Heating - Mitsubishi Electric MXZ-4C36NAHZ Technical & Service Manual

In case of the test run from outdoor unit, all indoor units operate. Therefore, you cannot detect any erroneous con-
nection of refrigerant pipes and the connecting wires. If it aims at detection of any erroneous connection, be sure
to carry out the test run from remote controller with reference to "(1) Using remote controller."
SW3-1 ON
OFF
SW3-2
SW3-1 ON
SW3-2
ON
Note: After performing the test run, set SW3-1 to OFF.
Setting procedure
1
2
3
When a test run is started by "Using SW3 in outdoor unit", even if it carries out stop instructions by
remote controller, outdoor unit does not stop. A test run is not ended.
In this case, please set SW3 in outdoor unit to off.
inside of the branch box. The electronic expansion valve is opening and closing. The unit is not faulty.
OCH573E
Cooling operation
Heating operation
(Initial setting)
SW3
C D
A Stop
ON
B Cooling
C Operation
D Heating
1 2
A B