Mitsubishi FDT71VH User Manual

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93
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'20 • PAC-SM-351
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
WAIT
Communication error at
initial operation (2/3)
Keeps ashing
Keeps ashing
Stays OFF
2-time ash
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
Is DC5V detected
if the inverter power source connector (CNI2)
is disconnected?
NO
Diagnosis for when the outdoor unit
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 source fuse.
YES
Does it reset normally?
NO
YES
Is the outdoor
unit control power source fuse
(71:20A) blown?
Note (1) 1-phase model only
YES
YES
YES
NO
NO
Is AC220/240V or
AC380/415V detected at the noise filter
secondary side?
Is fuse
〔250V, 2A〕 on the outdoor unit control
PCB blown?
YES
YES
Is DC5V
detected on the outdoor unit control PCB (Between
➀ -➃ of CNV)?
NO
YES
Is DC5V detected
if the connector of outdoor fan motor
is disconnected?
NO
Is DC255-310V detected at CNA2?
(1)
To next page
From previous page
Normal (Malfunction by
noise)
Replace noise lter.
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.
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:

Mitsubishi FDT71VH Specifications

General

Brand	Mitsubishi
Model	FDT71VH
Category	Air Conditioner
Language	English