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Si04-306
Troubleshooting
Service Diagnosis
95
4.3
Freeze-up Protection Control
or
High Pressure Control
Remote
Controller
Display
A5
Method of
Malfunction
Detection
High pressure control (heat pump model only)
During heating operations, the temperature detected by the indoor heat exchanger
thermistor is used for the high pressure control (stop, outdoor fan stop, etc.)
The freeze-up protection control (operation halt) is activated during cooling operation
according to the temperature detected by the indoor unit heat exchanger thermistor.
Malfunction
Decision
Conditions
High pressure control
During heating operations, the temperature detected by the indoor heat exchanger
thermistor is above 65°C
Freeze-up protection
When the indoor unit heat exchanger temperature is below 0°C during cooling operation.
Supposed
Causes
Operation halt due to clogged air filter of the indoor unit.
Operation halt due to dust accumulation on the indoor unit heat exchanger.
Operation halt due to short-circuit.
Detection error due to faulty indoor unit heat exchanger thermistor.
Detection error due to faulty indoor unit PCB.
Summary of Contents for FTKS50BVMA
Page 17: ...List of Functions Si04 306 8 List of Functions...
Page 35: ...Specifications Si04 306 26 Specifications...
Page 143: ...Check Si04 306 134 Service Diagnosis...
Page 187: ...Outdoor Unit Si04 306 178 Removal Procedure...
Page 191: ...Others Si04 306 182 Others...
Page 201: ...Wiring Diagrams Si04 306 192 Appendix FTKD 18 24 28 BVMS...
Page 203: ...Wiring Diagrams Si04 306 194 Appendix RKD 18 24 28 BVMS...