Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 62

Error code
Remote controller:
WAIT
7-segment display:
1. Applicable model
All models
(In case that is kept
WAIT
on displaying on the remote
controller 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 controller anomaly
• Breakage of connecting wires
of remote controller
• 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
controller 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
teminal block?
60
–
Content
WAIT
A
NO
NO
NO
NO
NO
NO
YES
–
(4)
Countermeasure
Refer next page
Indoor control PCB
anomaly
 Replace it
Indoor control PCB
anomaly
 Replace it
Remote controller anomaly
 Replace it
Breakage of wires for
remote controller
 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