Mitsubishi Heavy Industries FDTC50ZHXV Technical Manual page 292

Error code
Remote controller: WAIT
1. Applicable model
Model FDC71 - 250
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Blown fuse
• Faulty noise filter
• Misconnection between PCB's
• Blown fuse on single phase
model
• Faulty indoor control PCB
• Defective remote controller
• Broken remote controller wire
• Faulty outdoor control PCB
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
A
Shut down the breaker and back on
again the breaker 3 minutes later.
NO
Isn't the outdoor
unit controller power supply fuse
(30A) blown?(1)
To check method for inverter PCB before
replacment of blown power supply fuse.
YES
Is AC220/240V
detected at the noise filter
secondary side?
YES
Model 71 – 140
Is DC255-310V detected at CNA2?
Model 200, 250
Is 220/240V detected at
CNW2?
YES
Isn't F1
(250V, 2A) on the control
PCB blown?
YES
Is DC5V
detected on the control PCB (Between
�-� of CNFAN)?
YES
Is DC5V detected
if the connector of outdoor unit fan motor
is disconnected?
YES
Is DC5V detected
if the inverter power supply connector (CNI3)
is disconnected?
282
–
Content
WAIT
(Model 71 – 250)
Does it reset normally?
YES
Note (1) Model 71 – 140 (1-phase model) only
NO
B
NO
NO
NO
NO
NO
NO
YES
–
(2/3)
Countermeasure
Normal (Malfunction by
noise)
See next page.
Replace noise filter.
Check connection of diode
stack and electrolytic
capacitor by refering main
electrical circuit diagram
Replace control PCB.
Defective outdoor control
PCB
Defective outdoor fan
motor
Defective inverter PCB
Defective outdoor control
PCB