A3" Indoor Unit: Malfunction Of Drain Level Control System (33H) - Panasonic Mini UM S Service Manual

Troubleshooting by Indication on the Remote Controller
4.3 "A3" Indoor Unit: Malfunction of Drain Level Control
System (33H)
A3
Remote
Controller
Display
Applicable
All indoor unit models
Models
Method of
By float switch OFF detection
Malfunction
Detection
Malfunction
When rise of water level is not a condition and the float switch goes OFF.
Decision
Conditions
Supposed
Causes
106
220~240V power supply is not provided
Defect of float switch or short circuit connector
Defect of drain pump
Drain clogging, upward slope, etc.
Defect of indoor unit PC board
Loose connection of connector
Mini UM S/M
Troubleshooting