3
4
Troubleshooting
8.Troubleshooting
When setting the circuit breaker at
"ON", it will be tripped off immediately
When the A/C is turn to "ON", the circuit
breaker will be tripped off in a few minutes
Ground and measure the insulation
resistance, confirm whether the A/C
is leaking or short circuit
Insulation malfunction for A/C's circuit
or parts. The insulation will be brokendown
after heating and then it leads to short-circuit
or leakage. Measure the insulation resis-
tance; malfunction of circuit breaker and
please replace the circuit breaker.
No power supply
Check the power supply circuit
The power plug hasn't been inserted
well or poor connection
Check and insert the plug well
Controller's fuse is burnt out
Replace the fuse of controller
Wire connection of the transformer is
loosened, or the plug hasn't inserted
well, or
malfunction of the transformer
Connect the wire firmly; measure the
output voltage
of transformer, if it's not
correct, then replace the transformer
Controller is broken
Replace the controller
Battery capacity of the remote controller
is insufficient
Replace the baterry
Malfunction of the remote controller
Receiving head is loosened or it hasn't
been inserted well
Receiving head is broken
Press AUTO" button of hand swith at
first(or pull the switch to AUTO" if it has no
action, then check it according to the above
method ; If it runs normally after pressing
the button, then check whether the installa-
tion place for receiving head and the conn-
ection line is correct or not , if they are
correct, please replace the receiving head
or remote controller
Remote contrller can't
receive the signal( after
energized, the buzzer will
give out a sound, except
the buzeer is broken)
A/C has no action
after it's energized.
(after inserting the plug,
the buzzer can't give
out a sound and the
A/C can't be turned on
by remote controller
Breaker is tripped over
or the fuse is burnt out
A/C
can'
be
started
up
8.1 General Part
Notice
1. Preparation before maintenance
Step 1: Firstly, confirm the model of the inverter A/C which needs repairing, and then find out model of main parts that can be damaged
easily and the material encode, especially the controller of outdoor unit;
Step 2: Basing on the malfunction phenomenon reflected by user, judge the parts which needs for replacing initially, and bring those
parts with you for maintenance.
Step 3: As for repairing the inverter A/C, you should not only bring the common tools, such as screwdriver, wrench, etc, but also you
should bring universal meter and ammeter with you.
2. During the maintenance, don’t touch any terminals before the voltage between P and N of power module is measured less than 50V
to avoid electric shock.
3. Before or after the maintenance, you should check whether the users’ power socket, terminal block on indoor/outdoor unit and all
connectors on main board (especially the main board of outdoor unit, power module and PFC module) are loosened or not.
