Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 199

Error code
Remote control:
WAIT
1. Applicable model
Models FDC200, 250VSA
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Faulty noise filter
• Faulty indoor unit control
PCB
• Faulty outdoor unit control
PCB
• Faulty inverter PCB
• Faulty fan motor
Note:
LED Green Red
Keeps flashing Stays OFF
Indoor
Keeps flashing 2-time flash
Outdoor
5. Troubleshooting
Diagnosis
Diagnosis for when the outdoor unit
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?
Is AC380/415V
detected at the noise filter
secondary side?
YES
Is DC280/373V detected at CNA2?
YES
Isn't fuse
〔250V, 2A〕 on the outdoor unit control
PCB blown?
YES
Is DC5V
detected on the outdoor unit control PCB (Between
- of CNV)?
YES
Is DC5V detected
if the connector of outdoor fan motor
is disconnected?
YES
Is DC5V detected
if the inverter power source connector (CNI2)
is disconnected?
198
-
Communication error at
Content
initial operation (2/2)
(Models FDC200, 250VSA only)
YES
NO
NO
NO
NO
NO
NO
YES
-
'19 • PAC-T-327
Countermeasure
Normal. (Malfunction by
noise)
Replace noise filter.
Check connection of diode
stack and electrolytic
capacitor by refering main
electrical circuit diagram.
Defective outdoor unit
control PCB ➞ Replace.
Defective outdoor unit
control PCB ➞ Replace.
Defective outdoor fan
motor.
Defective inverter PCB
➞ Replace.
Defective outdoor unit
control PCB ➞ Replace.