Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
105
2.4.2 Outdoor Unit
Error code
Troubleshooting
Description of error
Description of diagnosis
E7 - 01
Fan motor lock
The fan motor has caused abnormal rotation. Check for the
connection of the connector between the fan motor and the
outdoor unit PCB. If the connection is normal, replace the fan
motor. If this still cannot solve the error, replace the outdoor
unit PCB.
L1 - 01
Instantaneous overcurrent error (while in startup
operation)
Refer to the “L1” flow chart of each manual and make a
diagnosis of the relevant unit based on the Error code shown
to the left.
L1 - 02
Current sensor error in PCB
L1 - 03
Current offset error
L1 - 04
IGBT error
L1 - 05
Jumper setting error
L1 - 06
SP/MP-PAM overvoltage error
L8 - 01
Electronic thermal 1 error
Overload current continues for a period of 260 seconds or
more.
This error is supposed to have resulted from excessive
charging of refrigerant, damage caused to the compressor
bearing, too high-pressure, etc.. Check and probe the cause.
L8 - 02
Electronic thermal 2 error
Overload current close to the locked current flowed in the
thermal for a period of five seconds. This error is supposed
to have resulted from closed stop valve, disconnected wire in
the compressor motor, etc. Check and probe the cause.
L8 - 03
Drop in compressor revolutions
Compressor load has been increased after startup. This
error is supposed to have resulted from instantaneous power
failure, liquid back, etc. Check and probe the cause.
L8 - 04
Thunder detection error
Surges caused by thunder
L8 - 05
Inverter limiting current
Excessive limiting current is flowing in the inverter. This error
is supposed to have resulted from failure to open the stop
valve, excessive charging of refrigerant, clogging in the
indoor unit filter stain in the indoor/outdoor unit heat
exchanger etc.. Check and probe the cause.
L9 - 01
Stall prevention (current increase)
Overload current has been applied to start up the
compressor.
This error is supposed to have resulted from high startup
differential pressure, liquid back, excessive compressor oil,
abnormal compressor coil, seizure of the compressor shaft,
etc.
Check and probe the cause.
L9 - 02
Stall prevention (startup error)
The compressor has not completed startup operation. This
error is supposed to have resulted from high startup
differential pressure, liquid back, excessive compressor oil,
abnormal compressor coil, seizure of the compressor shaft,
faulty position detection circuit, etc.. Check and probe the
cause.
LC - 01
Faulty wiring
Faulty transmission including that caused when the power
supply turns ON. This error is supposed to have resulted
from
N
Defective wire connections around the PCB,
O
faulty
outdoor unit PCB, or
P
faulty fan motor. Check and probe
the cause.
LC - 02
Faulty transmission between compressor and
micro controller
There is an error in transmission between the compressor
and the outdoor unit PCB. If the wire connections of the
compressor are normal, check for the same of the outdoor
unit PCB.
PJ - 01
Capacity setting not made
This is an outdoor unit PCB for repair, but has no capacity
setting adaptor connected. Connect a correct capacity
setting adaptor to the PCB.
PJ - 04
Faulty capacity setting
This error results from a mismatch of signals between the
controller in the PCB and the inverter. Check whether the
type of the PCB is correct and correct capacity setting
adaptor is connected.
