Daikin UWL-B5 Series Catalogue/Engineering Data page 45

S/N Error Code
The LED indicator
of the unit displays
28 ER46 and the
wired controller
displays 46
The LED indicator
of the unit displays
29 ER47and the
wired controller
displays 47
The LED indicator
of the unit displays
30 ER48 and the
wired controller
displays 48
The LED indicator
of the unit displays
31 ER49 and the
wired controller
displays 49
The LED indicator
of the unit displays
32 ER50 and the
wired controller
displays 50
The LED indicator
of the unit displays
33 ER51 and the
wired controller
displays 51
The LED indicator
of the unit displays
34 ER52 and the
wired controller
displays 52
The LED indicator
of the unit displays
35 ER53 and the wired
controller displays
53
The LED indicator
of the unit displays
36 ER54 and the
wired controller
displays 54
44
Symptom
TH7 temperature sensor is not properly
plugged or has broken off.
Leaving water
temperature
TH7 temperature sensor is shorted/ open.
sensor
malfunction of
There is something wrong with the test circuit
evaporator
of the temperature sensor in the control
module.
TH8 temperature sensor is not properly
plugged or has broken off.
Entering water
temperature
TH8 temperature sensor is shorted/ open.
sensor
malfunction of
There is something wrong with the test circuit
condenser
of the temperature sensor in the control
module.
TH9 temperature sensor is not properly
plugged or has broken off.
Suction
temperature
TH9 temperature sensor is shorted/ open.
sensor
malfunction of
There is something wrong with the test circuit
#1
of the temperature sensor in the control
module.
TH10 temperature sensor is not properly
plugged or has broken off.
Suction
temperature
TH10 temperature sensor is shorted/ open.
sensor
malfunction of
There is something wrong with the test circuit
#2
of the temperature sensor in the control
module.
TH11 temperature sensor is not properly
plugged or has broken off.
Suction
temperature
TH11 temperature sensor is shorted/ open.
sensor
malfunction of
There is something wrong with the test circuit
#3
of the temperature sensor in the control
module.
TH12 temperature sensor is not properly
plugged or has broken off.
Suction
temperature
TH12 temperature sensor is shorted/ open.
sensor
malfunction of
There is something wrong with the test circuit
#4
of the temperature sensor in the control
module.
Three lines of the low pressure sensor is
incorrectly connected.
Low pressure
The low pressure sensor is shorted/ open.
sensor
malfunction of
The Low pressure sensor has broken down
#2
There is something wrong with the test circuit
of the low pressure sensor in the control
module.
Three lines of the low pressure sensor is
incorrectly connected.
Low pressure
The low pressure sensor is shorted/ open.
sensor
malfunction of
The Low pressure sensor has broken down
#1
There is something wrong with the test circuit
of the low pressure sensor in the control
module.
Memory failure Memory damage
Possible Cause Solution
Check the control module and replug the
temperature sensor.
Test whether the resistance of TH7 sensor meets
specification requirements/replace if not.
Replace the control module.
Check the control module and replug the
temperature sensor.
Test whether the resistance of TH8 sensor meets
specification requirements/replace if not.
Replace the control module.
Check the control module and replug the
temperature sensor.
Test whether the resistance of TH9 sensor meets
specification requirements/replace if not.
Replace the control module.
Check the control module and replug the
temperature sensor.
Test whether the resistance of TH10 sensor
meets specification requirements/replace if not.
Replace the control module.
Check the control module and replug the
temperature sensor.
Test whether the resistance of TH11 sensor meets
specification requirements/replace if not.
Replace the control module.
Check the control module and replug the
temperature sensor.
Test whether the resistance of TH12 sensor
meets specification requirements/replace if not.
Replace the control module.
Reconnect the connecting lines of the low
pressure sensor.
Repair or replace the lines of the low pressure
sensor.
Replace the low pressure sensor.
Replace the control module.
Reconnect the connecting lines of the low
pressure sensor.
Repair or replace the lines of the low pressure
sensor.
Replace the low pressure sensor.
Replace the control module.
Replace the control module