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CHECKING THE OUTDOOR UNIT ELECTRICAL PARTS
MODEL RAC-25CNH2
[No operation or abnormal operation]
Is 220-240 being supplied to
terminal A and B?
Is the 15A fuse normal?
Is the power circuit normal?
See the description on
power circuit for details.
Is the 5V being generated
between REG 1 fin (0V) and
CN18 (test pin) pin 5 (5V)?
Operate the outdoor unit
according to the instruction
"How to operate the outdoor
unit independently".
How did the self-diagnosis
lamp (LD301) light?
LD301 blinks 10 times:
Half voltage error.
If the 15A fuse has blown, be aware
that other parts may alsobe defective
(mainly, varister 2, diode stack,
smoothing capacitors, power module,
etc.).
Is the switching power circuit OK?
Has the 3A fuse blown?
See the self-diagnosis lamp
lighting mode.
Are the cords, etc. of terminal
board, reactor, diodes, smoothing
capacitors, etc. connected?
Replace any defective parts.
Check to see whether the
connected C and D cable
correctly? If reversed, correct the
cable connection.
Replace any defective parts.
If the 3A fuse has blown, the
transformer, R216, etc. may
also be defective.
If they are loose or disconnected,
insert them securely.
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