Mitsubishi Electric FDT125VNVF Technical Manual page 372

Error code
Remote controller:
WAIT
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Faulty noise filter
• Faulty indoor control PCB
• Faulty outdoor control PCB
• Faulty inverter PCB
• Faulty fan motor
Note:
LED Green Red
Keeps flashing Stays OFF
Indoor
Keeps flashing 2 times flash
Outdoor
5. Troubleshooting
Diagnosis
Diagnosis for when the outdoor
control PCB LED is turned off
From previous
Shut down the breaker and back on
page
again the breaker 3 minutes later.
NO
Does it reset normally?
Isn't the outdoor
unit controller power supply fuse
(30A) blown?
To check method for inverter PCB before
replacment of blown power supply fuse.
YES
Is AC220/240V or
AC380/415V detected at the noise filter
secondary side?
YES
Model 71-140
Is DC255-310V detected at CNA2?
Model 200, 250 Is 220/240
detected at CNW2?
YES
Isn't fuse
〔250V, 2(3)A〕 on the outdoor control
PCB blown?
YES
Is DC5V
detected on the outdoor control PCB (Between
�-� of CNV)?
YES
Is DC5V detected
if the connector of outdoor unit fan motor
is disconnected?
YES
Is DC5V detected
if the inverter power supply connector (CNI2)
is disconnected?
371
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Content
Communication error at
initial operation (2/3)
YES
Note (1) 1-phase model only
(1)
NO
To next page
NO
NO
Note (2) Value in ( ) are for the
model 200, 250.
(2)
NO
NO
NO
NO
YES
-
'12 • PAC-T-174
Countermeasure
Normal (Malfunction by
noise)
Replace noise filter.
Check connection of diode
stack and electrolytic
capacitor by refering main
electrical circuit diagram
Defective outdoor control
PCB ➞ Replace.
Defective outdoor control
PCB ➞ Replace.
Defective outdoor fan
motor
Defective inverter PCB
➞ Replace.
Defective outdoor control
PCB ➞ Replace.