LG MULTI V 5 Manual Book page 45

Self-diagnosis Function
Error
Error Type Error Point
Error No. Error Type Error Point
No.
Error occurrence in
12 Inverter PCB error* Error occurrence in inverter
12 Inverter PCB error* inverter PCB
PCB
• If inverter PCB error occurs, remote controller No. 12 error is displayed, and detail error display can be checked
using LED of the inverter PCB.
• Error display
- Red LED means error no. 10's digit, and green LED means 1's digit, and when red and green simultaneously
blink, it means 100's unit.
Ex) After red and green LED simultaneously blink, red LED blinks 1 time, and green LED blinks 5 times : error
no. 115
* Refer to page 28
n Error diagnosis and countermeasure flow chart
Check remote controller CH12
Check inverter PCB LED display
Take action according
to inverter PCB error code
Red LED : 10's digit
Green LED : 1's digit
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
088
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main Reasons
1. Connector connection defect
1. Connector connection defect
2. Inverter compressor error
2. Inverter compressor error
3. Pressure sensor error
3. Pressure sensor error
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LGE Internal Use Only
Error No. Error Type Error Point
Error
Error Type Error Point
No.
Abnormal working of flow
14 Flow Switch error
Abnormal working of flow
14 Flow Switch error
switch
(*) Flow switch status test
Flow switch open.
Multi meter will display
0.FMΩ(∞Ω)
n Error diagnosis and countermeasure flow chart
Start
(*)
NO NO
Water pump
System stopped
while operation running
YES YES
Water is not enough
NO
Pressure gage or there can be
indicates 1.5~2.0 bar
water leakage inside
water circuit.
YES
B
(*)
NO NO
Water pump Control Panel
still running Shows 'CH14'
YES YES
The flow switch is The water pump
electrically open. is in trouble.
(*): How to identify? - Touch the water pump and feel if the water pump
is vibrating. If no vibration, the water pump is not operating. Also, you
C D
can see 'Water Pump Operating Icon(
• Although there is not water flow inside water circuit, the flow switch detects as if water is flowing. It is
A due to electrically closed (or short) of flow switch or the contact of flow switch is mechanically stuck.
• Replace the flow switch.
• Check if water inside water circuit is fully charged. Pressure gage at the indoor unit should indicate 1.5~2.0 bar.
• Also, as the hand of the pressure gage is not react so fast according to water charging, check the pressure gage again.
B
• Otherwise, there can be water leakage inside water circuit. Examine if water circuit is completely sealed.
• Although water is well flowing, the flow switch can not detect water flow. It is due to electrically) open of flow
C switch or the contact of flow switch is mechanically broken.
• Replace the flow switch.
• Replace the water pump.
D
• Also, check the water quality if there are particles that can yield locking at the shaft of the water pump.
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Self-diagnosis Function
Main Reasons
Main Reasons
1. Pump fault
2. Low water flow 1.Pump fault
switch
3. Flow switch fault(*) 2.Low water flow
3.Flow switch fault(*)
Flow switch off.
→ Multi meter will display
0.4Ω
NO
Control Panel
Shows 'CH14'
YES
The flow switch is
electrically closed.
A
END
(it is normal
condition)
) ' at control panel.
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LGE Internal Use Only
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