Gree GUHD09NK3FO Service Manual page 83

U-Match Series DC
Inverter Service Manual
Malfunction
10 F2 of condenser
temperature sensor
Malfunction of
11 F3 outdoor ambient
temperature sensor
Malfunction
12 F4 of discharge
temperature sensor
Malfunction
13 F5 wired controller
temperature sensor
Malfunction of outdoor
14 ee
drive memory chip
Compressor overload
15 H3
protection
16 H4 Overload protection
Malfunction of
17 H6
outdoor fan motor
Direction changing
18 U7 malfunction of
4-way valve
Communication
19 P6 malfunction between
main control and drive
Malfunction of
20 EE outdoor main control
memory chip
80
If the outdoor condenser temperature sensor is detected of open
circuit or short circuit for 5s successively, condenser temperature
Condenser
sensor malfunction will be reported. The unit can automatically
temperature
resume operation after the malfunction disappears. If condenser
sensor
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
Outdoor ambient
sensor malfunction will be reported. The unit can automatically
temperature
resume operation after the malfunction disappears. If outdoor
sensor
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
Discharge circuit or short circuit for 5s successively after the compressor
temperature has been operating for 3min, outdoor discharge temperature
sensor 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
Wired controller 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
Outdoor started. The unit cannot be recovered automatically. If the malfunction
drive board 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
Compressor
protection. If the fault occurs successively 3 times, the unit cannot
overload switch
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
Evaporator temp. value, the unit will report overload protection. The unit will not restart
temperature, operation until tube temperature is lower than the protective temp. value
condenser and the compressor is stopped for 3min. If the protection occurs over 6
temperature 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
Outdoor fan malfunction will be reported. In this case, the unit can automatically
motor 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.
After the compressor starts operation in heating mode, if the outdoor
unit detects the difference between evaporator temperature and
indoor ambient temperature is lower than the protective value
for 10min successively, direction changing malfunction of 4-way
4-way valve valve will be reported and the outdoor unit will stop operation.
malfunctions. If the malfunction occurs 3 times, the unit cannot
be recovered automatically. Switch off the unit or re-energize
the unit after cutting off power to eliminate this malfunction.
Communication
If the outdoor main control board does not receive data from drive
between main
board, communication malfunction between main control and drive
control board
will be reported. This malfunction can be eliminated automatically.
and drive board
If the memory chip of outdoor main control board is broken, the unit cannot
Outdoor main be started. The unit cannot be recovered automatically. If the malfunction
control board cannot be eliminated after switching off the unit and then energizing the
unit for several times, please replace the outdoor main control board.