-
95
-
YES
YES
DC approx. 12V
NO
NG
NO
DC approx. 0V
Check the inverter before replacing the power fuse.
The “ WAIT ” display remains the same
in the remote controller’s LCD even after the
power supply has been turned on 2 minutes.
Is the LED on the outdoor
unit’s control PCB flashing?
Is the the indoor green
LED flashing?
Does the outdoor unit control
PCB red LED flashing 2 times?
Are the wires connecting the indoor
and outdoor units connected
according to specifications?
Measure the voltage between
terminals
2
and
3
of the outdoor
unit’s terminal block.
Is the inverter PCB LED
(green) flashing?
Are communications lines Cn1 1-2
between the outdoor unit control PCB
and inverter control PCB connected?
Measure the voltage between Cn1
1
and
2
on the communications
connector (See pages 175, 176.)
Indoor unit
control PCB is
defect.
Indoor unit control PCB is
faulty.
Remote controller is faulty.
The X or Z lines in the remote
controller arc disconnected.
Are the lines connecting
the indoor and outdoor
units normal?
Connection line is
defect (disconnected),
noise.
Connect.
Connection
lines
disconnected.
YES
YES
YES
NO
NO
NO
Is the noise filter secondary
side AC 220 ~ 240V?
OK
NO
Is the outdoor unit’s controller
power supply fuse 20A
disconnected?
Are the connection lines
between the noise filter and
inverter PCB good?
Area the reactor connections
good? Are they disconnected?
Replace the
inverter PCB.
Disconnect the breaker
once, then after 3 minutes,
turn the breaker on again.
Diagnosis if the
inverter PCB LED
1 (green) is off.
Connect the
lines
correctly.
Connect/
replace the
reactor.
Replace the
noise filter.
Normal
recovery.
Is there a short between
phases in the noise filter?
Is the indoor green LED
flashing?
Is the fuse on the indoor unit
control PCB OK?
Is the outdoor red LED
flashing 2 times?
Are the wires connecting the indoor
and outdoor units connected according
to specifications?
Measure the voltage between
terminals
2
and
3
of the
outdoor unit’s terminal block.
Is the voltage on the outdoor
unit’s transformer secondary
side (red – red) AC15V ?
Is the voltage between the red and
black wires in the remote
controller DC10~11V when the
remote controller is disconnected?
Remote controller does not display
after the power is turned on.
Is there a short between phases in
the inverter PCB input terminals?
Is the electrolytic condenser
abnormal?
Is the power transistor module
separated or burned out?
Replace the noise
filter.
Fuse
exchange
Transformer
defect
The remote
controller
wires are
short
circuited.
Repair the
connection
lines.
Remote
controller
defect
Outdoor unit control
PCB defect
Connection wires are
faulty (disconnection)
Noise
The indoor/outdoor
control PCB is faulty.
The remote controller
is faulty.
The X or Z lines in
the remote controller
are disconnected.
Indoor unit
control PCB
defect
Replace the
electrolytic
condenser.
Is the reactor faulty?
Replace the
reactor.
Replace the
inverter PCB.
Replace the power
supply fuse.
Indoor unit control
PCB is defect.
Indoor unit control
PCB is defect.
A
Outdoor unit
control PCB is
defect.
Measure the voltage between
terminals 2/N and
3
of the indoor
unit’s terminal block.
Measure the voltage between
terminals 2/N and
3
of the
indoor unit’s terminal block.
YES
YES
YES
YES
YES
YES
NO
YES
NO
NO
NO
NO
NO
Approx. 20V DC
Approx.
0V DC
Approx. 0V DC
Approx. 20V DC
NO
NO
NO
NO
YES
YES
NO
YES
YES
YES
YES
YES
DC approx. 20V
DC approx. 20V
DC approx. 0V
DC approx. 0V
YES
YES
NO
NO
NO
YES
NO
A
2
Error display “
WAIT
”
Indoor – outdoor communications trouble
(Initial (when the power is turned on)
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
2 time flash
Keeps flashing
Red LED
Green LED
Outdoor unit
If trouble occurs during communications, the error code E5 is displayed (Outdoor, Red LED flashes 2 times). The check procedure is as shown below. (However, excluding
connection related problems) Also, if the power supply is reset after E5 occurs, if the trouble is intermittent, it will be displayed in the LCD(“ WAIT ”).
Notes (1)
If the breaker power supply is turned on again in a short time
(within 1 minute), a “ WAIT ” message may be displayed.
In this case, turn the breaker OFF and wait 3 minutes.
