23
Fault 1AA
Electronic expansion valve Electric Drive Circuit
- Refrigerant Circuit 2:
CMR
1) Electronic expansion valve wiring
2) Defective UCM
3) Defective Electronic expansion valve
4) Defective Electronic expansion valve relay
Fault 1Ad
Memory Error Type I:
IFW
- Non Volatile Random Access Memory
[NOVRAM}
problem, unit is placed on default setting operating
Fault 1AE
Low Differential Pressure - Circuit 1:
CMR
- Delta P< 2,8bar during more than 2 minutes
Fault 1AF
Low Differential Pressure - Circuit 2:
CMR
- Delta P< 2,8bar during more than 2 minutes
Fault 1b2
Severe Phase Unbalance - Compressor A:
CMR
- Phase imbalance >30%, check current transformer
and unit power supply
Fault 1b3
Severe Phase Unbalance - Compressor B:
CMR
- Phase imbalance >30%, check current transformer
and unit power supply
Fault 1b4
Severe Phase Unbalance - Compressor C:
CMR
- Phase imbalance >30%, check current transformer
and unit power supply
Fault 1b5
Severe Phase Unbalance - Compressor D:
CMR
- Phase imbalance >30%, check current transformer
and unit power supply
Fault 1b6
Compressor Overload Setting - Compressor A:
IFW
- Check setting of compressor overload
Fault 1b7
Compressor Overload Setting - Compressor B:
IFW
- Check setting of compressor overload
Fault 1b8
Compressor Overload Setting - Compressor C:
IFW
- Check setting of compressor overload
Fault 1b9
Compressor Overload Setting - Compressor D:
IFW
- Check setting of compressor overload
Fault 1bA
Phase Unbalance - Compressor A:
CMR
- Phase imbalance >15%
Fault 1bb
Phase Unbalance - Compressor B:
CMR
- Phase imbalance >15%
Fault 1bC
Phase Unbalance - Compressor C:
CMR
- Phase imbalance >15%
Fault 1bd
Phase Unbalance - Compressor D:
CMR
- Phase imbalance >15%
Fault 1bE
Winding Temperature - Compressor A:
CMR
- Winding temperature > 105°C
Fault 1bF
Winding Temperature - Compressor B:
CMR
- Winding temperature > 105°C
Fault 1C0
Winding Temperature - Compressor C:
CMR
- Winding temperature > 105°C
Fault 1C1
Winding Temperature - Compressor D:
CMR
- Winding temperature > 105°C
