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.
Replace the fuse.
Trouble of the indoor electronic
control P.C. board.
Replace the varistor.
Yes
Check both “parts side”and “pattern
side” of indoor electronic control P.C.
board visually.
No
Is varistor(NR11)burnt?
Yes
Is fuse(F11)blown?
Check of outdoor unit
D
Compressor and outdoor fan do not operate.(Only indoor fan operates.)
Start
Press EMERGENCY OPERATION
switch. 3-minute time delay works.
Test run operation operates for 30
minutes.
Check the outdoor DEICER P.C.board and out-
door 52C compressor contactor at first, then
check the outdoor fan motor and compressor.
Check the continuity of indoor and outdoor unit
connection.
No
No
Yes
Yes
Check voltage to terminal
block of indoor unit. Is there
220-240V AC to terminal
block between 2 - N ?
Check voltage to terminal
block of outdoor unit. Is there
220-240V AC to terminal
block between 2 - N ?
No
Be sure to check both fuse
and varistor in any case.
Replace the indoor electronic control
P.C.board.
MCFH-13NV - MCFH-18NV -
E3E4
OB267--2.qxp 01.4.13 1:01 PM Page 47
To Next Page
Loading...
