Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1083

10
Error display:
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
YES
Power transistor
overheating (1)
Note (1) The LD2 on the inverter control PCB lights for 3 minutes. Fin thermostat set value: 90°C open/83°C close
11
Error display:
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Remarks: When current-cut occurs immediately after a start (the Hz value does not increase), check the LD3 on the inverter PCB if an error
code is not indicated on the remote controller and the compressor does not operate. When this LD3 is ON, see the next page.
Is the current
(U,V,W) of the
compressor at the
normal level?
NO
• Is the power supply voltage
correct (not too hight)?
• Are the power supply wires
oppropriate(not too thin)?
• Is not it operated under
overload
Notes (1) The LD3 lights for 3 minutes.
(2) For details of the check procedure, see the next page.
[Power transistor overheating]
Outdoor unit
Red LED 4 time flash
Green LED Keeps flashing
Is the
Does
outdoor unit
YES
the
installation
FM
O
space
rotate?
proper?
NO NO
Repair
[Current cut]
Outdoor unit
Red LED 1 time flash
Green LED Keeps flashing
YES
• Isn't the compressor locked?
• Is the insulation or winding resistance of the
compressor motor proper?
• Is the electronic expansion valve closed?
• Is the installation space of indoor/outdoor unit
adequate?
• Is there any short circuit on the indoor/outdoor
unit
• During cooling: Is FM operating?
O
• At heating:
• Is FM operating?
1
• Is the service valve (gas side) opened fully?
• Is the filter clogged?
Does the
YES YES
IM (Inverter
cooling fan)
rotate?
NO
YES
Power supply
reset
YES
Unit is normal
(Malfunction by
accidental noise)
FDC-HKXR
Defective
inverter
(Refer to 1090 page)
NO
Defective
inverter
(Refer to 1090 page)
1081