SiENBE18-621
Troubleshooting for RA Indoor Unit
Troubleshooting
271
4.2
Freeze-up Protection Control or High Pressure Control
Remote Control
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 BPMKS967B2B
Page 1: ...SiENBE18 621 E Series Service Manual Applied Models Super Multi Plus Heat Pump...
Page 12: ...SiENBE18 621 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 19: ...List of Functions SiENBE18 621 8 List of Functions...
Page 33: ...Specifications SiENBE18 621 22 Specifications...
Page 69: ...Refrigerant Flow for Each Operation Mode SiENBE18 621 58 Refrigerant Circuit...
Page 121: ...Indoor Unit SkyAir Models SiENBE18 621 110 Function...
Page 169: ...Instruction SiENBE18 621 158 System Configuration FTXS 20 25 35C Indoor Unit...
Page 371: ...Method of Replacing The Inverter s Power Transistors Modules SiENBE18 621 360 Troubleshooting...
Page 393: ...SiENBE18 621 vi Index...