GRE HPGI50 - Page 73

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7. Troubleshooting
7.1 Error code display on LED wire controller
Malfunction
Error
code
Reason
Solution
Inlet water temperature
sensor failure d1-TH6
PP01
1. The sensor in open or short circuit
2. The wiring of sensor is loose
1. Check or change the sensor
2.Re-fix the wiring of the sensors
Outlet water temperature
sensor failure d2-TH5
PP02
1. The sensor in open or short circuit
2. The wiring of sensor is loose
1. Check or change the sensor
2.Re-fix the wiring of the sensors
Heating piping sensor failure
d5-TH2
PP03
1. The sensor in open or short circuit
2. The wiring of sensor is loose
1. Check or change the sensor
2.Re-fix the wiring of the sensors
Ambient temperature sensor
failure d3-TH1
PP05
1. The sensor in open or short circuit
2. The wiring of sensor is loose
1. Check or change the sensor
2.Re-fix the wiring of the sensors
Exhaust piping sensor failure
d6-TH3
PP06
1. The sensor in open or short circuit
2. The wiring of sensor is loose
1. Check or change the sensor
2.Re-fix the wiring of the sensors
Antifreeze protection in
Winter
PP07
Ambient temperature or water inlet
temperature is too low
1. Check the d1((inlet water temp.) and
d3(outlet water temp.)
2. Normal protection
Low ambient temperature
protection
PP08
1. Out of the normal operating
ambient temperature for this
machine by checking d3
2. Sensor abnormality d3-TH1
1. Stop using, beyond the scope of using
2.Change the sensor
High pressure failure TS4
EE01
1. Ambient temperature is too high
2. Water temperature is too high
3. Water flow is too low
4. Fan motor speed is abnormal
5. Gas system jammed
6. High pressure wire is loose or
damaged
7. Too much refrigerant
1. Choose the silent mode.
2. Check the water flow or filtration pump
3. Check and repair the refrigerating
system
4. Reconnect the high pressure wire or
replace a new high pressure switch
5. Check and repair the refrigerating
system