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Operational and connection information
Fault Code Table
Fault Code
Fault
3
Enter water Temperature Thermistor (EWT)
4
Actual Refrigerant Temperature Thermistor BPHE
5
Outdoor Air Thermistor of GMC
6
Loss communication to NUI
7
NUI Room Thermistor
8
Unit Capacity Mismatch
9
Flow Switch error / Water Pump
10
EEPROM Corrupt
11
OAT high than Stop Heat
12
OAT low than Stop Cool
13
Loss Comm to RS485 (system configuration type=6)
14
Loss of Signal From CDU
15
Leaving Water Temperature Thermistor (LWT)
17
CDU Outdoor Air Thermistor (TO)
18
G-Tr short circuit protection
20
Position Detection Circuit Error
21
Current Sensor Error
22
Outdoor Heat Exchange Sensor (TE) / (TS)
23
Discharge Temperature Sensor (TD)
24
Outdoor Fan Error
26
Other Outdoor Error
27
Compressor Lock
28
Discharge Temperature Error
29
Compressor Breakdown
30
Low Pressure Switch
31
High Pressure Release
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