U4 Malfunction Of Transmission Between Indoor Units - Daikin RXYQ96PYDN Service Manual

SiUS34-801A_b
U4
3.48 Malfunction of Transmission between Indoor Units
U4
Remote
Controller
Display
Applicable All models of indoor unit
Models RXYQ72P~240PYDN, PTJU
REYQ72P~240PYDN, PTJU
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
Defect of high pressure sensor system
Defect of low pressure sensor system
Incorrect connection of pressure sensor(s)
Troubleshooting by Indication on the Remote Controller
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