– 190 –
Is 220-230V AC being
supplied to terminal L and N?
If the 25A fuse has blown,
be aware that other parts
may also be defective
(mainly, varister 2, diode
stack, smoothing capactiors,
power module, etc.).
Is the switching power circuit OK?
Has the 3A fuse blown?
Replace any defective parts.
Replace any defective parts.
Check to see whether the
connected C and D cable
correctly? If reversed, correct the
cable connection.
If the 3A fuse has blown, the
transformer, R906, etc. may
also be defective.
See the self-diagnosis lamp
lighting mode.
Is the 25A fuse normal?
Is the power circuit normal?
See the description on
power circuit for details.
Is the 5V being generated
between Pin
④
(0V) and pin
③
(5V)at CN 18 (test pin)?
How did the self-diagnosis
lamp (LD301) light?
Operate the outdoor unit
according to the instruction
"How to operate the outdoor
unit independently"
[
No operation or abnomal operation
]
Yes
Yes
Yes
Yes
No
No
No
CHECKING THE OUTDOOR UNIT ELECTRICAL PARTS
MODEL RAC-50FX8