Inverter Refrigerator Testing Instrument Tester

Introduction

This manual provides comprehensive instructions for the safe and effective use of the Bewinner Inverter Refrigerator Testing Instrument Tester. This universal tool is designed for diagnosing and repairing faults in inverter refrigerators and air conditioning systems, offering a wide range of testing capabilities for various components. It features a clear display, adjustable parameters, and buzzer alarms for fault indications. Please read this manual thoroughly before operation to ensure proper usage and to prevent damage to the instrument or the appliances being tested.

Product Overview

The Inverter Refrigerator Testing Instrument Tester is a multifunctional device equipped with a clear digital screen for voltage and current display, and a frequency adjustment knob. It provides various connection points for different testing scenarios and operates on a stable internal system. The instrument is designed for ease of use with intuitive button controls and 16 wiring terminals to ensure stable and convenient connections.

Control Panel Features (Refer to Figure 3)

1. Frequency Adjustable Knob
2. Voltage Display
3. Current Display
4. Frequency Conversion Compressor Inspection Indicator
5. Single Line Frequency Conversion Board Detection Indicator
6. Pulse Solenoid Valve Detection Indicator
7. Main Board To Solenoid Valve Output Detection Indicator
8. Constant Frequency Compressor Power Supply Observation Current Indicator
9. Double Wire Frequency Conversion Board Detection Indicator
10. 6 Pin Electric Valve Detection Port
11. 5 Pin Electric Valve Detection Port
12. Electric Valve Stuck Repair Function
13. Home Air Conditioning Electronic Expansion Valve Drive Detection Port
14. Single and Double Damper Detection Port
15. Air Door Heating Wire Power Supply Output
16. 3 Wire Fan Detection Port
17. 4 Wire Fan Detection Port

Specifications

Setup

Before operating the testing instrument, ensure all connections are secure and correct for the specific test you intend to perform. Always ensure the appliance being tested is disconnected from its main power source before making any connections to the tester.

1. Power Connection: Connect the instrument to a suitable power outlet using the provided power cord. The instrument supports both 110V and 220V versions (refer to your specific model).
2. Identify Test Points: Refer to Figure 3 to identify the appropriate wiring terminals and control buttons for your desired test.
3. Connect Test Leads: Use the included test leads and alligator clips to connect the instrument to the component or circuit you wish to test. Ensure polarity is correct where applicable.
4. Initial Power On: Turn on the instrument using the main power switch. The screen should illuminate, displaying initial voltage and current readings.

The instrument is designed for stable performance and high reliability, utilizing an internal operating system for its functions.

Operating Instructions

This instrument offers a variety of testing functions. Always ensure the appliance is disconnected from its main power source before making any connections to the tester. Refer to Figure 3 for general control panel layout and Figure 4 for specific test scenario connections.

Specific Test Scenarios (Refer to Figure 4)

1. Mainboard to Variable Frequency Board Output Signal Detection (Multimeter Interface): Connect the mainboard output to the designated multimeter interface on the tester to verify signal integrity.
2. 2K, 5K, 10K Temperature Probe Detection: Connect various temperature probes to the specified ports to test their functionality and accuracy.
3. Compressor Short Circuit and Other Faults Buzzer Alarm: The instrument will sound a buzzer alarm if it detects a compressor short circuit or other critical faults during testing.
4. Air Conditioning Three Wire Fan Variable Frequency Motor Drive: Connect and test 3-wire variable frequency fan motors commonly found in air conditioning units.
5. Range Hood Three Wire Variable Frequency Motor Drive: Connect and test 3-wire variable frequency motor drives used in range hoods.
6. Compressor Cylinder Jamming Instrument: This function attempts to unjam a compressor cylinder. The instrument will make three attempts to start the compressor. If it cannot start after these attempts, a buzzer alarm will sound, indicating a persistent jam.

General Testing Procedures

• Inverter Compressor Detection: Connect the inverter compressor to the designated terminals. Use the frequency adjustable knob (Feature 1, Figure 3) to vary the frequency and observe the voltage and current displays (Features 2 & 3, Figure 3) to inspect the compressor's operation.
• Single Line Inverter Board Detection: Connect the single line inverter board to the appropriate terminals for diagnostic checks.
• Pulse Solenoid Valve Detection: Connect the pulse solenoid valve for testing its functionality.
• Main Board to Solenoid Valve Output Detection: Verify the output signals from the mainboard to the solenoid valve.
• 6 Pin and 5 Pin Electric Valve Detection: Connect 6-pin or 5-pin electric valves to their respective terminals (Features 10 & 11, Figure 3) for diagnostic checks.
• Electric Valve Stuck Repair: This function (Feature 12, Figure 3) can be used to attempt to free a stuck electric valve. Follow the instrument's prompts and safety guidelines.
• Single and Double Damper Detection: Test the operation of single and double dampers using the dedicated port (Feature 14, Figure 3).
• Air Door Heating Wire Power Supply: The instrument provides power for testing air door heating wires via Feature 15 (Figure 3).
• Household Air Conditioning Electronic Expansion Valve Drive Detection: Specifically designed for testing electronic expansion valves in home air conditioning units (Feature 13, Figure 3).
• 3 Wire Fan Detection & 4 Wire Fan Detection: Connect 3-wire or 4-wire fans to their respective ports (Features 16 & 17, Figure 3) for testing.

Compressor Unjamming Procedure

This instrument can be used to try to repair a slight compressor jam caused by overheating. Compressor cylinder damage and overheating caused by expansion can sometimes be restored to normal use after a strong release. The compressor of the cylinder will be driven three times by the instrument in an attempt to release the compressor cylinder caused by overheating. If the compressor does not start after three attempts, the buzzer will alarm, indicating the jam persists.

Examples of Testable Motors

The instrument supports testing of various motor types, including:

• Washing machine 3-wire permanent magnet synchronous motor drive
• Washing machine 3-wire DC brushless motor drive
• Washing machine 3-phase synchronous motor instantaneous drive
• Air conditioning compressor (small)
• Air conditioning compressor pseudo load motor drive (1800W)

Maintenance

Proper maintenance ensures the longevity and accuracy of your testing instrument.

• Cleaning: Wipe the instrument with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no liquids enter the device.
• Storage: Store the instrument in a cool, dry place away from direct sunlight and extreme temperatures. Keep it in its original packaging or a protective case when not in use.
• Cable Care: Inspect all test leads and cables regularly for signs of wear or damage. Replace any damaged cables immediately to prevent electrical hazards and ensure accurate readings.
• Avoid Drops: Handle the instrument with care to avoid dropping it, which can damage internal components.

Troubleshooting

This section addresses common issues you might encounter during the operation of your testing instrument.

• Instrument Does Not Power On:
  • Check if the power cord is securely connected to both the instrument and a functional power outlet.
  • Ensure the main power switch is in the 'ON' position.
• No Reading on Display:
  • Ensure the test leads are correctly and securely connected to both the instrument and the component being tested.
  • Verify the component being tested is receiving power or is in a state that allows for measurement.
• Buzzer Alarm Sounds:
  • A buzzer alarm indicates a fault, such as a compressor short circuit or failure to unjam a compressor after multiple attempts.
  • Immediately disconnect power and investigate the connected appliance for the indicated fault.
• Inaccurate Readings:
  • Check for loose or corroded connections.
  • Ensure the correct test mode is selected for the measurement being taken.
  • Verify the test leads are not damaged.

User Tips

Maximize your experience and ensure safety with these helpful tips:

• Always double-check your connections before powering on the instrument or the appliance under test to prevent damage. Incorrect wiring can lead to instrument or appliance failure.
• Familiarize yourself with the annotated diagrams (Figures 3 and 4) to quickly identify the correct ports and controls for each specific test.
• When testing compressors, pay close attention to the current observation to detect anomalies that might indicate an impending failure or an existing issue.
• For electric valve repair, patience is key. If the valve remains stuck after several attempts using the instrument's function, further mechanical inspection or replacement may be required.
• Keep the work area clean and well-lit to ensure clear visibility of connections and readings.

Warranty and Support

For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.