (LxWxH)	1051 x 441 x 703 mm (41.4 x 17.4 x 27.7 inches)
Purger refrigerant	R452A 900 gram (31.7 oz)
Max. operating pressure (PS) R452A	28 bar (406 psi)
System refrigerant	R717
Max. operating pressure R717	40 bar (580 psi)
Operating temperature R717	-40 °C to +60 °C (-40 °F to 140 °F)

Description Field-connected valves

Digital Output, DO6 YV ICFD – Valve on ICF (Optional)

Digital Output, DO7 Y1 Valve – Purge Point 1
Digital Output, DO8 Y2 Valve – Purge Point 2
Digital Output, DO9 Y3 Valve – Purge Point 3

Digital Output, DO10 Y4 Valve – Purge Point 4
Digital Output, DO11 Y5 Valve – Purge Point 5
Digital Output, DO12 Y6 Valve – Purge Point 6

Digital Output, DO13 Y7 Valve – Purge Point 7
Digital Output, DO14 Y8 Valve – Purge Point 8
Digital Output, DO15 Y9 Valve – Bubbler (Optional) / General Alarm (Optional)

Ordering

Unit	Code number
Danfoss Intelligent Purging System IPS 8-unit	084H5002

Accessories/Spare parts	Accessory (Not included with IPS)	Spare parts for service (Built-into IPS)	Code
Flange blind blank incl Bolts, nuts, and Gaskets*	x		084H5053
Bubbler for IPS			084H5070
SV3 Float Valve	x		027B2023
ICF 15-4 solenoid, DIN Butt weld 15mm ½ inch	x		027L4543
ICF 15-4 solenoid, ANSI Socket weld 15mm ½ inch	x		027L4538
ICF 15-4 solenoid, ANSI Butt weld 15mm ½ inch	x		027L4602
Welding Flange incl Bolts, nuts, and Gaskets		x	084H5061
Repair kit for Main Purge Valve (Armature, tube, Sealing, Orifice, Filter insert). See Fig. 1, Item 16	x	x	084H5051
Solenoid coil, 24V DC for Main Purge Valve. See Fig. 1, Item 16	x	x	018F6757
PSU, 24V DC – optional for powering purge points	x	x	080Z0055
Restrictor, in purge line after Main Purge Valve. See Fig. 1, Item 18, and Fig. 13.		x	084H5054
Compressor Cranck case heater		x	084H5058
Condenser coil assy incl screws		x	084H5059
Fan motor for condenser Incl fan grid and screws		x	084H5060
Extraction Fan		x	084H5056
Air grid with filter (2 pieces)		x	084H5057
Pre-programmed MCX15B2 with application SW included		x	084H5067
Pressure transmitter evaporator, soldered (AKS 32R)		x	060G3552
Compressor including Start relay box and Start and Run Capacitor		x	123B2156
Compressor Hi-temp sensor		x	084N2003
Expansion valve, R452A		x	068U3881
Sight glass		x	014-0191
Pressure transmitter – R717, Threaded, AKS2050		x	060G5750
Thermostat for crankcase heater control		x	060L111166
Temperature sensor – R717, AKS 21M		x	084N2003
LLS 4000 liquid level switch G 3/4” **		x	084H6001
Pressure switch for Fan		x	Contact Danfoss
Pressure safety switch		x	Contact Danfoss

For closing system flange during system pressure testing
See Fig. 1 and Fig. 10a

Introduction

The Danfoss Intelligent Purging System (IPS 8) is a stand-alone, self-contained purging unit designed to remove non-condensable gases (NC gases = air and other unwanted foreign gases) from industrial ammonia refrigeration systems.

The IPS control can handle up to 8 purge points automatically.
The ingress of NC gases into a refrigeration system is inevitable, regardless of the refrigerant, pressures, or temperatures.
NC gases in the system will result in a decrease in the system efficiency, both in terms of an increase in power consumption and reduced cooling capacity.

Due to having a different density than ammonia, the ingressed air will accumulate in specific areas of the system, where it can be removed using the Danfoss IPS 8.
The accumulation areas are identified in the Connection locations section, along with recommended connection principles.
The purger unit is an electronically controlled, self-contained R452A refrigerant system that runs independently of the main ammonia system and with only one flange connection to the ammonia plant.

The flanged opening allows the ammonia gas/NC gas mix access to the purger’s heat exchanger, where it is split into ammonia condensate and NC gases.
The ammonia condensate is returned by gravity to the main plant, while the NC gases are purged to the atmosphere through e.g. a water bath.
Through the flanged opening, the purger unit has access to the parameters from the ammonia plant required for full electronic control.

The unit runs automatically in 24-hour cycles, checking for the presence of NC gases and, if present, removing the NC gases.
To regain and retain the design capacity of the main ammonia system and prevent future air accumulation, it is highly recommended to install the Danfoss IPS 8.

Features

State-of-the-art electronically controlled unit based on the Danfoss MCX controller platform

Reduced power consumption of the ammonia plant
Automatic purging response to NC gases in the refrigeration system
Continuous and smart monitoring of differential pressure between the system refrigerant and the purger’s refrigerant

Smart purging that minimizes refrigerant (ammonia) release to the environment
Self-contained unit operation, which functions independently from the main plant
An operation log for easy purging cycle data monitoring

Industry-standard Modbus RTU communication for remote monitoring and system integration
Reduced purging unit power consumption compared to other units due to on-demand operation only
Load scheme to identify which purge point is removing most NCC

Prepared to manage/control Bubbler
Option to install LLS 4000 to protect IPS for a high column of ammonia liquid
Self-diagnostics for both unit and system operation to shut down in the event of malfunctions

Cost-effective installation with few mechanical and electrical connections
A fully brazed and leak-tested R452A cooling system, minimizing leakage risks
A plug-and-play stand-alone design, which simplifies installation and commissioning while reducing potential errors

No need for advanced settings
A compact and easy-to-handle design
IPS carries a registered patent

With our solution of IPS 8 Air Purger combined with the Bubbler, we can help customers keep machine rooms free of ammonia smelling, while IPS 8 removes the non-condensable gases, and purges the Bubbler.

Working principle

The Danfoss IPS 8 is factory-tested and ready to use in ammonia plants with a condenser pressure of more than 6,5 bar (94 psi). The purger is charged with 900 grams (31.7 oz) of R452A.
Only 1 mechanical connection is needed for the purger (see fig. 1).

The flow of ammonia/NC gases from the main plant is done through the flange for ammonia (see 13 in Fig. 1 below), while the NC gas purge is done through the blow-off pipe after the purge restrictor (18).
Through the flange for ammonia (13), a mixture of ammonia gas and NC gases enters the heat exchanger (12) part of the purger.
The ammonia gas/NC gas mix is cooled down below the condensing temperature of the ammonia by the R452A circuit.

At this point, ammonia gas condenses and returns by gravity to the ammonia plant whereas the NC gases accumulate in the heat exchanger (12) for subsequent purging.
By condensing the ammonia gas, a new ammonia/NC gas mix is naturally pulled through. This new mix is separated through a continuous process.
As the NC gas concentration in the heat exchanger (12) increases, the R452A heat exchanger pressure and temperature will simultaneously decrease.

The controller continuously monitors the R452A heat exchanger pressure as well as ammonia pressure and temperature. When the R452A pressure reaches a predefined pressure difference when compared with the ammonia pressure (temperature) it prepares to purge the NC gases through the solenoid valve (16). The blow-off is activated by the solenoid (16) and through appropriate piping/hosing, should be led into a water bath.
This process is recommended to retain small amounts of ammonia (see Installation section).

1	Compressor (900 gram (31.7 oz) R452A) controlled via Digital Output, DO1	11	Expansion valve, R452A
1a	Compressor Cranck case heater	12	Heat exchanger Ammonia/R452A
2	Thermostat for crankcase heater control	13	Welding Flange
3	Discharge temp sensor R452A via Analog Input AI3, Pt 1000	14	Pressure transmitter R452A. Measured via via Analog Input AI1, Pressure transmitter, AKS 32R
3a	Suction temperature sensor R452A via Analog Input AI4, Pt 1000	15	Pressure transmitter R717. Measured via Analog Input, AI2, Pressure transmitter, AKS 2050
4	Pressure safety switch	16	Main Purge Valve controlled via Digital Output, DO2
5	Condenser	17	NC temperature sensor R717. Measured via Analog Input, AI5, Pt1000
6	Extraction fan	18	Restrictor, purge line
7	Pressure switch for Condenser Fan	19	LLS 4000 Liquid Level Switch. Accessory. Not included with standard IPS
8	Receiver
9	Filter
10	Sight glass

Working cycle

The Danfoss IPS 8 operates in 24-hour cycles, of which 45 minutes are dedicated to an R452A pull-down. At power on, the pull-down is initiated immediately. If no NC gases are detected during the 40-minute pull-down, the system will close the solenoid valve at purge point 1 and open the solenoid valve at point 2. After a cycle time of 24 hours/N (Number of purge points), the compressor will pull down again condensing the ammonia. After 24 hours, all purge points have been vented one time.

To identify NC gases, the controller utilizes upper and lower thresholds for R452A evaporating temperature. If, during pull down, the temperature continues decreasing and the lower threshold is passed, the controller considers this to be a high concentration of NC gases and opens the purge solenoid valve. The purge valve will stay open until sufficient condensing ammonia is present to lift the R452A evaporating temperature above the upper threshold.
The compressor will continue running and if the temperature again decreases below the lower threshold, a new purge will be performed.
This process will be repeated until the R452A heat exchanger temperature stays above the lower threshold for >40 minutes following the previous closure of the purge valve.

Label ID	Parameter Name	Description and selection options	Factory setting
CM3	PDT	Pull down time of the compressor	40 min
CM4	CST	Compressor start time See Fig. 2 for details	1440 min (24 h)
VA5	PLT	Endless purging max time for endless purging on one point. When the time has expired, IPS will go to the next Purge Point (PP)	24 h

See complete Parameter List – Table 01

Fig. 2 – Power on & Cycle at no NC gases present: CST (compressor start time) and PDT (pull down time) are configurable
Cycle (CST) = 24 hours/N (number of purge points)

Fig. 3 – Purging procedure – Low R452A evap. temperature detected during PDT: Thresholds are configurable
If a low evaporator temperature is detected (passing a lower threshold), the purging procedure will be repeated immediately

Air traps

For systems with low-pressure liquid level control, the correct condenser/ receiver installation is shown in Fig. 4 and Fig. 5.
The discharge gas from the compressor (1) is led to the condenser (2) where it is condensed. The receiver (3) holds the liquid until there is a demand for liquid from the LP side, e.g., until the expansion valve (4) opens. If the expansion valve is closed, the liquid condensed in the condenser will need to be stored in the receiver and the level will increase. To ensure a free ˝ow to the receiver, the gas must be allowed to leave the receiver; this process is accomplished through the pressure equalizing line (a).
The pressure equalizing line makes the pressure in the receiver the same as in the compressor discharge line. The pressure in the condenser outlet is lower due to the pressure loss in the condenser.

Since the condenser outlet pressure is lower than in the receiver, it is therefore necessary to mount the condenser higher than the receiver and allow for a higher liquid level in the piping between the condenser and the receiver (b).
The liquid column in line (b) compensates for the pressure difference between the condenser outlet and the receiver.
Fig. 4 shows the liquid connection at the bottom of the receiver.

If the liquid from the condenser is connected to the top of the receiver (Fig. 5), a slightly different arrangement must be made.
The liquid line (b) from the condenser to the receiver will need to have a gooseneck/liquid trap to ensure that the liquid column is established.
As air is heavier than ammonia gas, the air will collect in two locations in this type of installation: On top of the liquid in the receiver (x) and/or on top of the liquid in the drop leg from the condenser (y).

Connection locations

Air purger installation in a low-pressure level controlled installation

The correct locations for the air purger to be connected to the ammonia plant are: (See Fig. 6 and Fig. 7)
on top of the receiver or

on top of the liquid in the drop leg from the condenser.
The air purger (5) is connected to the two purge points through solenoid valves (px and py). Note that only one solenoid should be open at any given time, otherwise the liquid column in the condenser will be short-circuited.
The air purger must have its own liquid return drop leg (c) connected in parallel with the condenser’s drop legs (b).

When the purger is connected to the receiver i.e. solenoid (px) open, the liquid level in the air purger drop leg (c) will be equal to the receiver liquid level (3);
When the purger is connected to the condenser outlet i.e. solenoid (py) open, the liquid level will be equal to the liquid level in the condenser drop leg (b).
Alternatively, the air purger draining of liquid can be achieved effectively through an HP ˝oat valve (6) to the low pressure side (see Fig. 7).

For systems with a high-pressure liquid level control, the air will collect in the ˝oat valve (3). (See Fig. 8).
The compressor (1) supplies high-pressure gas to the condenser (2), where it is condensed.
The ˝oat valve (3) will ˝ash any liquid back to the LP side. The air purger (5) must be connected to the ˝oat valve through a solenoid valve (pv).

The ammonia liquid condensed in the air purger must be drained through drain pipe (c) to the LP side via a ˝oat valve (6).

General

The air purger must always be mounted above the highest liquid level to be able to drain the ammonia condensed in it. Otherwise, the air purger can ˝ood and potentially purge ammonia liquid.

The purger liquid return leg (c) must always be mounted vertically or at minimum, with a downward slope.
The solenoid valves at the connection points must never be activated at the same time. Finalize purging at one location before switching to the next.

WARNING: Cod. 99000572

Follow the installation guide strictly during Purger installation. Install the Purger unit in a location where the bottom flange level and any gas inlet connection level are above any possible ammonia liquid level.
Liquid drain piping from the purger must always have a downward slope.
Install a shut-off valve close to the bottom flange entrance to enable the removal of the unit and closing for high-pressure ammonia gas.

Connect proper resistant piping to the purging outlet pipe and ensure the purged non-condensates are discharged into a water bath of max. 200 liter.

Connection points

Multi-point purging

As factory default, the Danfoss IPS 8 is conÿgured to manage up to 8 purge points. (Multi-point purging. See Fig. 10).

The actual amount of purge points connected needs to be set up in the MCX controller after power-up.
The parameter in question for entering the actual number of purge points: is V10, Max_PP (See Table 3).
Single point purging setup is possible (See Fig. 09 -no purge solenoid valves).

For single-point purging the parameter in question for entering the actual number of purge points: V10, Max_PP must be set to 1 (See Table 3).
Both power and control wiring of the installed solenoid valve coils should take place before the First power-up.
NEVER HAVE MORE THAN 1 PURGE POINT OPEN AT A TIME. Always close one purge valve before opening the next.
This is done by turning the purger unit power on and entering the number of actual purge points (V10, Max_PP) in the program. See section “Programming/conÿguration”.

See the Installation guide for Danfoss floats:

Type SV3 – Lit.No. : AN149486432996
Type ICFD used in ICFD – Lit.No. : AN250286497620
Refer to Setup IPS 8 for Bubbler support: AN370832505987
See Installation guide for LLS 4000 Liquid Level Switch: AN317523977313.
The IPS 8 is prepared for control of the Bubbler.
The MCX15B2 controller in the IPS 8 will automatically manage the water level of the bubbler. A cleaning cycle program is available along with possible manual operation at start-up.
With our solution of the IPS 8 Air Purger combined with the Bubbler, we can help customers to keep machine rooms free of ammonia smelling, while IPS 8 removes the non-condensable gases, and purging to the Bubbler.

Bubbler activation

Main Switch OFF – Login – Password 200 – Unit config – Bubbler settings – On/O˛ bubbler – ON
Fig. 10C.1 Bubbler activation

See Installation guide

Bubbler for IPS – 084H5070: AN480520648609

Installation

The Danfoss IPS 8 must be installed under locations recommended in the Connection Locations and Connection Points sections of this document.
The unit has a protection rating of IP55 and may be installed outside, in ambient temperature ranges from from -10 °C to 43 °C / 14 °F to 109 °F).
Avoid installation in direct sunlight as this may lead to excessive sunlight exposure and ambient temperatures above allowed limits.
For ambient temperatures below -10 °C (14 °F), the air purger must be installed in a heated and ventilated area.
The unit must be installed in a non-ATEX atmosphere as the purger unit is not explosion-proof.
The purger unit should be kept in an upright position at all times – from receipt to ÿnal installation.
Use all 4 lifting eyes and suitable lifting gear during installation (unit weight = 100 kg/220 lbs).
Install the unit on an even horizontal base 0.05 to 1.1 meter (2 to 43 in) above a service platform with su°cient support and allow the purger subframe to be bolted to the support (see example in Fig. 12).
Maintain recommended distances in all directions (Fig. 12) to allow fan cooling and servicing.
Always leave the unit o˛ for at least 12 hours from finished installation to first time power up.
It is important that the support construction is level to ensure the internal liquid trap is properly Filed.

Angle to horizontal < 2 degrees

Prepare the ammonia pipework with the weld ˝ange according to Fig. 13 and Fig. 14. The main/drain piping should never be smaller than the inner diameter Ø37 mm (1.5 in).
Complete the supporting structure able to carry 100 kg (221 lbs).
Lift the purger into position using the lifting eyes on each side of the purger’s cabinet. Remove the rubber plug from the ˜ange opening. See Fig. 13.
Connect the weld ˝ange with the purger ˝ange using the enclosed ˝at gasket and tighten the supplied 4 bolts diagonally to a torque of 60 Nm (44.3 ft-lb).
Insert 4 bolts (not supplied) through the purger frame and the support construction and tighten.
Perform a leak test to ensure an airtight connection.
In the event the purger unit needs to be dismantled please contact Danfoss for instructions.
Correctly install a suitable pipe/hose from the purge solenoid valve for blow-o˛ of NC gases under local or national regulations.
Prepare an outside water tank with a maximum of 200 liters (53 gal.) and ensure the piping allows the purged gas to be immersed in the water.
Regularly check the pH level of the tank’s contents.
The pH level should never exceed 12.6. Otherwise, the water content must be renewed.
Dispose of concentrated wastewater per local/national regulations.
- Note: Before replacing the water in the water tank ensure that the purger is switched o˛ and the shut o˛ valve at the ˝anged purger inlet is closed.
- Leave the unit in this condition for a period to allow the remaining gas in the piping to be dissolved/released.
- Watch out for bubbles.
- Establish a procedure for regularly checking the pH level and bubble pattern.
- If continuous bubbles are observed in the water tank during ‘‘stand by” (Green light indicator) in normal operation, one or more of the purge solenoid valves need repair or replacement.

Electrical wiring

The internal wiring of the purger is done at the factory. Only the electrical wiring for the main power supply, the purge point solenoids, and optional bus communication need wiring on site.
It is highly recommended that all external cables coming from the IPS 8 to the power supply and all purge point solenoids are protected by metallic pipes.
The controller box cover can only be opened at key unlock and with the main switch o˛.
Note: Authorized personel only

Light Indicators

Lights ON	Status	Compressor ON	Compressor OFF	Purge Valve ON	Purge Valve OFF	Alarm
Green	Stand by		x		x
Yellow	Run	x			x
Green & Yellow	Purging	x		x
Green & Yellow & Red	Uninterrupted Long time purging (> 150 h)	x		x*
Red	Occurs when: Check the list of alarms description	(x**)	x**			x

The purger continuously purges until the max running period (default 160 h) is reached and the purger compressor will stop.
The purger compressor stops when an alarm occurs

Quick Startup

For the fastest possible system configuration after connecting all purge points to the IPS and following

First power-up of the IPS, follow these simple instructions:

Navigate from the Main Menu to Login
Enter password ‘200’.
Choose ‘Parameters’.
Choose ‘Unit Config’
Choose ‘Valve Settings’
Enter the amount of purge solenoid valves connected to the IPS.

Navigation – built-in MCX controller

(Placed at the rear of the front panel door)
After switching on the controller, a display window will momentarily show the actual software version, followed by the default main operating window shown in Fig. 26.
While in operation mode, the Up/Down arrow buttons lead the user to the status windows described in Table 01 below.
Bubbler functionality. See Fig. 22

Configuring IPS via the HMI1) on the MCX15B2 controller

Pressing the main menu will show up with the options below

Table 01 Main menu navigation

Label ID	Parameter Name	Description and selection options	Min.	Max.	Value/ Type	Unit	RW	MODBUS Register
StU	General > Setup
y01	Main switch	Release the IPS for operation OFF: the IPS is forced out of operation ON: the controller was released for operation. Observe if DI1, On/ Off – External Mainswitch must also be ON to release the IPS for operation	0	1	0 – OFF	Enum 1	RW	3001
y07	Restore default parameters	Back factory settings No: Not active Yes: All parameters will be returned to factory default settings, and the alarm list will be cleared. The parameter will automatically be set back to ‘No’ when the factory reset has finished (after a few seconds).	0	1	0 – NO	Enum 2	RW	3002
SEr	General > Serial settings
SEr	Serial address (Modbus and CAN)	Enter the ID address of the controller Only relevant if connected to external equipment (like PLC) or other Danfoss equipment.	1	100	1		RW	3006
bAU	Serial baud rate (Modbus)	Baudrate The system unit usually communicates with 38.400. 0=0 1=12 corresponds to 1200 2=24 corresponds to 2400 3=48 corresponds to 4800 4=96 corresponds to 9600 5=144 corresponds to 14400 6=192 corresponds to 192000 7=288 corresponds to 288000 8=384 corresponds to 38400	0	8	8 – 384	Enum 3	RW	3007
COM	Serial settings (Modbus)	Serial mode 0=8N1 1=8E1 2=8N2	0	2	1 – 8E1	Enum 4	RW	3008
ExP	General > Expansion settings
Ex1	Enable expansion	Enable expansion of extra purge points. Panel with MCX controller to purge extra purge points, in addition to the 8 purge points at the main IPS No: Disabel Yes: Enable	0	1	0 – NO	Enum 2	RW	3013
Ex2	Expansion address	Expansion address of MCX controller Located in external panel (outside main IPS electrical panel)	0	255	125		RW	3014
CMP	Unit config > Compressor
CM3	PDT	Pull down time Pull down time of the compressor	1	CM4	40	min	RW	3016
CM4	CST	Compressor start time See Fig. 2 for details	180	2000	1440	min	RW	3017
VA5	PLT	Endless purging max time Max time for endless purging on one point. When the time has expired, IPS will go to the next Purge Point (PP)	2	768	24	h	RW	3018
VAL	Unit config > Valve settings
VA2	DeltaTValveOFF	Temperature difference Open/Close Main Purge valve Temperature difference between the opening and closing setpoint of the main Purge valve on DO2	2.0	10.0	5.0		RW	3019
V10	Max_PP	Max number of Purge points Enter the number of purge points (valves) connected to the IPS	1	16	8		RW	3026
BUB	Unit config > Bubbler settings
BU6	On/Off Bubbler	Bubbler connected? Select if a bubbler is connected and the water valve (on DO15)will be controlled OFF: Function disabled ON: Function enabled	0	1	0 – OFF	Enum 1	RW	3032
BU1	Bubbler time	Bubbler time Time for water valve to open for adding water to bubbler after start of compressor	0	720	30	s	RW	3033
BU2	Bubbler manual off time	Bubbler manual off time Only active if BU3, Bubbler man start=ON Se description for BU3, Bubbler man start	0	100	1	min	RW	3034
BU3	Bubbler man start	Manual opening of water valve for bubbler Select manual opening of water valve – DO15 OFF: Function disabled ON: Function enabled. The water valve will be open for the time,given by BU3, Bubbler man start has expired and closed again	0	1	0 – OFF	Enum 1	RW	3035

Label ID	Parameter Name	Description and selection options	Min.	Max.	Value/ Type	Unit	RW	MODBUS Register
BU4	Clean period	Bubbler cleaning program The setting of time between start cleaning of the bubbler. See description for BU5, Clean duration	0	72	24	h	RW	3036
BU5	Clean duration	Bubbler cleaning program – duration Once the Cleaning start period, given by BU4, Clean period, has passed, the water valve – DO15, will open until the time given by BU5, the Clean duration has expired.	0	100	5	min	RW	3037
BU7	Water stop delay	Water stop delay Delay for closing water valve – DO15 after main purge valve – DO2 is closed	0	360	30	sec	RW	3038
LIM	Unit config > Limits settings
LI3	BPLMin	Calibration Low Pressure tranmitter R452A. [bar] Minimum value	-1.0	25.0	0.1	bar	RW	3051
F06	BPLMin	Calibration Low Pressure tranmitter R452A. [psi] Minimum value	-14.5	362.6	1.4	Psi	RW	3052
LI6	BPHMax	Calibration of High Pressure tranmitter R717. Min [bar] Maximum value	-1.0	59.0	24.0	bar	RW	3057
F09	BPHMax	Calibration of High Pressure tranmitter R717. Min [psi] Maximum value	-14.5	855.7	348.0	Psi	RW	3058
CM1	Setpoint	Setpoint [bar] Minimum pressure at when the purging process will start. If the P717 pressure (AI2) – is lower than this setpoint, Purge point 1 will open, then Purge point 2 automatically, etc. Once purging a given Purge point and P717 pressure (AI2) – is higher than this setpoint, the cycle with the compressor will start. See also V48, Setpoint_Out	5.0	12.0	6.5	bar	RW	3061
F10	Setpoint	Setpoint [psi] Minimum pressure at when the purging process will start. If the P717 pressure (AI2) – is lower than this setpoint, Purge point 1 will open, then Purge point 2 automatically, etc. Once purging a given Purge point and P717 pressure (AI2) – is higher than this setpoint, the cycle with the compressor will start. See also V48, Setpoint_Out	41.0	174.0	94.2	Psi	RW	3062
UNI	Service > Unit
UN1	Unit sensor	Display unit 0:MET: Metric units – Celsius (°C) and Bar 1:IMP: Imperial units – Fahrenheit (°F) and psi	0	1	0 – Metric	Enum 6	RW	3065
LOG	Status var > MCX Design Hotspots
C01	Reset Alarms	Reset Alarms	0	2	0		RW	1859
V02	SystemOnOff	System ON / OFF Status of both internal and external main switch and internal main switch	-32768	32767	0		Read	8101
V03	ValveStatus	Purge Valve status Status of Main purge valve AKVA – DO2	-32768	32767	0		Read	8102
V04	CompressorStatus	Compressor Status Status of Compressor operation – DO1	-32768	32767	0		Read	8103
V06	PressTotemp	Pressure to temperature Pressure from Low-Pressure transmitter R452A, AI1 calculated to temperature	-327.7	327.7	0.0		Read	8104
V07	ValveCount	Valve counter The amount of purge valve activations for the Main purge valve AKVA – DO2	-2147483648	2147483647	0		Read	8105
V08	ComprTime	ComprTime Remaining time for compressor pull-down for the actual purge point cycle	-2147483648	2147483647	0		Read	8107
V09	COmprStartAfter	COmprStartAfter Delay of compressor start between the purging cycles	-2147483648	2147483647	0		Read	8109
V11	ValveHour	Valve Hours The number of hours that the main purge valve has been active	-214748364.8	214748364.7	0.0		Read	8111
V12	StatusKL	Status of relay (KL) operation compressor Status of KL01 relay (compressor) See electrical diagram	-32768	32767	0		Read	8113
V13	WaringCompr	Warning compressor Indicates a problem with compressor status	-32768	32767	0		Read	8114
V14	ValveSetpoint	Main Purge valve setpoint Temperature threshold for the opening of the Main purge valve AKVA on DO2 Correspond to “VOpenT” on HMI By default (“VClseT”- “VOpenT”= 5K(9R) The 5K(9R) window will move with the Psat717 on AI2. If Psat717 is increasing both “VClseT” and “VOpenT” will increase but with a difference of 5K(9R) If Psat717 is decreasing both “VClseT” and “VOpenT” will decrease but with a difference with 5K(9R) See also: V15, Valve Close V42, BPHStatus	-2147483648	2147483647	0		Read	8115

Label ID	Parameter Name	Description and selection options	Min.	Max.	Value/ Type	Unit	RW	MODBUS Register
V15	ValveClose	Main Purge valve setpoint Temperature threshold for the closing of the Main purge valve AKVA on DO2 Correspond to “VClseT” on HMI By default (“VClseT”- “VOpenT”)= 5K(9R) If Psat717 is increasing both “VClseT” and “VOpenT” will increase but with a difference of 5K(9R) If Psat717 is decreasing both “VClseT” and “VOpenT” will decrease but with a difference with 5K(9R) See also V14, ValveSetpoint V42, BPHStatus	-2147483648	2147483647	0		Read	8117
V16	Event1	Purge event no. 1 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8118
V17	Event2	Purge event no. 2 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8120
V18	Event3	Purge event no. 3 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8122
V19	Event4	Purge event no. 4 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8124
V20	Event5	Purge event no. 5 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8126
V21	Event6	Purge event no. 6 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8128
V22	Event7	Purge event no. 7 Purge cycle event counts of minutes that the purge valve has been open, during a finished cycle	-3276.8	3276.7	0.0		Read	8130
V23	PP1	Percentage for purge point valve no. 1 The time percentage split for this purge point	-32768	32767	0		Read	8132
V24	PP2	Percentage for purge point valve no. 2 The time percentage split for this purge point	-32768	32767	0		Read	8134
V25	PP3	Percentage for purge point valve no. 3 The time percentage split for this purge point	-32768	32767	0		Read	8136
V26	PP4	Percentage for purge point valve no. 4 The time percentage split for this purge point	-32768	32767	0		Read	8138
V27	PP5	Percentage for purge point valve no. 5 The time percentage split for this purge point	-32768	32767	0		Read	8140
V28	PP6	Percentage for purge point valve no. 6 The time percentage split for this purge point	-32768	32767	0		Read	8142
V29	PP7	Percentage for purge point valve no. 7 The time percentage split for this purge point	-32768	32767	0		Read	8144
V30	PP8	Percentage for purge point valve no. 8 The time percentage split for this purge point	-32768	32767	0		Read	8146
V31	Val1	Status for purge point valve no. 1 This indicates if the purge point is active (open)	-32768	32767	0		Read	8148
V32	Val2	Status for purge point valve no. 2 This indicates if the purge point is active (open)	-32768	32767	0		Read	8149
V33	Val3	Status for purge point valve no. 3 This indicates if the purge point is active (open)	-32768	32767	0		Read	8150
V34	Val4	Status for purge point valve no. 4 This indicates if the purge point is active (open)	-32768	32767	0		Read	8151
V35	Val5	Status for purge point valve no. 5 This indicates if the purge point is active (open)	-32768	32767	0		Read	8152
V36	Val6	Status for purge point valve no. 6 This indicates if the purge point is active (open)	-32768	32767	0		Read	8153
V37	Val7	Status for purge point valve no. 7 This indicates if the purge point is active (open)	-32768	32767	0		Read	8154
V38	Val8	Status for purge point valve no. 8 This indicates if the purge point is active (open)	-32768	32767	0		Read	8155
V40	TempStatus	NonCondensable gas Temperature sensor NC temperature sensor The measured NC temperature sensor. From AI5	-32768	32767	0		Read	8156
V41	BPLStatus	Low Pressure tranmitter R452A The measured pressure is R452A. From AI1	-32768	32767	0		Read	8157
V42	BPHStatus	High Pressure tranmitter R717 The measured pressure is R717. From AI2	-2147483648	2147483647	0		Read	8158
V43	DisTemp	Discharge Temperature The measured temperature on the discharge line of the compressor. From AI3	-32768	32767	0		Read	8159

Label ID	Parameter Name	Description and selection options	Min.	Max.	Value/ Type	Unit	RW	MODBUS Register
V44	SuctionTemp	Suction Temperature The measured temperature at the main purge valve. From AI4	-2147483648	2147483647	0		Read	8160
V45	TshValveStatus	LOW charge operation Linked to below mention text on HMI If V46, TshCalculate > 15 K then showing “TshValve OFF” the main purge valve, D02 will close If V46, TshCalculate < 15 K then showing “TshValve ON” is normal operation	-32768	32767	0		Read	8161
V46	TshCalculate	Superheat calculated Calculated Superheat= (T452- P452[C]) T452: Suction Temperature R452A sensor from AI4 P452[C]: Low Pressure transmitter R452A from AI1 calculated into temperature Shown on HMI as “Tsh Calculate” See also: V06, PressTotemp V44, SuctionTemp	-2147483648	2147483647	0		Read	8162
V47	attractive	Alarm active One or more alarms active 0: No Alarm 1: One or more alarms active	0	1	0		Read	8164
V48	Setpoint_Out	Read out of setpoint Similar to the readout on HMI: “P717Off” See also CM1, Setpoint	-2147483648	2147483647	0		Read	8165
V49	Point_Status	Read out of which Purge point No. is active Readout of which Purge point number that is actively purging. Similar to the number in HMI	-32768	32767	0		Read	8167
V50	SysOFF	Read out if IPS is not in operation Read out if IPS is not in operation	-32768	32767	0		Read	8168
V51	PP9	Percentage for purge point valve no. 9 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8169
V52	PP10	Percentage for purge point valve no. 10 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8171
V53	PP11	Percentage for purge point valve no. 11 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8173
V54	PP12	Percentage for purge point valve no. 12 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8175
V55	PP13	Percentage for purge point valve no. 13 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8177
V56	PP14	Percentage for purge point valve no. 14 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8179
V57	PP15	Percentage for purge point valve no. 15 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8181
V58	Val9	Status for purge point valve no. 9 This indicates if the purge point is active (open)	-32768	32767	0		Read	8183
V59	Val10	Status for purge point valve no. 10 This indicates if the purge point is active (open)	-32768	32767	0		Read	8184
V60	Val11	Status for purge point valve no. 11 This indicates if the purge point is active (open)	-32768	32767	0		Read	8185
V61	Val12	Status for purge point valve no. 12 This indicates if the purge point is active (open)	-32768	32767	0		Read	8186
V62	Val13	Status for purge point valve no. 13 This indicates if the purge point is active (open)	-32768	32767	0		Read	8187
V63	Val14	Status for purge point valve no. 14 This indicates if the purge point is active (open)	-32768	32767	0		Read	8188
V64	Val15	Status for purge point valve no. 15 This indicates if the purge point is active (open)	-32768	32767	0		Read	8189
V66	ResetMem	Reset Memory	0	1	0		RW	9902
V66	PLT_Out_Timer	Timeout for PLT timer	-2147483648	2147483647	0		Read	8191
V67	Bubler	Water solenoid for Bubbler Status This indicates if the Water solenoid is closed or open. Connected on DO15	-32768	32767	0		Read	8193
V68	ICFD_Status	ICFD Status This indicates if the ICFD is closed or open. Connected on DO6	-32768	32767	0		Read	8194
V69	Val16	Status for purge point valve no. 16 This indicates if the purge point is active (open)	-32768	32767	0		Read	8195
V70	Liter	Amount of NC liters removed Show how many liters of Non Condensable gases have been removed in total	-2147483648	2147483647	0		Read	8196
V71	PP16	Percentage for purge point valve no. 16 The time percentage split for this purge point	-2147483648	2147483647	0		Read	8198

ALARMS E type: System related A type: General Process alarms All Auto Reset, except E13
	Parameter Name	Description	Min.	Max.	Value/ Type	Unit	RW	ADU
A01	General Alarm	If DI3, General Alarms is OFF, it leads to shut down of IPS 8	0	1	AUTO	ACTIVE	Read	1901 .08
E01	NC Temp Sensor Fault	AI5, NC temperature sensor fault	0	1	AUTO	ACTIVE	Read	1901 .09
E02	BPL Sensor Fault	AI1, Low Pressure R452A tranmitter fault	0	1	AUTO	ACTIVE	Read	1901 .10
E03	BPH Sensor Fault	AI2, High Pressure R717 transmitter fault	0	1	AUTO	ACTIVE	Read	1901 .11
E04	Dis. Temp.Sens Low temperature	AI3, Discharge Temperature R452A sensor. Low-temperature alarm	0	1	AUTO	ACTIVE	Read	1901 .12
E05	Dis. Temp.Sens Hi temperature	AI3, Discharge Temperature R452A sensor. High-temperature alarm	0	1	AUTO	ACTIVE	Read	1901 .13
E06	Low-pressure BPL	AI1, Low Pressure R452A tranmitter. Low-pressure alarm	0	1	AUTO	ACTIVE	Read	1901 .14
E07	Hi pressure BPL	AI1, Low Pressure R452A tranmitter. High pressure alarm	0	1	AUTO	ACTIVE	Read	1901 .15
E08	Low pressure BPH	AI2, High Pressure R717 tranmitter. Low pressure alarm	0	1	AUTO	ACTIVE	Read	1901 .00
E09	Hi pressure BPH	AI2, High Pressure R717 tranmitter. High-pressure alarm	0	1	AUTO	ACTIVE	Read	1901 .01
E10	System is OFF	If DI2, (external) Main Switch is OFF, it leads to shut down of the IPS	0	1	AUTO	ACTIVE	Read	1901 .02
E11	Memory is full	A memory reset is required	0	1	AUTO	ACTIVE	Read	1901 .03
E12	Total purge time error	Occurs when PLT is activated. The system will automatically restart when CST has expired	0	1	AUTO	ACTIVE	Read	1901 .04
E13	Compressor EROR	Feedback from compressor relay KL1 in the electrical panel of IPS If DI1, Status KL1 – Compressor in operation, is OFF, while DO1, Compressor is ON, it leads to to shut down of IPS	0	1	AUTO	ACTIVE	Read	1901 .05
E14	Liquid alarm	If DI4, LLS 4000 is OFF (liquid in the evaporator), it leads to shut down of IPS	0	1	Manual Mode	ACTIVE	Read	1901 .06
E15	Memory wrong!	Carry out: Reset to factory setting	0	1	AUTO	ACTIVE	Read	1901 .07
E16	Discharge sensor error	AI3, Discharge Temperature R452A sensor fault	0	1	AUTO	ACTIVE	Read	1902 .08
E17	Suction sensor error	AI4, Suction Temperature R452A sensor fault	0	1	AUTO	ACTIVE	Read	1902 .09
E18	Tsh Alarm	Superheat alarm. If V46, TshCalculate> Alarm setting default Delta 15 K (LI7, Tsh Danfoss only.)	0	1	AUTO	ACTIVE	Read	1902 .10
E19	NC.Temp.Sensor Hi temperature	AI5, NonCondensable gas Temperature sensor High-temperature alarm	0	1	AUTO	ACTIVE	Read	1902 .11
E20	NC.TempSens Low temperature	AI5, NonCondensable gas Temperature sensor Low-temperature alarm (-10 °C)	0	1	AUTO	ACTIVE	Read	1902 .12
E21	TempSucion.Sens Hi temperature	AI4, Suction Temperature R452A sensor. High-temperature alarm	0	1	AUTO	ACTIVE	Read	1902 .13
E22	TempSucion.Sens Low temperature	AI4, Suction Temperature R452A sensor. Low-temperature alarm	0	1	AUTO	ACTIVE	Read	1902 .14
E23	Configuration error	No Expansion panel found	0	1	AUTO	ACTIVE	Read	1902 .15
E24	Link error	No Expansion panel was lost. Check CAN connection	0	1	AUTO	ACTIVE	Read	1902 .00
	I/O CONFIGURATION
	PARAMETER NAME	Description	MIN	MAX	VALUE/ TYPE	UNIT	RW	ADU
AI	ANALOG INPUTS
1	BPL-1/34	Low Pressure R452A tranmitter	-1.0	34.0	0-5 V		Read	18503
2	BPH-1/59	High Pressure R717 tranmitter	-1.0	59.0	0-5 V		Read	18504
3	Dis. Temp	Discharge Temperature R452A sensor	-30.0	170.0	PT1000		Read	18502
4	Suction Temp	Suction Temperature R452A sensor	-50.0	170.0	PT1000		Read	18506
5	NC Temp	NonCondensable gas Temperature sensor	-50.0	170.0	PT1000		Read	18505

	Parameter Name	Description	Min.	Max.	Value/ Type	Unit	RW	ADU
DI	DIGITAL INPUTS
1	Status KL1	Status KL1 – Compressor in operation	0	1	N.O.		Read	17504
2	On/Off	On/Off – External Mainswitch	0	1	N.O.		Read	17502
3	General Alarm	General Alarm – SW prep area	0	1	N.O.		Read	17503
4	LiquidAlarm	Liquid Alarm – from LLS 4000/4000U	0	1	N.O.		Read	17505
5	Switch	Switch – Switch to the next purge point (pulse). SW prepared	0	1	N.O.		Read	17506
6	Bubbler On	Bubbler On – Force Bubbler solenoid ON. SW prepared	0	1	N.O.		Read	17507

DO	DIGITAL OUTPUTS
1	Compressor	Compressor	0	1	N.O.	Read	18007
2	Valve	Valve – Main purge valve AKVA	0	1	N.O.	Read	18008
3	Green	Green – Lamp in the front panel – Standby	0	1	N.O.	Read	18004
4	Yellow	Yellow- Lamp in the front panel – Run	0	1	N.O.	Read	18005
5	DO_Red	Red – Lamp in front panel – Error	0	1	N.O.	Read	18006
6	ICFD_Valve	ICFD_Valve	0	1	N.O.	Read	18017
7	Valve1	Purge valve no. 1	0	1	N.O.	Read	18009
8	Valve2	Purge valve no. 2	0	1	N.O.	Read	18010
9	Valve3	Purge valve no. 3	0	1	N.O.	Read	18011
10	Valve4	Purge valve no. 4	0	1	N.O.	Read	18012
11	Valve5	Purge valve no. 5	0	1	N.O.	Read	18013
12	Valve6	Purge valve no. 6	0	1	N.O.	Read	18014
13	Valve7	Purge valve no. 7	0	1	N.O.	Read	18015
14	Valve8	Purge valve no. 8	0	1	N.O.	Read	18016
15	Bubler	Water valve for bubbler	0	1	N.O.	Read	18018
16	Valve9	Purge valve no. 9	0	1	N.O.	Read	18019
17	Valve10	Purge valve no. 10	0	1	N.O.	Read	18020
18	Valve11	Purge valve no. 11	0	1	N.O.	Read	18021
19	Valve12	Purge valve no. 12	0	1	N.O.	Read	18022
20	Valve13	Purge valve no. 13	0	1	N.O.	Read	18023
21	Valve14	Purge valve no. 14	0	1	N.O.	Read	18024
22	Valve15	Purge valve no. 15	0	1	N.O.	Read	18025
23	Alarm	Alarm	0	1	N.O.	Read	18002

Table 02 Occurring active alarms, possible reasons, and recommended action

Label	Parameter Name	Description	Possible Reason	Recommended action
	ALARMS
A01	General Alarm	Input from AI3 Leads to shut down of IPS 8	Fault in the system connected to the DIO4	Input from AI3 Leads to shut down of IPS 9
E01	Temp Sensor Fault	Indicates no signal from temperature sensor (R452a)	Broken wire to R452a temperature sensor	Repair the temperature sensor wire or replace the temperature sensor
E01	Temp Sensor Fault	Indicates no signal from temperature sensor (R452a)	Electrical supply failure supplying R452a temperature sensor	Repair or replace power source
E01	Temp Sensor Fault	Indicates no signal from temperature sensor (R452a)	Temperature measurement of the R452a line is out of range	Compare temperature with another temperature sensor reading and replace temperature sensor if needed
E02	BPL Sensor Fault	Indicates no signal from a pressure transmitter (R452a)	Broken wire to R452A pressure transmitter	Repair the pressure transmitter wire or replace the pressure transmitter
E02	BPL Sensor Fault	Indicates no signal from a pressure transmitter (R452a)	Electrical supply failure to the R422a pressure transmitter	Repair or replace power source
E02	BPL Sensor Fault	Indicates no signal from a pressure transmitter (R452a)	Pressure measurement of the R452a line is out of range	Compare pressure with another pressure reading and replace the pressure transmitter if needed
E03	BPH Sensor Fault	Indicates no signal from a pressure transmitter (R717)	Broken wire to R717 pressure transmitter	Repair the pressure transmitter wire or replace the pressure transmitter
E03	BPH Sensor Fault	Indicates no signal from a pressure transmitter (R717)	Electrical supply failure to the R717 pressure transmitter	Repair or replace power source
E03	BPH Sensor Fault	Indicates no signal from a pressure transmitter (R717)	Pressure measurement of the R717 line is out of range	Compare pressure with another pressure reading and replace the pressure transmitter if needed
E04	Low temperature	Indicates too low ambient temperature (<-10 °C)	Too low ambient temperature	Move the IPS to a higher ambient temperature
E05	High temperature	Indicates too high ambient temperature (>120 °C)	Too high ambient temperature	Move the IPS to a lower ambient temperature
E05	High temperature	Low R452a charge because of a possible leak	Locate and repair leak	Move the IPS to a lower ambient temperature
E06	Low pressure BPL	Indicates too low R452a pressure	Choked restrictor / wrong piping	Factory setting 0.3 bar, we can have several problems: a) Restrictor is blocked (clean it). b) Wrong piping and additional ammonia is draining, so check pipings. c) Check SV float
E07	High-pressure BPL	Indicates too high R452a pressure	R452 system pressure is too high	a) Expansion valve is not working b) Too high ambient temperature (24 bar /54 ºC)
E08	Low-pressure BPH	Indicates too low R717 pressure	Closed stop valve	Purge points are blocked, or the flange is blocked with a rubber plug
E09	High-pressure BPH	Indicates too high R717 pressure	R717 system pressure too high	The pressure is 24 bar
E10	System is OFF	Indicates the status of the main switch	The main switch is OFF	Switch ON the main switch
E11	Memory is full	A memory reset is required	Memory is full from long-time operation	Clean MCX memory by finding Parameters_UnitConfig_
E12	Totla purge time error	This occurs when PLT is activated System will automatically restart when CST has expired	Restrictor is blocked	Replace the restrictor
E13	Compressor ERROR	Indicates no status is being received from relay KL01	Possible broken wire from the MCX	Repair broken wire from the MCX
E14	Liquid alarm	The signal from the LLS that there is liquid in the evaporator	Check piping
E15	Memory wrong!	Wrong counter values	Carry out: Reset to factory setting
E16	Discharge sensor error	Indicates no signal from the temperature sensor	Check sensor
E17	Suction sensor error	Indicates no signal from the temperature sensor	Check sensor

All alarms except (*) activate a red light on a box outside
For alarms not resettable and/or cause not identified, please contact Danfoss
Level legend: 0 = Read view, 2 = Installer view (code 200) 3 = Danfoss Service view (Contact Danfoss)

Modbus RTU Good Practice

The wiring of Modbus RTU (RS485) must be carried out per the standard ANSI/TIA/EIA-485-A-1998.
Galvanic separation shall be provided for segments crossing buildings. Common ground shall be used for all devices on the same network inclusive routers, gateways, etc.
All bus connections in the cables are made with twisted pair wires.
The recommended cable type for this is AWG 22/0.32 mm˘. If used for longer distances please use an AWG 20/0.5mm˘ or AWG 18/0.75mm˘ cable. The cable characteristic impedance shall be between 100 – 130
The capacitance between conductors shall be less than 100 pf per meter.
Note: the length of the cables influences the communication speed used. Longer cable lengths mean a lower baud rate should be used. The maximum cable length allowed is 1200m.
Use a minimum 20 cm distance between 110V/230V/400V power line cables and bus cables.

Maintenance/Service/Disposal

Table 03 Maintenance checklist – Perform once a year minimum

1	Use the P&I diagram and check that all powered components are working properly
2	Check for alarms in the MCX controller
3	Fans, air filters, and fins must be cleaned for dirt and dust
4	Expansion valve must be inspected and must be replaced if damaged
5	Ensure the expansion valve sensor bulb has good contact with the suction line
6	Replace water in a water bubble bath. Check pH level frequently and replace when pH > 12.6
7	Check cover is mounted correctly and all bolts are tightened accordingly
8	Check and verify the amperage of the unit
9	Check for abnormal compressor noises in normal operating conditions (may indicate loose bolts, worn bearings, or pistons)

Table 04 Procedure to isolate IPS for servicing

	Multipoint	Single-point purging from the receiver
1	Close all supply lines from the purge points of the ammonia system. Do not close any stop valve between IPS 8 and the float valve	Restart the controller to force pump-down
2	Restart the controller to force pump-down	Wait 20 minutes
3	Wait 20 minutes
4	Stop the compressor by turning the compressor switch QM1 to the off position	Stop the compressor by turning the compressor switch QM1 to the off position
5	Close the SVA shut-off valve in the drain line (located under the IPS 8)	Close the SVA shut-off valve in the drain line (located under the IPS 8)
6	Release the remaining system pressure to the atmosphere by opening the SNV drain valve. This can also be done by attaching a permanent magnet on the AKVA 10 valve for forced opening	Release the remaining system pressure to the atmosphere by opening the SNV drain valve. This can also be done by attaching a permanent magnet on the AKVA 10 valve for forced opening

Disposal of the IPS 8

If an IPS 8 unit is worn out and has to be replaced, the disposal must be done under national legislation and only done by competent personnel.
Danfoss A/S Climate Solutions
danfoss.com
+4574882222
Any information, including, but not limited to information on the selection of the product, its application or use, product design, weight, dimensions, capacity, or any other technical data in product manuals, catalog descriptions, advertisements, etc., and whether made available in writing, orally, electronically, online or via download, shall be considered informative, and is only binding if and to the exposed tries the right is oater in prudatis without ice,
This files to products ordered but diety ered sive er that such alteration, brochures made without her gest form, fit or function of the product.

Documents / Resources

Danfoss 148R9653 Intelligent Purging System [pdf] User Guide
BC344024774466en-000701, 148R9653, 148R9653 Intelligent Purging System, 148R9653, Intelligent Purging System, Purging System, System

References

User Manual

Danfoss 148R9653 Intelligent Purging System

Product Usage Instructions

FAQ