Midea Package Air-cooled Modular Chiller Error Codes
Code Trouble:
| Error Codes | Cause |
|---|---|
| E0 | Water-flow detection error (the third time) |
| E1 | Power phases sequence failure |
| E2 | Communication failure |
| E3 | Total outlet water Temperature sensor failure (available for main unit) |
| E4 | Outlet water temperature sensor in double-pipe heat interchanger error |
| E5 | Pipe temperature sensor in condenser A error |
| E6 | Pipe temperature sensor in condenser B error |
| E7 | Outdoor Temperature sensor failure |
| E8 | Error of the Air Exhaust Temp. Sensor at Digital Compressor |
| E9 | Water-flow check trouble(wire controller and control board can recover automatically when the trouble is displayed for the first and second times |
| EA | Main unit detect that auxiliary unit’s quantity have decreased. |
| Eb | Freeze-proof temperature sensor 1 in double-pipe heat interchanger error |
| EC | Wire controller can not search the modules on line |
| ED | Wire control and module unit communication error |
| Ed | 1-hour consecutive 4-times PE protection |
| EE | Wire control and computer communication error |
| EF | Inlet water temperature sensor error |
| P0 | System A high-pressure protection or discharge gas temperature protection |
| P1 | System A low-pressure protection |
| P2 | System B high-pressure protection or discharge gas temperature protection |
| P3 | System B low-pressure protection |
| P4 | System A current protection |
| P5 | System B current protection |
| P6 | System A Condenser high-temperature protection |
| P7 | System B Condenser high-Temperature protection |
| P8 | Digital compressor discharge Temperature protection, when it is above 125℃ |
| Pb | System anti-freeze protection |
| PE | Low-temperature protection of double-pipe heat interchanger |
| F1 | Eeprom failure |
| F2 | Failure of reduction of wired controller number at parallel connection of multiple wired controller (reserved) |
| CP | Anti-freeze protection of plate heat exchanger for 5/7kW |
| CL | Protection when temperature difference between inlet & outlet water in cooling mode is too large for 5/7kW. |
| CH | Protection when temperature difference between inlet & outlet water in heating mode is too large for 5/7kW |
| C8 | Water flow switch protection malfunction |
| C0 | Temperature sensor malfunction of plate heat exchanger for 5/7kW. |
| d8 | Remote control |
| HH | Inlet water temperature sensor malfunction for 5/7kW models. |
Troubleshooting and Solutions
Troubles: Over high air discharge pressure(Cooling operation).
Possible reasons:
- Air or other non-condensing gas still in the system.
- Fins in the condenser are dirty or foreign substance blocking fins.
- Insufficient chilling air volume or condenser fan error.
- Excessive high air suction pressure.
- Excessive refrigerant charging volume.
- Over high ambient temperature.
Solutions:
- Discharge gas from refrigerant charging inlet. Re-vacuum the system if necessary.
- Clean condenser fins.
- Check and repair the condenser fan, recover the normal operation.
- See “Excessive high air suction pressure”.
- Discharge the excessive refrigerant.
- Check ambient temperature.
Troubles: Over low air discharge pressure (Cooling operation).
Possible reasons:
- Surrounding temperature is lower.
- Refrigerant leak or insufficient.
- Low suction pressure.
Solutions:
- Measure the surrounding temp.
- Leak-hunting or recharging.
- Refer to the “low suction pressure”.
Troubles: Over high air suction pressure (Cooling operation).
Possible reasons:
- Refrigerant over-charged.
- High temperature of the inlet chilled-water.
Solutions:
- Discharge the additional refrigerant.
- Check the heat insulation of water pipeline.
Troubles: Compressor stops because of freeze-proof protection
Possible reasons:
- Insufficient chilling water flow volume.
- Gas still in water loop.
- Thermal resistor error.
Solutions:
- Error comes from pump or flow-type water volume control. Check and repaired or replace a new one.
- Discharge air.
- Upon error have been confirmed, please replace a new one.
Troubles: Compressor can‟t start.
Possible reasons:
- Over current relay trip up, fuse burnt out.
- Control circuit without power though.
- High voltage or low voltage protection.
- Coils in contactor are burnt out.
- Wrong connection of phase sequence.
- Water system error and flow type volume controller short connection.
- Error signal delivered from wired controller.
Solutions:
- Replace damaged assembly.
- Check the wring of control system.
- Reference to mention in above the parts of air suction and discharge pressure error.
- Replace damaged assembly.
- Re-connect and adjust the any 2 wires among 3 phases.
- Check water system.
- Find out the error type and carry out the corresponding measure to settle.
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