SiEN12-710A
Troubleshooting
Service Diagnosis
117
4.7 Freeze-up Protection Control
Remote Control
Display
A5
Method of
Malfunction
Detection
Indoor unit icing, during cooling operation, is detected by checking the temperatures sensed by
the indoor unit heat exchanger thermistor and room temperature thermistor that are located in a
shut-down room.
At another room (the indoor unit is normal), “
UH
” is displayed on the remote control.
Malfunction
Decision
Conditions
In the cooling mode, the following conditions (A) and (B) are kept together for 5 minutes.
(A) Indoor unit heat exchanger temperature
≤
–1°C
(B) Indoor unit heat exchanger temperature
≤
Room temperature –10°C
If the freeze-up protection control is activated 4 times continuously, the system will be shut
down.
(The 4-time counter will reset itself if any of the following errors does not occur for 60 minutes.
: OL, radiation fin temperature rise, insufficient gas, and compressor lock.)
Supposed
Causes
"
Wrong wiring or piping
"
EV malfunctioning in each room
"
Short-circuit
"
Indoor unit heat exchanger thermistor abnormality
"
Room temperature thermistor abnormality
Содержание 2MKS40FV1B
Страница 11: ...Introduction SiEN12 710A x ...
Страница 12: ...SiEN12 710A List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Страница 17: ...Heat Pump SiEN12 710A 6 List of Functions ...
Страница 25: ...Heat Pump SiEN12 710A 14 Specifications ...
Страница 33: ...Printed Circuit Board Connector Wiring Diagram SiEN12 710A 22 Printed Circuit Board Connector Wiring Diagram ...
Страница 75: ...Instruction SiEN12 710A 64 Operation Manual 2 3 Names of Parts FTKS 25 35 D FTXS 25 35 E Indoor unit ...
Страница 111: ...Instruction SiEN12 710A 100 Operation Manual ...
Страница 199: ...Wiring Diagrams SiEN12 710A 188 Appendix ...
Страница 203: ...SiEN12 710A iv Index ...