Mitsubishi Electric SUZ-SWM40VA Technical & Service Manual page 27

Check of outdoor refrigerant circuit
L
Has the operation stopped
during pump down?
Yes
CAUTION:
Do not start the operation again to
prevent hazards.
The operation has stopped to
prevent the diesel explosion caused
by air trapped in the refrigerant
circuit. Close the stop valve, and
disconnect the power plug or turn
the breaker OFF.
OCH718A
Was the operation started with
the stop valve closed, and was
No
it opened during operation?
No
The refrigerant gas amount may
be 60% or less than the normal
amount. Identify where the gas is
leaking from, and fix the leak.
Note: If the abnormality cannot be reset with remote controllers, it is
27
The unit occasionally stops when the
stop valve is opened or closed during
Yes
operation. Open the stop valve and
start the cooling operation again.
detected in the connected indoor unit. Please refer to the indoor
unit's service manual.