Service Manual

U-Match Series DC Inverter Service Manual
96
No.
Error code
Malfunction
name
Origin of
malfunction
signal
Control description
7
E9
Full water
protection
Water level
switch
If cut-off of water level switch is detected for 8s successively
once energized, the system will enter full water protection. In this
case, switch off the unit and then switch it on to eliminate this
malfunction.
8
F0
Malfunction of
indoor ambient
temperature
sensor at air
return port
Indoor ambient
temperature
sensor
If the indoor ambient temperature sensor is detected of open
circuit or short circuit for 5s successively, indoor ambient
temperature sensor malfunction will be reported. The unit can
automatically resume operation after the malfunction disappears.
If indoor ambient temperature sensor malfunction occurs in fan
mode, only the error code is displayed and the indoor unit can
work normally.
9
F1
Malfunction of
evaporator
temperature
sensor
Evaporator
temperature
sensor
If the indoor evaporator temperature sensor is detected of open
circuit or short circuit for 5s successively, evaporator
temperature sensor malfunction will be reported. The unit can
automatically resume operation after the malfunction disappears.
If evaporator temperature sensor malfunction occurs in fan
mode, only the error code is displayed and the indoor unit can
work normally.
10
F2
Malfunction of
condenser
temperature
sensor
Condenser
temperature
sensor
If the outdoor condenser temperature sensor is detected of open
circuit or short circuit for 5s successively, condenser temperature
sensor malfunction will be reported. The unit can automatically
resume operation after the malfunction disappears. If condenser
temperature sensor malfunction occurs in fan mode, only the
error code is displayed and the indoor unit can work normally.
11
F3
Malfunction of
outdoor ambient
temperature
sensor
Outdoor ambient
temperature
sensor
If the outdoor ambient temperature sensor is detected of open
circuit or short circuit for 5s successively, outdoor ambient
temperature sensor malfunction will be reported. The unit can
automatically resume operation after the malfunction disappears.
If outdoor ambient temperature sensor malfunction occurs in fan
mode, only the error code is displayed and the indoor unit can
work normally.
12
F4
Malfunction of
discharge
temperature
sensor
Discharge
temperature
sensor
If the outdoor discharge temperature sensor is detected of open
circuit or short circuit for 5s successively after the compressor
has been operating for 3min, outdoor discharge temperature
sensor malfunction will be reported. The unit can automatically
resume operation after the malfunction disappears.
13
F5
Malfunction wired
controller
temperature
sensor
Wired controller
If the wired controller detects open circuit or short circuit of its
temperature sensor for 5s successively, wired controller
temperature sensor malfunction will be reported.
14
ee
Malfunction of
outdoor drive
memory chip
Outdoor drive
board
If the memory chip of outdoor drive board is broken, the unit
cannot be started. The unit cannot be recovered automatically. If
the malfunction cannot be eliminated after switching off the unit
and then energizing the unit for several times, please replace the
outdoor drive board.
15
H3
Compressor
overload
protection
Compressor
overload switch
If it is detected within 3s successively that the overload switch is
cut off under ON or standby state, the unit will report overload
protection. If the fault occurs successively 3 times, the unit
cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this
protection.