Low Pressure Sensor; Malfunction Of #1; Memory Failure; Water Tank Temperature Too High/Low - Daikin UHA075B5 Catalogue/Engineering Data

S/N Error code
The LED indicator of the unit
37 displays ER53 and the wired
controller displays 53
The LED indicator of the unit
38 displays ER54 and the wired
controller displays 54
The LED indicator of the unit
39 displays ER55 and the wired
controller displays 55
The LED indicator of the unit
40 displays ER56 and the wired
controller displays 56
The LED indicator of the unit
41 displays ER57 and the wired
controller displays 57
The LED indicator of the unit
42 displays ER58 and the wired
controller displays 58
The LED indicator of the unit
43 displays ER60 and the wired
controller displays 60
Symptom

Low pressure sensor

malfunction of #1

Memory failure

Water tank temperature too
high/low

Water level switch

malfunction
Entering/leaving water
temperature too high
Anti-freezing protection
No system can start up
Possible cause
1. Three lines of the low
pressure sensor is incorrectly
connected
2. The low pressure sensor is
shorted/ open
3. The Low pressure sensor
has broken down
4. There is something wrong
with the test circuit of the
low pressure sensor in the
control module
Memory damage
1. Entering/leaving water
temperature too high
2. water tank temperature too
low
3. TH5 sensor malfunction
1. Wrong wired
2. Open or short circuit
1. Entering water temperature
setting too high
2. Water flow too small cause
large temperature difference
1. Water tank temperature
too low
2. TH6 sensor malfunction
All unit alarm and stop( can't
reset autometicly)
Solution
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
See item 41
Heating (heater or unit
heating)
Replace sensor
Wiring again
Replace
Set the entering water
temperature
See item 6
Heating (heater or unit
heating)
Replace sensor
Check unit error code
Trouble shooting
55