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9
Troubleshooting
Analysis in this section is used for D.C. Variable Frequency Series. Before analysis, you can diagnose
according to the code displayed on indoor unit or indicator display on outdoor unit. (Refer to Malfunction
display section).
Air
conditi
oner
cannot
start up
Breaker trippe
d
or fuse burnt out
Air conditioner
does not response
after powered on.
(The buzzer does
not sound after the
plug is connected
and the unit does
not response after
the remote
controller is used
to turn it on)
When the breaker is set ON, it will
trip at once
Remote
controller does
not receive signal
(When powered
on, the buzzer
will send out a
sound, unless it is
broken)
When the unit is turned on, the
breaker will trip in a few minutes
N
o power supply
The power plug is not or poorly
connected
Controller fuse is burnt out
Loose or poor contact of transformer
connection, or transformer malfunction
The controller is broken
Batteries of remote controller are low
Malfunction of remote controller
Loose or poor connection of receiving
head
Receiving head is broken
Measure t
h
e
i
nsu
l
at
i
ng res
i
stance
for grounding to confirm whether
there is electrical leakage or short
circuit in the unit
Insulation malfunction of line or componen
in the air conditioner. Insulation breakdow
occurs after radiation, which causes shor
circuit or electricity leakage. Measure
insulating resistance or use one-by-on
elimination method;
Malfunction of fuse. Replace it.
Check power supply circuit
Check and plug well plug, make
loosen contact firm
Change control fuse
Secure the wire connection: measure
the output voltage of the transformer
and replace it if the value is wrong
Re
p
lace the controlle
r
Chan
g
e batter
y
First press the "AUTO" button of the
manual switch. If there is no response,
check according to the above method;
if it is normal after the button is
p
ressed, check if the installation
location and wire connection of the
receiving head are correct. If correct,
replace the receiving head, or the
remote controller.
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