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1. Power does not come on (no operation)
Is 220-240V AC being
generated
between terminals A oe B on the
NS emaagpromne
|
a aap ragaeaerd being generated
>}
cheek AC outlet and breaker, and
terminal board?
2 Ce
a
>| Shea any defective part.
Yes
Check the power cord, power
No
switch and terminal board, and
is 39V DC being generated
Is 220-240V AC being generated
fopalt any Selective pad
between terminals C and D on the =>
between terminals A and B on the
terminal board?
outdoor unit eh board?
Check the indoor/outdoor unit
connection cable, and correct any
defective section '(wrong
connection, incomplete insertion).
Is 39V DC
a generated
between terminalis C and D on the | Yes
Begonia
Cans on he
unit ay board?
Yes
Yes
ae
wires C and D
eerie:
Correct the cable connection.
Check the outdoor unit power
circuit, and repair the defective
section
Are control voltages (12V,5V)
|
No
Check according to the proper
being generated normally?
SS
meted for checking the power
ve
Do the air Vv
sparen wen pone och
initial | Yes
Check the Indication P.W.B.
Operation when the pone switch
ei
er i
oc |E=—————_)]
Seton corsa it cong
connection cord and
Sonactn cord and at woking
receiving
is turned on and off
unit.
ve
Is the microcomputer clock signal
(8MHz at pins 6, (8) being
generated normally?
wy Yes
Replace the control P.W.B.
ae
Perform final operation check.
ne
Replace the microcomputer and
oscillator.
~174-
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