Mitsubishi Heavy Industries KXZ Series Service Manual page 77

Error code
Remote control:
WAIT
7-segment display:
1. Applicable model
All models
(In case that LED on outdoor
control PCB stays OFF.)
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
Stays OFF Stays OFF
Indoor
Stays OFF Stays OFF
Outdoor
5. Troubleshooting
Diagnosis
In case that LED on
outdoor control PCB stays
OFF.
From previous page.
A
NO
Is
power fuse (5A) on the
outdoor conrol PCB
blown?
YES
Is
AC380-415V detected at
secondary side of noise
filter?
YES
Are
connecting wires between
noise filter and inverter PCB
connected properly?
YES
Is
the connection of
connecting wire of reactor
OK?
YES
Is
there any anomaly on
outdoor fan motor?
75
-
Content
WAIT
Once turn OFF the breaker
and turn ON it again at 3
minutes after power OFF.
Does it become normal?
YES
NO
Check inverter before
replacement of 52C.
B
Refer next page.
NO
NO
NO
NO
YES
-
'14 • KX-SM-221
(5)
Countermeasure
Normal
(Malfunction by temporary
noise.)
Replace noise filter.
Connect the connecting
wire properly.
Correct connection.
(In case of breakage of
wire replace it.)
Outdoor control PCB
anomaly
 Replace it.
Outdoor fan motor
anomaly
 Replace it.