Mitsubishi SCM80ZA Manual page 62

(5) How to make sure of remote controller
(1)
Is remote
NO
controller
normal?
YES
Again pushing
operating switch
YES
Operating the unit?
NO
Does backup
switch operates?
YES
Operating the unit.
NO
Control problem on
main unit
(6) Indoor electrical components inspection flow-chart
Is there voltage between terminal
blocks 1 and 2 ? (AC 220/230/240 V)
YES
Is the fuse burnt out? (3.15 A)
YES
Is there voltage between CNC (1)
and (2) on the secondary side of the
transformer? (Approx. 12 V)
YES
Is the voltage between terminal
blocks 2 and 3 oscillating between
DC 0 and 12V?
YES
Indoor electrical components
are normal.
112
Remote controller
Note (1) How to check the remote controllre
defects
Abnormality is not
found.
Replace the display.
Is the unit
YES
operable with remote
controller?
NO
Defective remote
controller
NO
Inspect power source
for outdoor unit.
NO
Replace fuse.
NO
Replace the transformer.
NO
Replace printed
circuit board.
(a) Press the reset switch of the remote controller.
(b) If all LCD are displayed after zero (0) display, it is
basically normal.
Normal
Note (1) Excepted 50 model
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