Mitsubishi Heavy Industries SRK20ZJX-S Service Manual page 88

Error code
Remote controller:
WAIT
1. Applicable model
All models
When the remote controller
LCD displays " WAIT
minutes after the power on.
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Blown fuse
• Faulty outdoor sub PCB
• Connection between PCB's
• Faulty indoor control PCB
• Defective remote controller
• Broken remote controller wire
Note: If any anomaly is detected during communication, the error code E5 is displayed. Inspection procedure is same as above. (Excluding
matters related to connection) When the power supply is reset after the occurrence of E5, the LED will display "
continues. If the breaker ON/OFF is repeated in a short period of time (within 1 minute), "
turn the breaker off and wait for 3 minutes.
LED Green
Indoor Keeps flashing Stays OFF
Outdoor – Stays OFF
5. Troubleshooting
" 2
The remote controller LCD
displays " WAIT
2 minutes after the power on.
Isn't blown
the power supply fuse (15A or 20A) on the
outdoor unit controller?
YES
Is AC220/240V
detected at the secondary side of
outdoor sub PCB?
YES
green LED of indoor unit
flashing?
YES
Are wires
connected properly between
the indoor and the outdoor
YES
Is approx.
DC20V detected between -
on the outdoor unit terminal
YES
Is approx.
DC20V detected between -
on the indoor unit terminal
Red
Content
Communication error at
initial operation (1/3)
Diagnosis
Turn the breaker off once and then
"
back on again 3 minutes later.
Is normal condition restored?
NO
NO
Is the
units?
block?
block?
87
- -
'10 • SCM-SM-094
Countermeasure
Replace the
See next page.
power supply fuse.
Defective outdoor sub
NO
PCB Replace.
Defective indoor control
NO
PCB Replace.
Replace indoor control
PCB.
Correct connection wires
NO
between indoor and
outdoor units.
Defective outdoor sub
NO
PCB Replace.
Defective connection wire
(broken wire)
NO
Noise
Defective indoor control
YES
PCB Replace.
WAIT
"
may be displayed. In such occasion,
WAIT
"
if the anomaly