Question:
How does the F9 fault manifest in the AP140S2SK1FA, AP105S2SK1FA(H), AP140S2SK1FA(H), AP160S2SK1FA(H) models?
Answer:
(1) When the compressor is running:
If the low pressure switch disconnects continuously for 1 minute (OFF: 0.05MPa), the compressor stops, and the outdoor unit outputs an alarm signal.
After 3 minutes, it can be restarted and put into operation. At this time, the alarm is temporarily cleared, and the fault code is not sent to the indoor unit.
If the low pressure switch protection fault occurs continuously 3 times within 60 minutes, the fault is determined, the system stops, and a fault code is sent to the outdoor unit.
(2) When the compressor is not running:
If the low pressure switch disconnects continuously for 30 seconds (OFF: 0.05MPa), an alarm signal is output once.
