FUJIDENZO IWAR-2910, Service Manual

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Indoor Unit
Indica on
PCB Indicator Message Solu on
Show
【
E1
】 Flash Once
Wrong Signal
Check if the co cord
between main control board and
driving board
Show
【
E2
】 Flash Twice
Error happens on the voltage
Check the voltage and the DC high
tension cord DBL, DBN, DCN1, DCP1
and DCP2 on driving board.
Show
【
E3
】 Flash Three Times
Discharge tube of compressor
is over heat
Check outdoor unit and see if there
are following errors happen.
- poor heat dissipa on
- refrigerant pressure
- cooling fan breakdown
- poor ven l on
Show
【
E4
】 Flash Four Times
IPM is out of order
Check the ground wire if it displays
E4 when compressor operate a
while.
Check driving board and see if the
IPM has been locked.
Check driving board and wiring U, V
and W if it displays E4 when
compressor starts.
Show
【
E7
】 Flash Seven Times
Error happens on discharge
tube Check the sensor co CN35
or replace sensor.
Show
【
E8
】 Flash Eight Times
Error happens on Heat Sink
Sensor of IPM Check refrigerant pressure and
pipeline leakages.
Show
【
E9
】 Flash Nine Times
Error happens on the
opera
of the compressor
Check the ground wire if it displays
E9 When compressor operate a
while.
Check the wiring U, V and W on
driving board if it displays E9 while
compressor starts.
Show
【
EA
】
Indoor temperature sensor is
out of order. Check the sensor co CN31
or replace sensor.
Show
【
Eb
】
Check the sensor co CN32
or replace sensor.
Show
【
EC
】
Outdoor temperature sensor
is out of order Check the sensor co CN33
or replace sensor.
The sensor of evaporator is
out of order.
Show
【
EE
】
Discharge tube is out of order
Check the sensor connection CN35
or replace sensor.