Mitsubishi Heavy Industries KXZ Series Service Manual page 76

Error code
Remote control:
WAIT
7-segment display: –
1. Applicable model
All models
(In case that is kept
WAIT
on displaying on the remote
control for more than 2 minutes
after power ON.)
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Fuse blown
• Noise filter anomaly
• Anomalous connection of
wire between PCBs
• Indoor control PCB anomaly
• Remote control anomaly
• Breakage of connecting wires
of remote control
• Outdoor control PCB anomaly
Note:
LED Green Red
Keeps flashing Stays OFF
Indoor
Keeps flashing Keeps flashing
Outdoor
5. Troubleshooting
Diagnosis
is kept on
WAIT
displaying on the remote
control for more than 2
minutes after power ON.
Does
outdoor green LED keep
flashing?
YES
Does
indoor green LED keep
flashing?
YES
Does
outdoor red LED flash
2 times?
YES
Are
the wires between indoor
and outdoor units
connected properly ?
YES
Is
AC380-415V detected
between L1-L2, L2-L3, L3-L1
respectively at outdoor
terminal block?
YES
Is
AC220-240V detected
between L-N at indoor
terminal block?
74
-
Content
WAIT
Refer next page.
A
NO
NO
NO
NO
NO
NO
YES
-
'14 • KX-SM-221
(4)
Countermeasure
Indoor control PCB
anomaly
 Replace it.
Indoor control PCB
anomaly
 Replace it.
Remote control anomaly
 Replace it.
Breakage of wires for
remote control
 Replace it.
Correct the connecting
wires between indoor and
outdoor units.
Outdoor control PCB
anomaly
 Replace it.
Breakage of connecting
wire
Noise.
Indoor control PCB
anomaly
 Replace it.