Mitsubishi Electric SRK100VNPZJX, Technical Manual

Page: 425 / 509

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424
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WAIT
Communication error at
initial operation (2/3)
– –
Keeps flashing 2 times flash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is DC5V detected
if the inverter power supply connector (CNI2)
is disconnected?
YES
Diagnosis for when the outdoor
control PCB LED is turned off
NO
NO
Shut down the breaker and back on
again the breaker 3 minutes later.
To check method for inverter PCB before
replacment of blown power supply fuse.
YES
Does it reset normally?
NO
YES
Isn’t the outdoor
unit controller power supply fuse
(30A) blown?
Note (1) 1-phase model only
NO
YES
YES
YES
NO
Is AC220/240V or AC380/415V
detected at the noise filter
secondary side?
Isn’t fuse
〔
250V, 2A
〕
on the outdoor control
PCB blown?
NO
YES
Is DC5V
detected on the outdoor control PCB (Between
Œ
-

of CNV)?
NO
YES
Is DC5V detected
if the connector of outdoor unit fan motor
is disconnected?
NO
Is DC255-310V detected at CNA2?
(1)
From previous
page
To next page
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.
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:
Error code
Remote controller:
Indoor
display
RUN light TIMER light
Green LED Red LED
Outdoor
control PCB
Content
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424
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'12 • PAC-T-174