Product Overview
This document provides troubleshooting guidance for ActronAir Advance and Aires Split Ducted Units. It covers common issues, component testing, and fault code diagnosis.
Advance Model Numbers (R-410A): CRV140S, CRV160S, CRV180S, CRV160T, CRV180T, CRV210T, CRV240T
Advance Model Numbers (R-32): CRV13AS, CRV15AS, CRV17AS, CRV13AT, CRV15AT, CRV17AT
Aires Model Numbers: CRS10AS, CRS13AT, CRS13AS, CRS15AT, CRS15AS, CRS17AT, CRS17AS
Important Note: Please read this manual carefully before installing or operating your air conditioning unit.
01. General Troubleshooting
| Fault | Possible Causes | Remedies |
|---|---|---|
| The system does not start. | Built-in safety timers have been activated. * A circuit breaker may have tripped. The thermostat setpoint is incorrect. The master wall control timer is set. | Allow up to 5 minutes for the system to start from when it is turned on. * Check circuit breaker. Lower the set point on cooling or raise it on heating modes. Check the wall control timer settings. |
| No airflow from the outlets. | During heating operation, the hot start function may have been activated. The system may be operating in a defrost cycle during the heating cycle. (LR7 will display DEFROST. NEO will display Defrosting.) The return air filter may be dirty. The outdoor unit may have an obstruction on the air inlet or outlet. The airflow across the indoor coil may be outside of the operating range. | During heating operation, the indoor fan is delayed for 30 seconds or until the indoor coil reaches 25°C (whichever occur first). This is to prevent cold drafts. This is normal operation during the defrost cycle to prevent cold air being blown into rooms. Clean the return air filter. Ensure the air inlet and air outlet on the outdoor unit is not blocked. Check that the area around the outdoor unit is free from obstructions that may cause the airflow to recirculate. Reduce the total static pressure of the ductwork. For example increase duct sizes, reduce tight duct work bends or increase return air grille size. |
| Cooling/Heating is not sufficient. | The heat load is greater than the installation design. Windows or doors are open. The outside temperature is beyond the air conditioner design conditions. | Perform a heat load analysis on the conditioned space. Turn any unused zones to the off position. Close windows and doors in conditioned areas. When the ambient temperature is expected to exceed the maximum design operating temperature, turn the system on as early as possible. |
| Steam emitted from outdoor unit. | The indoor fan setting may be set too low. | Change the fan speed to a higher setting. This will increase system capacity. |
| Set temperature cannot be adjusted. | The outdoor unit is going through a defrost cycle during the heating cycle. Condensation of water on the outdoor coil during heating operation. | This is normal during the defrost operation in cold ambient conditions. This is normal during heating operation. Optional drip trays can be purchased to drain the excess water. |
| Occasional hissing noise can be heard during the heating cycle. | The wall control set temperature limits are being exceeded. | Check the upper and lower temperature limits are set correctly. |
| The compressor is operating but the system is not cooling. | This is the sound of the gas changing direction as the system goes through a defrost cycle. You are in heating mode. The reversing valve has not switched between heating and cooling. | This is a normal function of an air conditioner. Check the temperature settings. Test reversing valve. |
| Fault | Possible Causes | Remedies |
|---|---|---|
| The outdoor coil keeps freezing over. | Faulty outdoor coil sensor Jammed reversing valve. Obstruction on the outdoor unit. | Check the sensor resistance. Test the reversing valve operation. Remove obstructions. |
| There is only one condenser fan working. | Faulty fan motor. *Faulty capacitor Faulty Outdoor PCB. | Test the fan motor resistance. *Test the capacitor microfarad reading. Test the PCB output voltage. |
| Compressor won't operate at 100% capacity. | You can adjust your wall control temperature so you have a large differential. This will operate the system at 100% until the temperature gets to within 4°C of the setpoint. Note: If the system operates under Anti Freeze or Overheat Protection the system will not operate at 100% capacity | Adjust the set point less then or greater than 4°C of the indoor temperature depending on mode of operation. |
| Odour in the conditioned space when the A/C is turned on. | Indoor unit has absorbed the conditioned space smells eg. cigarette, cooking, etc. No P-Trap installed. Dry P-Trap. | If this happens, we recommend you have the indoor unit washed by a technician. Consult the installer from whom you purchased the air conditioner. Re-pipe drain with a P-Trap. Contact the installer to carry out a general service and fill the P-Trap. |
02. EC Fan Troubleshooting
| Fault | Sequence of Events | Possible Causes | Remedies |
|---|---|---|---|
| 1. Auto Mode is not available. | When scrolling through fan speeds, Auto Mode is not selectable. | During commissioning, Self-Learn mode was not activated. Self learn mode failed during commissioning. | Carry out self learn mode. Refer LR7/LC7/ NEO controller operation manual. |
| 2. Airflow hunting during Auto and Self Learn Mode. | Indoor fan will intermittently "huff". | Excessive static in ductwork. Duct static has changed since performing a self-learn. Ducts deteriorate, dirty filter, change in duct layout. | Ensure that the air is balanced correctly (static may be too high). Refer to Installation and Commissioning Guide-Indoor. Reduce static where possible. See installation guidelines on duct installation. Clean filter and re-perform self-learn. |
| 3. Too much airflow when minimum zones are on. | Air is blowing too much when set to minimum zones. | Fan not set to Auto Mode. Poor air balance. Minimum duct and outlet sizes requirements not followed. | Change fan setting to Auto Mode Carry out air balance and install manual dampers as required. Check Installation and Commissioning Guide-Indoor and adjust / change if necessary. |
| Fault | Sequence of Events | Possible Causes | Remedies |
|---|---|---|---|
| 4. Low airflow during AUTO Mode. | System produces reduced airflow on Auto mode when all or minimum zones are on. | System capacity has been designed to heat/cool only selected areas of the conditioned space at any one time. Excessive static in ductwork. | Operate indoor fan on Low/Med/High speed to achieve more airflow. Reduce static where possible. Review duct design with reference to Installation and Commissioning Guide-Indoor. |
| 5. Indoor fan not changing speeds when in Auto Mode | When zones are switched on or off, airflow to active zones doesn't increase or decrease. | There is excessive static within the duct design of the active zones. The indoor PCB is not changing the fan PWM to adjust the fan speed. | Review duct design with reference to Installation and Commissioning Guide-Indoor. Check the output PWM from indoor PCB. An increase in fan speed should result in a increase in the fan % PWM (duty cycle). Refer to table below test points expected voltages. |
| 6. HiS is displayed on the wall controller and Marginal Pass on NEO after a Self-Learn has been preformed (L Series Controller only). | System produces low airflow when AUTO mode is selected regardless of how many zones are open. | HiS is displayed on the wall control as a indication of very high static (>250Pa) in the connected return and supply duct which can further effect the supply air quantity during the auto mode. If there is too much static during self-learn, then the controller will automatically decrease the indoor fan speed until an acceptable static is achieved and the self-learn can be completed with reduced airflow. | To determine if the system may be suffering from excessive or insufficient static, check PWM & RPM values through the indoor unit dashboard on the Master Wall Controller: • If the RPM is at its maximum value, and the PWM has not reached its requested value, this indicates a high static. (Please refer to RPM Limits in Section 0.3) • When switching off zones, and there is little or no change in the RPM value, this indicates insufficient static within remaining active zones duct work. Reduce static where possible. Review duct design with reference to Installation and Commissioning Guide - Indoor. Once static has been reduced perform Self-Learn again. |
03. Indoor Fan PWM and RPM Limits Table
03.01. Advance R-410A (Indoor Units paired to an Outdoor Unit with a UNO Board)
| Unit Model | PWM % (Approx) | ||
|---|---|---|---|
| Low | Medium | High | |
| EVV140S | 35 | 47 | 60 |
| EVV160S | 42 | 58 | 77 |
| EVV180S | 50 | 69 | 99 |
| EVV210S | 43 | 61 | 82 |
| EVV240S | 44 | 62 | 84 |
| Unit Model | RPM Limits | ||
|---|---|---|---|
| Low | Medium | High | |
| EVV140S | 1150 | 1290 | 1390 |
| EVV160S | 1150 | 1290 | 1390 |
| EVV180S | 1150 | 1290 | 1390 |
| EVV210S | 1150 | 1350 | 1500 |
| EVV240S | 1150 | 1350 | 1500 |
03.02. Advance R-32 (Indoor Units paired to an Outdoor Unit with an UNO-Pro Board)
| Unit Model | PWM % (Approx) | ||
|---|---|---|---|
| Low | Medium | High | |
| EVV13AS | 40 | 50 | 64 |
| EVV15AS | 52 | 64 | 73 |
| EVV17AS | 57 | 73 | 99 |
| Unit Model | RPM Limits | ||
|---|---|---|---|
| Low | Medium | High | |
| EVV13AS | 1380 | 1380 | 1380 |
| EVV15AS | 1380 | 1380 | 1380 |
| EVV17AS | 1380 | 1380 | 1380 |
03.03. Aires (Indoor Units paired to an Outdoor Unit with an UNO-Pro Board)
| Unit Model | PWM % (Approx) | ||
|---|---|---|---|
| Low | Medium | High | |
| EVA10AS | 40 | 55 | 72 |
| EVA13AS | 40 | 50 | 64 |
| EVA15AS | 52 | 64 | 73 |
| EVA17AS | 57 | 73 | 99 |
| Unit Model | RPM Limits | ||
|---|---|---|---|
| Low | Medium | High | |
| EVA10AS | 1150 | 1350 | 1500 |
| EVA13AS | 1380 | 1380 | 1380 |
| EVA15AS | 1380 | 1380 | 1380 |
| EVA17AS | 1380 | 1380 | 1380 |
04. Component Troubleshooting
04.01. Testing Indoor Board
A diagram shows the indoor control board (ActronAir INZONE3 23827-3). It has various connectors for fan, wall controller, outdoor communication, and power.
Procedure:
- Disconnect wires from the Wall Control Communication and Outdoor Communication plugs into the indoor board.
- Loop the "A" terminal from the Wall Control communication plug to the "A" terminal on the Outdoor Communication Plug.
- Loop the "B" Terminal from the Wall Control communication plug to the "B" terminal on the Outdoor Communication Plug.
- Power the board. If the WCCOM2 LED flashes and the OUTDOORCOM1 flashes, then the indoor board is communicating.
04.02. Expected Control Voltage On Communication Line - InZone Board (R-410A / R-32)
Notes:
- If COM1 (LED1) and COM2 (LED2) are blinking, communication is occurring.
- Voltage between A-G and B-G fluctuating indicates communication is occurring.
- Ensure communication wires are properly connected to the CPU board before measuring control voltage.
A diagram illustrates the Indoor CPU Board (Evaporator) with connections for Fan Power, Coil Temp, Indoor Fan PWM, Indoor Fan, Wall Controller, Outdoor 485, and Zone connections. It specifies VDC values for UNO Board (0.4 - 3 VDC) and UNO Pro Board (1 - 3 VDC).
04.03. Expected Control Voltage On Communication Line - UNO Board Series (R-410A)
A diagram shows the Condenser CPU Board with connections for Display, sensors, fan power, control signals (PWM, VSD), and communication (COM, 485). It also shows the SMPS 240VAC/12VDC unit and fuses. VDC values are indicated for various points.
04.04. Expected Control Voltage On Communication Line - UNO Pro Board (R-32)
A diagram shows the UNO Pro Board with connections for Fan Control, EXV, output signals, communication (INDOOR 485, VSD 485), sensors, and power. VDC values are specified for various terminals.
04.05. Expected Voltage - InZone PCB To Indoor Fan
A diagram illustrates the connection between the Indoor CPU Board (Evaporator) and the Indoor Fan (IF) via an ECM Control Module. Connections include Fan Power, Coil Temp, Indoor Fan PWM, and Indoor Fan.
Note: Refer to tables for wire color codes.
Step 1: Measure the Indoor Fan on/off signal between Pin 1 and 3.
| Unit Model | On Signal is 12VDC signal | Off Signal is +0VDC signal | ||
|---|---|---|---|---|
| Regal Fan | Elgee Fan | Regal Fan | Elgee Fan | |
| EVA10AS / EVV210-240S | Red and Blue | - | Red and Blue | - |
| EVV13-17AS EVV140-180S EVA13-17AS | - | Yellow and Black | - | Yellow and Black |
Step 2: Measure duty cycle.
- Set the tester to measure duty cycle.
- Set the indoor fan to a fixed speed (e.g., High) and turn all zones on.
- Measure the Indoor Fan on/off signal between Pin 3 and 4 using the wire colors shown in the table below.
| Unit Model | Regal Fan | Elgee Fan |
|---|---|---|
| EVA10AS / EVV210-240S | Blue and Yellow | - |
| EVV13-17AS EVV140-180S EVA13-17AS | - | Black and Red |
4. Change fan speed and check for any changes in readings.
5. Compare the duty cycle output to the expected PWM for each model.
Note: Duty cycle cannot be tested in voltage. A voltage on the PWM line indicates a Duty Cycle is present.
04.06. Compressor Winding Resistance
A diagram shows the winding connections (U, V, W) for a single-phase compressor.
Advance R-410A
| Unit Model | Compressor Part Number/Model | Rating Of Compressor Windings (Ω)* | ||
|---|---|---|---|---|
| U - V | V - W | U - W | ||
| CRV140S CRV160S CRV180S | 1560-476 | 0.338 | 0.338 | 0.338 |
| CRV160T CRV180T | 0.521 | 0.521 | 0.521 | |
| CRV210T CRV240T | 0.610 | 0.610 | 0.610 | |
| CRV13AS CRV15AS CRV17AS | 1560-477 | 0.345 | 0.345 | 0.345 |
| CRV13AT CRV15AT CRV17AT | 1560-478 | 0.658 | 0.658 | 0.658 |
Advance R-32
| Unit Model | Compressor Part Number/Model | Rating Of Compressor Windings (Ω)* | ||
|---|---|---|---|---|
| U - V | V - W | U - W | ||
| CRV13AS CRV15AS CRV17AS | 1560-477 | 0.345 | 0.345 | 0.345 |
| CRV13AT CRV15AT CRV17AT | 1560-478 | 0.658 | 0.658 | 0.658 |
Aires
| Unit Model | Compressor Part Number/Model | Rating Of Compressor Windings (Ω)* | ||
|---|---|---|---|---|
| U - V | V - W | U - W | ||
| CRS10AS CRS13AS CRS15AS CRS17AS | CRS1002 | 1.062 | 1.062 | 1.062 |
| CRS13AT CRS15AT CRS17AT | CRS1302 | 0.63 | 0.63 | 0.63 |
*Resistance value at 25°C ambient Temperature
04.07. Condenser Fan Winding Resistance
04.07.01. Advance R-410A (Three Speed Motor)
| Unit Model | Fan Part Number | Rating Of Fan Windings (Ω)* | |||
|---|---|---|---|---|---|
| Black and Blue | Blue and Brown | Black and Brown | Any colour and earth | ||
| CRV140S CRV160S CRV180S CRV160T CRV180T | 2505-141 | 97 | 143 | 240 | Open circuit |
| CRV210T CRV240T | Brown and Black | Brown and Blue | Black and Blue | Any colour and earth | |
| 2505-130 | 68.2 | 38.6 | 30.1 | Open circuit | |
04.07.02. Advance R-32 (Variable Speed Motor)
| Unit Model | Fan Part Number | Rating Of Fan Windings (Ω)* |
|---|---|---|
| CRV13AS CRV15AS CRV17AS CRV13AT CRV15AT CRV17AT | 2505-143 | N/A |
04.07.03. Aires (Variable Speed Motor)
| Unit Model | Fan Part Number | Rating Of Fan Windings (Ω)* | |||
|---|---|---|---|---|---|
| Black - Red | Black - White | Black - Yellow | Black - Blue | ||
| CRS10AS CRS13AS CRS13AT CRS15AS CRS15AT CRS17AS CRS17AT | CRS1020 CRS1319 CRS1517 | 6.5 - 8.5 | 3.5 - 5.5 | 0.18 - 0.22 | 6.5 - 10 |
*Resistance value at 25°C ambient Temperature
04.07.04. Condenser Fan Voltage Testing
Diagrams illustrate fan motor components and wiring. The tables provide control voltage, fan data wire color, fan data output, and PCB JST XHP-6 Pin details for Advance R-32 and Aires units.
| ADVANCE R-32 | |||
|---|---|---|---|
| Control Voltage | Fan Data Wire Colour | Fan Data Output | PCB JST XHP-6 Pin |
| 2 - 10 VDC | White Red Yellow Blue | Fan Feedback +10VDC Supply 0-10 VDC OV Ground | 1 2 3 4 |
| 1.5 - 10 VDC | Yellow - Blue | UNO Pro to Fan | 5 6 |
| ARIES | |||
|---|---|---|---|
| Control Voltage | Fan Data Wire Colour | Fan Data Output | PCB JST XHP-6 Pin |
| 310VDC | Red Black White Yellow Blue | Vm Ground Vcc Vsp RPM Feedback | 1 2 3 4 5 6 |
04.08. Other Component Coil Resistances
| Component Name | Resistance Value (KΩ)* |
|---|---|
| Reversing valve | 2.03 |
| Crankcase Heater (For Advance R-410A and R-32 only) | 1.56 |
*Resistance value at 25°C Ambient Temperature
04.09. Choke Reactor resistance
| Unit Model | Resistance Between Wires / Terminals (Ω)* | |
|---|---|---|
| Advance R-410A | CRV140S CRV160S CRV180S CRV160T CRV180T CRV210T CRV240T | 16 - 18 16 - 18 16 - 18 16 - 18 16 - 18 16 - 18 16 - 18 |
| Advance R-32 | CRV13AS CRV15AS CRV17AS CRV13AT CRV15AT CRV17AT | 2.9 2.9 2.9 16 - 18 16 - 18 16 - 18 |
| Aires | CRS10AS CRS13AS CRS15AS CRS17AS CRS13AT CRS15AT CRS17AT | 2.4 2.4 2.4 2.4 2.4 2.4 2.4 |
*Resistance value at 25°C ambient Temperature
04.10. EEV Resistance
| Resistance Between Wires | Resistance Value (Ω)* |
|---|---|
| Orange - Grey | 46 ± 3 Ω |
| Red - Grey | 46 ± 3 Ω |
| Yellow - Grey | 46 ± 3 Ω |
| Black - Grey | 46 ± 3 Ω |
*Resistance value at 20°C Ambient Temperature
04.11. Temperature-Resistance Table For Sensors
Tables provide resistance values (kΩ) for Ambient/Outdoor Coil/Indoor Coil/Suction Temperature Sensors and Discharge Line Temperature Sensors across a range of temperatures (°C) from -20°C to 120°C.
04.12. High Pressure and Low Pressure Transducer
A diagram shows the HP OR LP Sensor/Transducer with connections for Ground, Output Voltage, and Control Voltage. It specifies Control Voltage as 5.0 ± 0.2 VDC and Output Voltage as 0.5 TO 4.5 VDC.
04.13. Advance Pressure-Voltage Table For Pressure Transducers
A table lists pressure (Kpa) and corresponding output voltage (VDC) for both High Pressure Transducer and Low Pressure Transducer for Advance units.
04.14. Aires Pressure-Voltage Table For Pressure Transducers
A table lists pressure (Kpa) and corresponding output voltage (VDC) for both High Pressure Transducer and Low Pressure Transducer for Aires units.
05. VSD Troubleshooting
05.01. Error Code Process
Compressor Will Note Start Before Error Shows:
- Check wiring and connections from VSD to all components using wiring diagram.
- Check Power from EMI Filter Board to VSD. (Remedy: Replace EMI Filter Board)
- Check Compressor Windings and Resistance to Earth Section 04.06. (Remedy: Replace Compressor)
- Test Choke Reactor Resistances Section 04.08. (Remedy: Replace Choke Reactor)
- Remove Condenser Fan and check if compressor will start. (Remedy: Test Condenser Fan Section 04.06.04, Replace VSD)
Compressor Runs or Starts Before Error Shows:
- Check wiring and rotation of compressor connections using wiring diagram.
- Test Compressor Windings Section 04.05. (Remedy: Replace compressor)
- Test Compressor Current whilst running. (Remedy: Check refrigerant charge and input voltages, Replace Compressor)
- If E60 check discharge temp if open circuit (120 degrees) Section 07. Fault Code Troubleshooting (p. 32). (Remedy: Check refrigerant charge, Replace Sensor)
- Check refrigerant and pressures for blockages or large compression ratio and other operating conditions. (Remedy: Replace VSD)
06. Fault Codes
06.01. Advance
A table lists fault codes (E01-E60) for Advance units, categorized by controller (NEO Wall Controller, LR7-1/LC7-2 Wall Controller, Outdoor Unit CPU), source (IDU, ODU, VSD), and provides a function/fault description.
06.02. Aires
A table lists fault codes (E01-E63) for Aires units, categorized by controller (NEO Wall Controller, LR7-1/LC7-2 Wall Controller, Outdoor Unit CPU), source (IDU, ODU, VSD), and provides a function/fault description.
07. Fault Code Troubleshooting
This section details specific fault codes, their descriptions, possible causes, and remedies.
| Fault Code | Description | Possible Causes | Remedies |
|---|---|---|---|
| E03 Indoor Room Temp. Sensor Error | E03 will be displayed on all connected wall controls every time the unit is switched on. | Faulty wall sensor or cable | Replace faulty sensor or cable |
| E04 Indoor Coil In Temp. Sensor Error | No preheat on start up (heating mode only), indoor fan will come on straight away. After de-ice, indoor fan will start after 30 seconds. E04 will be displayed every time it is switched on. | Indoor coil sensor is open or short circuit. | Replace indoor sensor |
| E06 High Discharge Temperature | The compressor discharge temperature (Cdt) has exceeded 138 °C and the system has been stopped. When the temperature has normalised to 80°C or 8 minutes delay has been finished, the controller will attempt to return to normal conditions. | Under charged with refrigerant. | Check for refrigerant leaks and repair. |
| E07 Outdoor Coil Temp. Sensor Error | Outdoor fans will operate on high speed only (while unit is running). E07 will be displayed every time the system is switched on. | Outdoor coil sensor is open or short circuit. Faulty sensor. | Replace outdoor coil sensor Check the sensor resistance. |
| E08 Discharge Temp. Sensor Error | The reading of the discharge temperature sensor (Cdt) is not within the specified sensor range of -60 °C to +200°C. | Discharge temperature sensor is open or short circuit. Faulty sensor. | Replace discharge temperature sensor. Check the sensor resistance. |
| E09 LP Switch Tripped | Low Pressure Control will cut out the system (i.e. stop the compressor and fans) if a pressure less than 165kPa is detected. Compressor stops for 5 minutes for the 1st and 2nd trip. If the low pressure switch trips out three times in a row, then the unit will remain off for 15 minutes before attempting to re-start. For the system to restart after a Low Pressure cut out, the pressure switch needs to detect a pressure greater than 330kPa. | Insufficient airflow over indoor coil during cooling operation Undercharged with refrigerant Insufficient airflow over outdoor coil during heating operation Blockage in refrigeration system Dirty filter | Check indoor fan operation to ensure sufficient airflow is flowing across the indoor coil. Check for refrigerant leaks and repair. Check for dirty outdoor coil and inspect outdoor fan operation. Remove blockage from refrigeration system. Clean Filter. |
| E10 LP Sensor Error (open/short circuit) | The reading of the suction pressure transducer is not within the specified sensor range. | Faulty wiring or defective transducer. | Replace the transducer. Correct the wiring. |
| E11 HP Switch Tripped | High Pressure Control will cut out the system (i.e. stop the compressor and fans) if a pressure greater than 4502kPa is detected. Compressor stops for 5 minutes for the 1st and 2nd trip. If the high pressure switch trips out three times in a row, then the unit will remain off for 15 minutes before attempting to re-start. For the system to restart after a High Pressure cut out, the pressure switch needs to detect a pressure less than 3509kPa. | Insufficient airflow over indoor coil during heating operation Overcharged with refrigerant Insufficient airflow over outdoor coil during cooling operation Blockage in refrigeration system Dirty filter | Check indoor fan operation to ensure sufficient airflow is flowing across the indoor coil Check for refrigerant leaks and repair. Check for dirty outdoor coil and inspect outdoor fan operation. Remove blockage from refrigeration system. Clean Filter. |
| E12 HP Sensor Error (open/ short) | The reading of the condenser pressure transmitter is not within the specified sensor range. | Faulty wiring or defective transducer. | Replace the transducer. Correct the wiring. |
| E13 VSD Fault Signal | E13 will be displayed on the ODB when the VSD sends a fault signal to the ODB. | VSD overheating. Incorrect supply voltage Incorrect or loose VSD Wiring VSD HP loop open circuit (Advance R-410A only) | Ensure proper airflow/ cooling over the drives heat-sink. Ensure line voltage is > 187 VAC. Check system for lose connections or hot joints. Ensure wiring is correct and screws and terminals are tight. Ensure that the drives HP bypass is connected. |
| E15 Communication Error Between ODU to VSD | No communication data received for 20 seconds. E15 (With no light on the drive) | Check modbus communication cable connection. Power cycle the drive. Drive DC -P wire is not connected (orange cable wire on cap. Board, DC OUT). | Make sure the communication cable is connected correctly. |
| E18 Suction Temp. Sensor Error (Open/short circuit) | The reading of the suction temperature sensor (Sst) is not within the specified sensor range. | Suction temperature sensor is open or short circuit. Faulty sensor. | Replace suction temperature sensor. Check the sensor resistance. |
| E22 Ambient Temp. Sensor Error (Open/ short circuit) | The reading of the ambient temperature sensor is not within the specified sensor range. | Ambient temperature sensor is open or short circuit. Faulty sensor. | Replace ambient temperature sensor. Check the sensor resistance. |
| E26 VSD Supply Over Current | The drive has encountered an over current event and has stopped operation. | An over current can be triggered by low voltage. Check if the compressor is operating within specified pressure limits. Faulty drive. | Rectify low voltage power supply. Find the root cause for not operating the compressor in the specified limits. Replace drive if the problem still persists. |
| E27 VSD Supply Over Voltage | The drive has encountered an over voltage event. | Measure the input voltage to the drive. It should not be more than 575VAC. Check if the compressor is operating within specified pressure limits. | Input voltage should be rated value range. Find the root cause for not operating the compressor in the specified limits. |
| E28 VSD Temperature High | The drive has encountered an over temperature condition and has stopped operation. | Verify proper airflow over the heat-sink of the drive. Check if the compressor is operating within specified pressure limits. Check the mounting screws on the drive, If the problem, still persists replace the drive. | Remove any obstructions. Find the root cause for not operating the compressor in the specified limits. Make sure they are tight. |
| E29 VSD Low Supply Voltage | The drive has encountered an under-voltage event. | Measure the input voltage to the drive. It should not drop below 295VAC. Check if the compressor is operating within specified pressure limits. | Input voltage should be rated value range. Find the root cause for not operating the compressor in the specified limits. |
| E30 VSD Trip Lock | Certain faults have a trip limit. | VCD Drive trips lock because of multiple errors. Refer to Outdoor Board history to diagnose more for related error code. | Reset the power supply. |
| E41 VSD DC Link Voltage Low | The drive has encountered an DC bus voltage low. | Check the AC power supply. Check if the compressor is operating within specified pressure limits. | Make correct supply voltage. Find the root cause for not operating the compressor in the specified limits or restart the drive again. |
| E42 and E45 Envelope Protection Error | As the compressor starts, it will wait until the compressor envelope control start delay has expired. Once the delay has expired, only then will the compressor start to track the floating point which is defined by HP/LP saturation temperature with respect to the selected compressor envelope (the compressor envelope has been divided in to the four parts – Extreme low evaporating pressure, High compression ratio, High condensing pressure, Low compression ratio. In the case of when the compressor operates outside the envelope boundaries, there is an allowable time of which the compressor may continue to operate – these time restrictions are tabulated below. The compressor will turn off if the allowable time-out expires. After 180 seconds, the UNO controller will auto reset according to the respective error code and start again to user define mode. System can trip on any of the four envelope protection error code: E42: Unit will trip on this error code if compressor is running outside the envelope boundary on extremely low evaporating pressure side for 20sec. E43: Unit will trip on this error code if compressor is running outside the envelope boundary on high compression ratio side for 3sec. E44: Unit will trip on this error code if compressor is running outside the envelope boundary on high condensing pressure side for 3sec. E45: Unit will trip on this error code if compressor is running outside the envelope boundary on low compression ratio side for 90sec. | Same as E09 Insufficient airflow over indoor coil during heating operation Under or overcharged with refrigerant Same as E11 System may be running outside the operating limits. Outdoor fan relay might be stuck on the high speed. | Same as E09 Check indoor fan operation to ensure sufficient airflow is flowing across the indoor coil Amend gas charge until charge is correct Same as E11 Make sure system should not be operated outside the operating range. Replace the outdoor board. |
| E47 Compressor Motor torque has exceeded its limits Torque Limit Error | Compressor running outside the operating limits. | Airflow across the indoor or outdoor coil is not proper. Overcharged with refrigerant. | Amend gas charge until charge is correct |
Fault Code Troubleshooting (Continued)
| Fault Code | Description | Possible Causes | Remedies |
|---|---|---|---|
| E50 Outdoor Board Configuration Error | UNO Board has not been configured. | Outdoor board is not configured. | Configured the outdoor board correctly. |
| E51 Communication Error Between ODU to VSD | Communication between outdoor and indoor board. Outdoor board has not been configured correctly. | Faulty outdoor and indoor board or cable. Outdoor board is not configured. | Replace the faulty board. Configured the outdoor board correctly. |
| E52 Fault IDU - Wall Control Communication Error | Communication error between wall control and indoor board. | Faulty wall controller or cable Conflicting address with controller assignment or two controls have the same assignment number ICUNO-MOD to Outdoor Board Communication Fault. Incorrect Control Mode set on Outdoor Board | Replace faulty wall controller or cable Re-assign controllers correctly Replace faulty ICUNO-MOD Ensure correct control mode is set. |
| E55 Communication Error Between BMS to ODU | No Master Wall Control (C-1) is detected. System will lock out until a C-1 assignment is detected. | Master Controller (C-1) Faulty Connected controller/s have not been assigned as C-1 | If an additional Wall Control (C-2 or C-3) is available, remove the faulty Master controller and re-assign one of the available controllers to C-1. Re-assign a connected controller to C-1. |
| E56 No Master Wall Control Detected | |||
| E60 VSD Compressor Phase Over Current | Compressor Phase Over Current | Check the U/V/W connections on drive side. Check the compressor motor windings Check if the compressor is operating within specified pressure limits. Sensor on Drive not reading properly | Make them correct. Find the root cause for not operating the compressor in the specified limits. Replace Drive. |
| E62 VSD DC Bus Over Voltage | DC Bus Over Voltage | Check the DC bus voltage if it is > 800VDC. Check if the compressor is operating within specified pressure limits. | Find the root cause for not operating the compressor in the specified limits. |
| E63 VSD DC Bus Under Voltage | DC Bus Under Voltage or Incoming phase power loss Phase loss (filter to VSD). | Check the DC bus voltage if it is < 300VDC. Check if the compressor is operating within specified pressure limits. | Find the root cause for not operating the compressor in the specified limits. |
| E70 VSD Lost Rotor Position | Lost Rotor Position or Phase lost to compressor. | Check the U/V/W connections on drive side. Check the compressor motor windings Check if the compressor is operating within specified pressure limits. System over charge | Make them correct. Find the root cause for not operating the compressor in the specified limits. Make it correct. |
| E71 VSD Motor Temp Sensor Error | AC Input Current Fold Back Timeout | Check if the line voltage if it is < 187VAC Check if the compressor is operating within specified pressure limits. | Find the root cause for not operating the compressor in the specified limits. |
| E76 VSD Power Module Temp. Fold Back Timeout | Power Module Temp. Fold Back Timeout | Faulty drive Verify proper airflow over the heat-sink of the drive. Check if the compressor is operating within specified pressure limits. Check the mounting screws on the drive, If the problem, still persists replace the drive. | Replace drive. Remove any obstructions. Find the root cause for not operating the compressor in the specified limits. Make sure they are tight. |
| E78 VSD Auto Config Communication Timeout | Auto Config Communication Fault Timeout. Baud rate or Parity of the system controller not matching with drive. | Drive is not configured. | Replace the drive. |
| E82 VSD Power Module Temp High | Power Module Temp. High | Verify proper airflow over the heat-sink of the drive. Check if the compressor is operating within specified pressure limits. Check the mounting screws on the drive, If the problem, still persists replace the drive. | Remove any obstructions. Find the root cause for not operating the compressor in the specified limits. Make sure they are tight. |
| E85 Communication Error in VSD Between Comms to DSP | COM MCU and DSP Communication Lost | Check mod-bus communication cable connections. | Refer wiring diagram & correct it. |
| E86 Compressor Phase Current Imbalance | Compressor Phase Current Imbalance | Faulty drive Check the U/V/W connections on drive side. Check the compressor motor windings Check if the compressor is operating within specified pressure limits. System over charge | Replace the drive. Make them correct. Find the root cause for not operating the compressor in the specified limits. Make it correct. |
| E88 VSD Micro Electronic or EEPROM Error | Microelectronic Fault / EEPROM fault. DSP self-check error. | Drive configure issue. Faulty drive. | Restart the drive and fault should go away. Replace the drive. |
| E90 VSD Compressor Model Configuration Error | Compressor Model Configuration Error | Drive configuration issue. | Replace the drive. |
| E95 VSD Power Module Temp Low or Sensor (Open or short circuit) | Power Module Temp. Low or Sensor Open fault | Verify proper airflow over the heat-sink of the drive. Check if the compressor is operating within specified pressure limits. Check the mounting screws on the drive, If the problem, still persists replace the drive. | Remove any obstructions. Find the root cause for not operating the compressor in the specified limits. Make sure they are tight. |
