LG LZ-H015GBA2, Руководство по обслуживанию

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Only for training and service purposes
LGE Internal Use Only
Troubleshooting
Troubleshooting
Instructions for diagnostics
- When separating main PCB, hold the tip of main PCB to prevent any force into over-all parts.
- When separating main PCB, be careful of the edge of metal plate.
- When pulling or putting a connector on main PCB, do not pull the lead wire, instead pull the entire housing.
For the ventilation system failure
No. Failure Possible Causes Necessary actions
• Check the power line
• Check the wiring of PCB remote
controller switch
• Check if FUSE is disconnected
• * Isn't it normal ventilation mode?
• * Is damper working normally?
• Check the PCB remote controller
switch wiring
• Check the PCB remote controller
switch wiring
• Check the fan motor
• *Defrosting operation
• Check the Thermistor
• Check if it is AC220V for power of
PCB fan motor terminal
• Check the connection of connector to
PCB
• Isn't it in defrosting operation?
• Re-construct the power
• Wire in accordance with power wiring diagram
• Replace FUSE
• Convert the function into
Total heat exchange mode
• Check whether damper is operating while
repeating total heat exchange and normal
ventilating alternately
• Wire in accordance with power wiring diagram
• Wire in accordance with power wiring diagram
• Re-wire for motor Connector separation, and
replacing for inferior motor
• Check the Thermistor, Check Outdoor
Temperature
• Replace the Thermistor
• If it is AC220V, the air flow control relay is in bad
condition (replace PCB)
• Re-wire for damper connector separation, and
replacing for inferior connector
Check the Outdoor temperature
Failure in Operation 1
Failure in Total Heat
Exchange
2
Failure in Operating
Remote controller switch 3
Failure in
Supply/Exhaust Fan
Operation 4
Failure in Defrosting Operation
Failure in Air flow
Control
* Failure in Damper
Operation
5
6
7
❈
The part marked with * is not applied to LZ-H015GBA2 / LZ-H025GBA2 / LZ-H035GBA2