Mitsubishi MCFH-13NV Service Manual page 47

Check of indoor electronic control P.C. board
C
The unit doesn't operate with the
remote controller.
Also, the OPERATION INDICATOR
lamp doesn't light up by pressing
the EMERGENCY OPERATION
switch.
Check both "parts side"and "pattern
side" of indoor electronic control P.C.
board visually.
Check of outdoor unit
D
Compressor and outdoor fan do not operate.(Only indoor fan operates.)
MCFH-13NV - MCFH-18NV -
E4
Yes
Check the outdoor DEICER P.C.board and out-
door 52C compressor contactor at first, then
check the outdoor fan motor and compressor.
Yes
Check the continuity of indoor and outdoor unit
connection.
Replace the fuse.
Yes
Is fuse(F11)blown?
Be sure to check both fuse
and varistor in any case.
Is varistor(NR11)burnt?
Yes
Replace the varistor.
E3
Press EMERGENCY OPERATION
switch. 3-minute time delay works.
Test run operation operates for 30
minutes.
Check voltage to terminal
block of outdoor unit. Is there
220-240V AC to terminal
block between 2 - N ?
Check voltage to terminal
block of indoor unit. Is there
220-240V AC to terminal
block between
Replace the indoor electronic control
P.C.board.
47
No
Trouble of the indoor electronic
control P.C. board.
No
Start
No
2 - N ?
No