53
Troubleshooting
25 CN13 Low pressure overrun 78 78
Switch off the compressor
of the system A. If this fault
occurs twice, switch off and
give an alarm.
26 CN14 Low pressure overrun 2 7A 7A
Switch off the compressor
of the system B. If this fault
occurs twice, switch off and
give an alarm.
27 TH4、TH9 Coil superheating 98 98 Switch off
2
28 TH7
The ambient temperature exceeds the
working range
87 87 Switch off
29 CN29
Communication fault between control panel
and centralized controller
ED None Switch off
3
30 CN4/XP1
Communication fault between single unit
controller and mainboard
EE None Switch off
Fault Code Table for Main Control Panel
Note: the faults in this table are only displayed on the single unit controller and the centralized
controller.
Note 1: when this fault occurs, switch off all compressors. The water pump will continuously
operate. Lock “
antifreezing locking time of plate type heat exchanger for refrigeration
unit
”. the fault is permitted to be manually reset only when the water outlet
temperature or the suction temperature is recovered to the normal state,
Note 2: for CXAJ065/045 unit, there are no TH8, TH9, TH10, TH11, CN14, IND3 and IND9 inputs
and relevant alarm codes.
Note 3: this alarm code will be displayed only when “module control” is selected.
Note 4: this alarm code will be displayed only when “module control” is selected and it is a
modular host unit.
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