Daikin UWL030B5 - Trouble shooting Refrigerant Leakage and Pressure

45
S/N Error Code Symptom Possible Cause Solution
37
The LED indicator
of the unit displays
ER55 and the
wired controller
displays 55
Over-low
of water
temperature of
condenser
The temperature of return water is set too low. Change the temperature setting for return water.
TH8 temperature sensor is shorted/ open.
Test whether the resistance of TH8 sensor meets
specication requirements/replace if not.
38
The LED indicator
of the unit displays
ER56 and the
wired controller
displays 56
Overload of
compressor in
#1
Over current in the compressor has triggered
the overload protector.
1. Check whether the electric current parameter
of the overload protector is congured correctly by
referring to the electric circuit.
2. Check whether the resistor of the malfunctioned
compressor meets specication requirements.
39
The LED indicator
of the unit displays
ER57 and the
wired controller
displays 57
Overload of
compressor in
#3
Over current in the compressor has triggered
the overload protector.
1. Check whether the electric current parameter
of the overload protector is congured correctly by
referring to the electric circuit.
2. Check whether the resistor of the malfunctioned
compressor meets specication requirements.
40
The LED indicator
of the unit displays
ER58 and the
wired controller
displays 58
Overload of
compressor in
#4
Over current in the compressor has triggered
the overload protector.
1. Check whether the electric current parameter
of the overload protector is congured correctly by
referring to the electric circuit.
2. Check whether the resistor of the malfunctioned
compressor meets specication requirements.
41
The LED indicator
of the unit displays
ER59 and the
wired controller
displays 59
High pressure of
#4
1. Heat exchanger dirty. Check and troubleshoot.
2. Blocked of refrigerant lter. Check and replace.
3. Water temperature too high (condenser). Tune down the water temperature.
4. Lack of water (condenser). Check and troubleshoot
5. Blocked of water lter (condenser). Clean the water lter.
6. Too much refrigerant. Release a proper amount of refrigerant.
7. Failure of high-voltage modular output port. Replace the module.
8. The switch has broken down. Replace the pressure switch.
42
The LED indicator
of the unit displays
ER60 and the
wired controller
displays 60
Low pressure of
#3
Malfunction of heat exchanger. Check and troubleshoot.
Insufcient refrigerant or leakage . Check and replenish refrigerant.
Failure of low-voltage modular input port . Replace the module.
The low pressure sensor has broken down. Replace the pressure sensor.
43
The LED indicator
of the unit displays
ER61 and the
wired controller
displays 61
Low pressure of
#4
Malfunction of heat exchanger. Check and troubleshoot.
Insufcient refrigerant or leakage. Check and replenish refrigerant.
Failure of low-voltage modular input port. Replace the module.
The low pressure sensor has broken down. Replace the pressure sensor.
44
The LED indicator
of the unit displays
ER62 and the
wired controller
displays 62
Superheat of #3
is too low
The low pressure sensor or temperature
sensor has broken down.
Replace
EXV broken down. Replace EXV.
45
The LED indicator
of the unit displays
ER63 and the
wired controller
displays 63
Superheat of #4
is too low
The low pressure sensor or temperature
sensor has broken down.
Replace
EXV broken down. Replace EXV.
46
The LED indicator
of the unit displays
ER65 and the
wired controller
displays 65
Suction
temperature
sensor
malfunction of
#3
TH11 temperature sensor is not properly
plugged or has broken off.
Check the control module and replug the
temperature sensor.
TH11 temperature sensor is shorted/ open.
Test whether the resistance of TH11 sensor meets
specication requirements/replace if not.
There is something wrong with the test circuit
of the temperature sensor in the control
module.
Replace the control module.
47
The LED indicator
of the unit displays
ER66 and the
wired controller
displays 66
Suction
temperature
sensor
malfunction of
#4
TH12 temperature sensor is not properly
plugged or has broken off.
Check the control module and replug the
temperature sensor.
TH12 temperature sensor is shorted/ open.
Test whether the resistance of TH12 sensor
meets specication requirements/replace if not.
There is something wrong with the test circuit
of the temperature sensor in the control
module.
Replace the control module.