Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1079

2
Error display:
Indoor unit
Red LED 2time flash
Green LED Keeps flashing
Outdoor unit
Red LED Stays OFF
Green LED Stays OFF
Note (1) This case is limited to the separate power supplies to indoor/outdoor units. (Combination of (indoor unit) red LED 2
time flash and (outdoor unit) green LED stays off means that the power supply to the outdoor unit has been
interrupted during operation.)
Outdoor unit
Stays OFF or
Red LED
keeps flashing
Stays OFF or
Green LED
Lights continuously
Outdoor unit
Red LED Stays OFF
Green LED Keeps flashing
Notes (1) Check for poor connection (Iooseness, mis-
connection) at outdoor unit terminal block
and broken signal wires between outdoor
units.
(2) Check the poor connection or broken signal
wires between indoor/outdoor units.
[Outdoor unit signal line error, power supply error]
(1)
Did turn off
the power of outdoor
unit during
operation?
(1)
NO
• Blown fuse?
• Broken or loose wire at L , L
1
Phase?
• Was not there the power failure?
Power supply reset
Defective outdoor unit
PCB→Replacement (De-
fective network communi-
cation circuit)
contact between indoor/
YES
Power supply
ON
or N
2
Malfunction due to noise, etc.
Is it
YES
(Out of control CPU of outdoor
normalized?
unit due to noise during power on)
NO
(1)
Signal wire poor
YES
connection at outdoor
unit?
NO
(2)
Signal wire poor
YES
outdoor units?
NO
Power supply reset
Is it
YES
normalized
Defective outdoor unit
PCB→Replacement (De-
fective network communi-
cation circuit)
FDC-HKXR
Repair
Repair
Unit is normal.
(Malfunction by
accidental noise)
1077