SiUS39-602 Troubleshooting by Indication on the Remote Controller
Troubleshooting 185
2.50
“
U9
”
Indoor Units:
Malfunction of Transmission between
Indoor Units and Outdoor Units in the Same System
Remote
Controller
Display
U9
Applicable
Models
All models of indoor units
Method of
Malfunction
Detection
Detect the malfunction signal of any other indoor unit within the system concerned.
Malfunction
Decision
Conditions
When the malfunction decision is made on any other indoor unit within the system concerned.
Supposed
Causes
Malfunction of transmission within or outside of other system
Malfunction of electronic expansion valve in indoor unit of other system
Defect of PC board of indoor unit in other system
Improper connection of transmission wiring between indoor and outdoor unit
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