Trane CXAJ series - Page 51

51
Troubleshooting
17 fault input alarm switches, 1 fault output alarm switch and 1 operating status output switch are arranged for the
double-compressor system.
No. Input Port Fault Description Type Code Fault Handling
1 TH1
Short circuit / open circuit of water inlet
temperature sensor
A SE Turn off all external devices
2 TH2
Short circuit / open circuit of water
outlet temperature sensor
A SL Turn off all external devices
3 TH3
Short circuit / open circuit of suction
temperature sensor 1
A Sd Turn off all external devices
4 TH4
Short circuit / open circuit of defrosting
temperature sensing sensor 1
A S1 Turn off all external devices
5 TH5
Short circuit / open circuit of defrosting
temperature sensing sensor 2
A S2 Turn off all external devices
6 TH6
Short circuit / open circuit of suction
temperature sensor 2
A S3 Turn off all external devices
7 OVHT/HP2 High pressure alarm of compressor 2 E H2
Only switch off the compressor
2
8 FLOW Lack of water flow D FL Turn off all external devices
9 OV-PUMP Overload of water pump 1 B OP Turn off all external devices
10 OV-FAN Overload of fan B OF Turn off all external devices
11 OV-COMP1 Overload of compressor 1 C C1
Only switch off the compressor
1
12 OV-COMP2 Overload of compressor 2 E C2
Only switch off the compressor
2
13 HP1 High pressure voltage of compressor 1 C H1
Only switch off the compressor
1
14 LP1 Low pressure voltage of compressor 1 C L1
Only switch off the compressor
1
15 FREZ/LP2 Low pressure voltage of compressor 2 E L2
Only switch off the compressor
2
16 / / /
Low refrigeration water outlet
temperature
D E3
Switch off the compressor. The
auxiliary heater for the water
pump operates.
17 / / / Low suction temperature D E4
Switch off the compressor. The
auxiliary heater for the water
pump operates.