Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 192

Error code
Remote control:
WAIT
1. Applicable model
Models SRC40-60
When the remote control LCD
displays " " 2
WAIT
minutes after the power on.
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Blown fuse
• Faulty outdoor unit PCB
• Connection between PCB's
• Blown fuse on single phase
model
• Faulty indoor unit control
PCB
• Defective remote control
• Broken remote control wire
Note: If any anomaly is detected during communication, the error code E5 is displayed. (Outdoor unit red LED flashes twice.) Inspection
procedure is same as above. (Excluding matters related to connection) When the power source is reset after the occurrence of E5, the
LED will display "
WAIT
"
" may be displayed. In such occasion, turn the breaker off and wait for 3 minutes.
WAIT
LED Green Red
Keeps flashing Stays OFF
Indoor
5. Troubleshooting
The remote controller LCD
displays " "
WAIT
2 minutes after the power on.
Isn't blown
the power source fuse (20A) on the outdoor
unit control?
YES
Is AC220/240V
detected at the secondary side of
outdoor unit sub PCB?
YES
Are OK the
connection wires between the
outdoor sub and the main
PCB'S?
YES
Isn't F10 fuse (250V, 10A) blown.
YES
Is the
green LED of indoor unit
flashing?
YES
Is the
red LED of indoor unit flashing
twice?
YES
Are wires
connected properly between
the indoor and the outdoor
units?
YES
Is approx.
DC20V detected between
on the outdoor unit terminal
block?
YES
Is approx.
DC20V detected between -Ž
on the indoor unit terminal
block?
"
if the anomaly continues. If the breaker ON/OFF is repeated in a short period of time (within 1 minute),
-
Communication error at
Content
initial operation (1/3)
(Models SRC40-60)
Diagnosis
Turn the breaker off once and then
back on again 3 minutes later.
Is normal condition restored?
NO
Replace the
NO
power source fuse.
See next page.
NO
NO
NO
NO
NO
NO
-Ž
2/N
NO
NO
YES
191
-
'19 • PAC-T-327
Countermeasure
Defective outdoor unit
PCB → Replace.
Connect properly.
Replace fuse.
Defective indoor unit
control PCB → Replace.
Replace indoor unit control
PCB.
Defective remote control
→ Replace.
Broken remote control
wire Y → Replace.
Correct connection wires
between indoor and
outdoor units.
Defective outdoor unit
PCB → Replace.
Defective connection wire.
(broken wire)
Noise.
Defective indoor unit
control PCB → Replace.