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Troubleshooting
Fault Alarm Table for Controller (N Type)
If the single unit controller and the control panel are faulty, the code “EE” will be
displayed.
13 fault input alarm switches and 1 fault output alarm switch are arranged for the single-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
A S1 Turn off all external devices
5 OVHT/HP2 Overload of electrical heater B H2 Turn off all external devices
6 FLOW Lack of water flow D FL Turn off all external devices
7 OV-PUMP Overload of water pump B OP Turn off all external devices
8 OV-FAN Overload of fan B OF Turn off all external devices
9 OV-COMP1 Overload of compressor 1 C C1
Only switch off the compressor
1
10 HP1 High pressure alarm of compressor 1 C H1
Only switch off the compressor
1
11 LP1 Low pressure alarm of compressor 1 C L1
Only switch off the compressor
1
12 / / /
Low refrigeration water outlet
temperature
D E3
Switch off the compressor. The
auxiliary heater for the water
pump operates.
13 / / / Low suction temperature D E4
Switch off the compressor. The
auxiliary heater for the water
pump operates.
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