Fisher FSAI-CP-90BE3 Service Manual page 52

Service Manual
Dual-8
Malfunction
No.
Code
Name
Display
Internal motor
34 (fan motor) do
not operate
Desynchro-
35 nizing of
compressor
PFC
36
protection
Outdoor DC
37 fan motor
malfunction
power
38
protection
Indoor unit
and outdoor
39
unit doesnt
match
Failure start-
40
up
Normal
41 communica-
tion
42 Defrosting
Malfunction of
phase current
43 detection
circuit for
compressor
Malfunction of
voltage
44
dropping for
DC bus-bar
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
operation Cool Heating
Indicator Indicator Indicator
H6
H7
HC
L3
L9
LP
LC
OFF 3S
and blink
once
(during
blinking,
oN 10s
and OFF
0.5s)
U1
U3
A/C status
Internal fan motor, external fan motor,
compressor and electric heater stop
operation,guide louver stops at present
location.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop operation.
Outdoor DC fan motor malfunction lead to
compressor stop operation,
compressor stop operation and Outdoor fan
motor will stop 30s latter , 3 minutes latter
fan motor and compressor will restart
compressor and Outdoor fan motor cant
work
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop operation.
Defrosting will occur in heating
mode. Compressor will operate
while indoor fan will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Possible Causes
1. Bad contact of DC motor
feedback terminal.
2. Bad contact of DC motor
control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard rev
detecting circuit.
Refer to the malfunction analysis (IPM
protection, loss of synchronism protection
and overcurrent protection of phase current
for compressor.
Refer to the malfunction analysis
DC fan motor malfunction or system blocked
or the connector loosed
To protect the electronical components when
detect high power
Indoor unit and outdoor unit doesnt match
Refer to the malfunction analysis
Its the normal state
Replace outdoor control panel AP1
Supply voltage is unstable
49