Gree U-match Series

U-Match Series DC Inverter Service Manual
83
No.
Error code
Malfunction
name
Origin of
malfunction
signal
Control description
32
U7
Direction
changing
malfunction of
4-way valve
4-way valve
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 valve will be reported and the
outdoor unit will stop operation. The unit can automatically
resume operation in the first two 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.
35
P6
Communication
malfunction
between main
control and
drive
Communication
between main
control board
and drive board
If the outdoor main control board does not receive data from
drive board, communication malfunction between main
control and drive will be reported. This malfunction can be
eliminated automatically.
47
EE
Malfunction of
outdoor main
control memory
chip
Outdoor main
control board
If the memory chip of outdoor main control 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 main control board.
48
oE
/
/
Malfunctions of outdoor unit, please refer to status of error
indicator in outdoor unit
1.2 Description of Drive Malfunction
Main board dual 8 numeral tube Display Codes for Outdoor Unit of 24~60k
Malfunction Item
Indoor Unit Display
Outdoor unit display of dual 8
numeral tube
DC busbar over-voltage protection
PH
PH
IPM or PFC over-temperature protection
P8
P8
Current sense circuit error
Pc
Pc
IPM or PFC temperature sensor error
P7
P7
Compressor current protection
P5
P5
DC busbar under-voltage protection
PL
PL
Compressor startup failure
Lc
Lc
Drive module reset
P0
P0
Compressor motor desynchronizing
H7
H7
Phase loss
Ld
Ld
Drive-to-main-control communication error
P6
P6
IPM protection
H5
H5
Compressor overload protection
H3
H3
AC current protection (input side)
PA
PA
Charging circuit error
PU
PU
PFC protection
HC
HC
DC fan error
H6
H6
Input AC voltage abnormality
PP
PP
Driving board memory chip error
ee
ee