Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 927

Error display : e4 1
13
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Power transistor
overheating
(1)
Note (1) The LD2 on the inverter control PCB lights for 3 minutes. Fin thermostat set value : 118°C open
e42
Error display :
14
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Remarks : When current-cut occurs immediately after 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
1 time flash
Red LED
Keeps flashing
Green LED
Is the
Does
outdoor unit
YES
the
installation
FM
O
space
rotate?
proper?
NO
Repair
[Current cut (CM ) ]
1
Outdoor unit
1 time flash
Red LED
Keeps flashing
Green LED
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 operaing?
O
• At heating:
• Is FM operaing?
1
• Is the service valve (gas side) opened fully?
• Is the filter clogged?
Does the
YES
IM (Inverter
cooling fan)
rotate?
NO NO
YES
Power supply
Unit is normal
(Malfunction by
accidental noise)
FDC-HKX
Defective
YES
inverter
(Refer to 933 page)
NO
Defective
inverter
reset
(Refer to 933 page)
YES
925