Panasonic CS-F24DTE5, Service Manual, Page: 44 / 145

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9.7.7. Sensor Disconnection Detection Control
• The sensor disconnection detection control activates when the following condition comply:
• During sensor disconnection, sensor error is displayed; all operations stops except outdoor fan remaining heat removal control.
9.7.8. Valve Error Detection Control
• This control is to protect the compressor.
• Valve error is detected if comply with condition below:
- Power is on for the first time and within 5 minutes from compressor starts (However, the unit is considered power on for first
time when compressor starts operating continuously for 7 minutes).
- Indoor heat exchanger temperature at compressor start -3°C < current heat exchanger temperature for 1 minutes.
• During this error, four-way valve error is displayed; compressor is shutdown.
9.7.9. High-pressure Switch Disconnection Error Detection Control
• High-pressure switch disconnection is detected when high-pressure switch input continuously open for 1 minutes while the
compressor shutdown.
• During this error, high-pressure switch error is displayed.
9.7.10. Low-pressure Switch Disconnection Error Detection Control
• Low-pressure switch disconnection is detected when low-pressure switch input continuously open for 1 minutes while
compressor shutdown.
• During this error, low-pressure switch error is displayed.
9.8. Test Run
• Test run is necessary after installation is completed.
• To enable forced cooling test run, at outdoor PCB, set the DS1 to ON position and DS2 to OFF position.
• Press Test Run button at outdoor pcb for 1 second.
Sensor Detection Threshold Duration (Sec.) Detection Condition
Discharge Temperature < -4.5
°
C or 201.8
°
C 5 Other than compressor start control
and compressor ON
Outdoor Heat Exchanger < -50.5
°
C or 103.7
°
C 5 Regularly