Malfunction Of Transmission Between Indoor Units; U4" Malfunction Of Transmission Between Indoor Units - Daikin RXYQ5-48MAY1 Service Manual

Si39-407
3.43 " U4 "

Malfunction of Transmission Between Indoor Units

U4
Remote
Controller
Display
Applicable All model of indoor unit
Models RXYQ5MA~48MA
Method of Microcomputer checks if transmission between indoor and outdoor units is normal.
Malfunction
Detection
Malfunction When transmission is not carried out normally for a certain amount of time
Decision
Conditions
Supposed
Causes
Troubleshooting
Indoor to outdoor, outdoor to outdoor transmission wiring F1, F2 disconnection, short circuit
or wrong wiring
Outdoor unit power supply is OFF
System address doesn't match
Defect of indoor unit PC board
Defect of outdoor unit PC board
Troubleshooting by Indication on the Remote Controller
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