50 Room Air Conditioner
Troubleshooting Guide
The product does not operate with the remote controller.
Turn on Main Power
While the compressor has been stopped, the compressor does not
operate owing to the delaying function for 3 minutes after stopped.
Caused by other parts except the remote control
Cause by the remote control
When the mark( ) is displayed in LCD screen, replace
battery.
Check the contact of CN-D1, 2 connector.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the
low speed by force.)
Check Display PWB Assembly
- Voltage between CN-D2 - : DC +5V
Check the connecting circuit between the remote controller
MICOM (No. 30) - R17(2Ω) - IR LED - TR - R16(2.2KΩ).
Check point
• Check the connecting circuit between PIN -
R02L(1K) - C01L(680PF) - MICOM PIN 43
• Check Receiver Assembly