Mitsubishi Electric MCF-C13UV-E1 Service Manual page 35

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 of indoor electronic control P.C. board
C
Check both "parts side" and
"pattern side" of indoor
electronic control P.C. board
visually.
Compressor and / or outdoor fan motor does not operate.
Check of outdoor unit
D
MUCF-C13UV-
MUCF-C18UV-
Press EMERGENCY OPERATION
switch. 3-minute time delay works.
Test run operation operates for 30
minutes.
Check voltage to terminal
Yes
block of outdoor unit. Is there
230V AC to terminal block
between 2 - N ?
Check the outdoor fan motor
and compressor.
Check voltage to terminal
Yes
block of indoor unit. Is
there 230V AC to terminal
block between 2 - N ?
Check the continuity of indoor
and outdoor unit connection.
Replace the indoor elec-
tronic control P.C. board.
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.
MUCF-C24UV-
E1
E1
Start
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
230V AC to terminal block
between 2 - N ?
No
Check voltage to terminal
block of outdoor unit. Is
there 230V AC to terminal
block between 3 - N ?
No
Check the outdoor wiring
and conductor relay.
No
No
E1
Start
No
Check the continuity of indoor
and outdoor unit connection.
Yes
No
Check voltage to terminal
block of indoor unit. Is there
230V AC to terminal block
between
Yes
Check the continuity of
indoor and outdoor unit
connection.
35
Trouble of the indoor electronic
control P.C. board.
No
Replace the
indoor elec-
tronic control
3 - N ?
P.C. board.
Yes