Hisense 88FZBpC, Maintenance Manual, Page: 36 / 37

Page 35 of 37
Fault self-test code23
Compressor overheating fault
Compressor is very hot?
否
Outdoor control
board fault and
replace it
Temperature
protection switch is
bad and replace it
Compressor shell
temperature protection
switch is open-cruit?
no
yes
Normal protection and
automatically reply
over a period of time
yes
The exhaust temperature
sensor resistance is
normal?
yes
Sensor fault and
replace it
no
Fault self-test code26
Over-current fault
The running current
exceeded the range of
rated current?
no
Outdoor filter substrate
failure and replace it
Outdoor control board
fault and replace it
After replacement of
outdoor control board, the
air conditioner is running
properly?
no
yes
Normal protection and
automatically reply over
a period of time
yes
After turning off and
restarting the air
conditioner again, it is
normal ?
yes
After turning off and
restarting the air
conditioner again, it is
normal ?
no
yes
Accidental phenomenon,
the air conditioner is normal
Fault self-test code27
No Load Failure
Compressor is running?
no
Outdoor filter substrate
failure and replace it
IPM fault and
replace it
Is the voltage between P
and N of the IPM normal?
no
yes
yes
Is there voltage output
between IPM ’ s UVW?
no
yes Compressor Fault
Outdoor filter substrate
failure and replace it
Outdoor control board
fault and replace it
After replacement of outdoor
control board, the air
conditioner is running properly?
no
yes
Fault self-test code28
Supply voltage abnormal
Is the power supply
voltage beyond the scope
of rated voltage?
no
Outdoor control
board fault and
replace it
yes
Normal protection, the air
conditioner is running
normally after the voltage
returning to normal
Fault self-test code29
Outdoor instantaneous
power failure
Is the socket, power cord,
cables, main cable installation,
connection reliable?
yes
Turn off air-conditioner
power supply, and restart
it after 3 minutes
no
Supply voltage instability
and normal protection
Outdoor control board
fault and replace it
After turning off and
restarting the air conditioner
again, it is normal ?
Can the air conditioner start
and the compressor operate?
否
yes 是否还会出现故障
Wire Failure and
reconnect the line
yes
是
no
否
and the resistance is smaller