Gree U-MATCH Series Service Manual page 85

U-Match Series DC Inverter Service Manual
Malfunction
No. Error code
Malfunction of
11 F1
temperature
Malfunction of
12 F2
temperature
Malfunction of
outdoor ambient
13 F3
temperature
Malfunction of
14 F4
temperature
Malfunction
wired controller
15 F5
temperature
Malfunction of
18 ee outdoor drive
memory chip
Compressor
20 H3
21 H4
Malfunction of
23 H6 outdoor fan
Origin of
malfunction
name
signal
Evaporator
evaporator
temperature
sensor
sensor
Condenser
condenser
temperature
sensor
sensor
Outdoor
ambient
temperature
sensor sensor
Discharge
discharge
temperature
sensor
sensor
Wired controller
sensor
Outdoor drive
board
Compressor
overload
overload switch
protection
Evaporator
Overload temperature,
protection condenser
temperature
Outdoor fan
motor
motor
Control description
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.
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.
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.
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.
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.
If the memory chip of outdoor drive board is broken, the unit
cannot be started. The
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.
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.
If outdoor unit detects that the tube temperature is higher
than protective temp. Value, the unit will report overload
protection. The unit will not restart operation until tube
temperature is lower than the protective temp. Value and the
compressor is stopped for 3min. If the protection occurs over
6 times, the unit cannot be recovered automatically. Switch
off the unit or re-energize the unit after cutting off power to
eliminate this protection.
If the outdoor unit does not receive signal from outdoor fan
motor for 30s successively when the fan motor is operating,
outdoor fan motor malfunction will be reported. In this case,
the unit can automatically resume operation after stopping. If
the malfunction occurs 6 times within one hour, the unit
cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this
malfunction.
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unit cannot be recovered