mundoclima MUCO-H6T Service Manual page 47

2. Compressor low pressure protection (E3)
the two terminals led out from the switch are
Start
Is the terminal of low
pressure switch is properly connected?
yes
no
Is the system pressure higher
than the operation pressure value of
low pressure switch?
no
no
In power-off status, check if
put through?
yes
no
The mainboard is abnormal;
replace the mainboard
End
Reconnect it firmly to make
no
sure it is properly contacted
Malfunction is
eliminated
Charge refrigerant according
yes
to the system requirement
Malfunction is
eliminated
Replace the low
no
pressure switch
Malfunction is
eliminated
yes
47
Service Manual
yes
yes
yes