Troubleshooting - LG PAHCMS000 Service Manual

Troubleshooting

Troubleshooting
1.1 Error Indicator (Comm.Kit)
Problem
AHU Communication Kit
does not work
Error Indicator
- This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
- Error mark is displayed on wired remote controller, and 7-segment LED of outdoor unit control board as shown in
the table.
- If more than two troubles occur simultaneously, lower number of error code is first displayed.
- After error occurrence, if error is released, error LED is also released simultaneously.
[Error Code (Comm.Kit)]
Display Number
CH 01
CH 02
CH 03
CH 05
CH 06
Cause
No power supply
Wiring is wrong
AHU Communication
Kit is broken
Error Item
Room Temperature
Pipe In Temperature sensor error
Communication error between wired
remote controller and Comm. Kit
Communication error between Comm.
Kit and Outdoor Unit
Pipe Out Temperature sensor error
Check the electrical connection and voltage of the
power supply.
Check the electrical connection of the
Communication Kit (Refer to the circuit diagram of
the Communication Kit)
Check the electrical and mechanical part.
Temperature sensor disconnection or short
circuit on Room or RA of AHU
Temperature sensor disconnection or short
circuit on pipe inlet of AHU
No communication signal for more than 3
minutes from wired remote controller to the
Comm. Kit
No communication signal for 5 minutes
continuously from Comm. Kit to Outdoor Unit
Temperature sensor disconnection or short
circuit on pipe outlet of AHU
- 14 -
Remedy
Cause of Error