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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
134
3.38 “
U4
” Malfunction of Transmission between Indoor Units
and Outdoor Units
Remote
Controller
Display
U4
Applicable
Models
AII indoor unit models
RZQ18~30PVJU
Method of
Malfunction
Detection
Microcomputer checks if transmission between indoor and outdoor units is normal.
Malfunction
Decision
Conditions
When transmission is not carried out normally for a certain amount of time.
Supposed
Causes
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 outdoor unit P.C.B.
Defect of indoor unit P.C.B.
Содержание SkyAir FCQ18PVJU
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