ACDC SDAW4.6-220, Инструкция по установке и обслуживанию

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24
TROUBLESHOOTING
This section provides useful information for diagnosing and correcting certain troubles which may occur
in the unit.
General guidelines
Before starting the troubleshooting procedure, carry out a through visual inspection of the unit and look
for obvious defects such as loose connections or defective wiring.
Before contacting your local dealer, read this chapter carefully, it will save you time and money.
WHEN CARRYING OUT AN INSPECTION ON THE SWITCH BOX OF THE UNIT, ALWAYS MAKE SURE
THAT THE MAIN SWITCH OF THE UNIT IS SWITCHED ‘OFF’.
When a safety device was activated, stop the unit and find out why the safety device was activated
before resetting it. Under no circumstances safety devices may be bridged or changed to a value other
than the factory setting. If the cause of the problem cannot be found, call your local dealer/installer.
If the pressure relief valve is not working correctly and needs to be replaced.
Malfunctioning of the unit and error codes
When an error occurs or the protection mode is set automatically, the circuit board and the wired
controller will both display the error message.
Protection/Malfunct
ion Error code Possible reasons Correction Mode
Inlet water temp.
sensor failure
PP 01 1
）
Sensor open circuit
2
）
Sensor short circuit
3
）
Main PCB damaged
1
）
Check this sensor
connection
2
）
Replace this sensor
3
）
Replace the main PCB
Outlet water temp.
sensor failure
PP 02 1) Sensor open circuit
2)Sensor short circuit
3)Main PCB damaged 1)Check this sensor connection
2)Replace this sensor
3)Replace the main PCB
Evaporator coil
temp. sensor failure
PP 03 1)Sensor open circuit
2)Sensor short circuit
3)Main PCB damaged 1)Check this sensor connection
2)Replace this sensor
3)Replace the main PCB
Ambient temp.
sensor failure
PP 05 1)Sensor open circuit
2)Sensor short circuit
3)Main PCB damaged 1)Check this sensor connection
2)Replace this sensor
3)Replace the main PCB
Too low outlet water
temp. protection
PP 07
1
）
Too low water temp.
2) Too low water flow
3) Unreasonable anti freeze
protection temp setting
4)Main PCB damaged
2)Adjust water pump to right
gear
3)Adjust to right anti freeze
protection temp
4)Replace main PCB