Lennox LI012CI-170P432-1 Service Manual page 56

Service Manual
Malfunction
NO.
Name
System is
34
abnormal
IPM
35
protection
Anti-freezing
protection for
36
evaporator
Internal motor
37 (fan motor) do
not operate
Desynchro-
38 nizing of
compressor
PFC
39
protection
Outdoor DC
40 fan motor
malfunction
power
41
protection
Indoor unit
and outdoor
42
unit doesn't
match
Failure start-
43
up
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
Dual-8
0.5s)
Code
Display
Operation Cool Heating
Indicator Indicator Indicator
H4
H5
E2
H6
H7
HC
L3
L9
LP
LC
A/C status
During cooling and drying
operation, compressor will stop
Refer to the malfunction analysis
while indoor fan will operate;
(overload, high temperature
During heating operation, the
resistant)
complete unit will stop
operation.
During cooling and drying
Refer to the malfunction
operation, compressor will stop
analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
Not the error code. It's the
status code for the operation.
1. Bad contact of DC motor
feedback terminal.
Internal fan motor, external fan
2. Bad contact of DC motor
motor, compressor and electric
control end.
heater stop operation,guide
3. Fan motor is stalling.
louver stops at present
4. Motor malfunction.
location.
5. Malfunction of mainboard rev
detecting circuit.
During cooling and drying
Refer to the malfunction
operation, compressor will stop
analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Replace outdoor control panel
During heating operation, the
AP1 or Reactor
complete unit will stop
operation.
DC fan motor malfunction or
Outdoor DC fan motor
malfunction lead to compressor system blocked or the connector
stop operation,
loosed
compressor stop operation and
Outdoor fan motor will stop To protect the electronical
30s latter , 3 minutes latter components when detect high
fan motor and compressor will power
restart
compressor and Outdoor fan Indoor unit and outdoor unit doesn't
motor can't work match
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Refer to the malfunction analysis
During heating operation, the
complete unit will stop
operation.
Possible Causes
53