Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 919

Error display : e12
10
Indoor unit
Red LED 1 time flash
Green LED Keeps flashing
Are unit number
set for see
following?
Defective indoor unit
PCB Replacement
(defective unit number
input circuit)
e28
Error display :
11
Indoor unit
Red LED Stays OFF
Green LED Keeps flashing
Is the remote controller
thermistor connector co-
nnection OK?
NO
Correction
(c) Error diagnosis procedures at the outdoor unit side
At the error diagnosis related to the outdoor unit, check at first the error code of remote controller and the illumination patterns of
norma 1 and inspection display lamps in the same manner as the case of indoor unit.
Then estimate the outline, the cause and the location of error based on the pattern and proceed to the inspcetion and repair. Since the
self diagnosis function by means of the microcomputers of indoor/outdoor units provide the judgement of error of microcomputers
them selves irregularity power supply line, overload, etc. caused by the installation space, inadequate volume of refrigerant etc., the
location and cause of trouble will be discovered without difficulty.
In addition, the display lamps error code of indoor/outdoor unit is kept flashing, (except when the power supply is iterrupted) after
the irregularity is automatically recovered to give irregularity information to the service presonnel. If any mode of higher priority
than the error retained in memory occurs after the reset of error, it is switched to that mode and saved in the memory.
(i) Replacement parts assembly related to the outdoor unit PCB
Outdoor unit PCB, outdoor unit inverter PCB, power transistor module, diode module, capacitor, reactor, noise filter, thermistor,
(heat exchanger, discharge pipe, outdoor temperature), fuse, transformer, etc.
[Address No. combination eroor or addressing is
preformed with the following combinations.]
Outdoor unit
Red LED
Green LED
YES
Unit number
correction
(1)
NO
[Directive remote controller thermistor.]
Red LED
Green LED
Are characteristics of
YES
remote controller therm-
istor OK or is there any
broken wire?
Detective remote controller
thermistor
Stays OFF
Keeps flashing
Note (1)
Outdoor unit
address No.
00 ~ 47
48, 49
Outdoor unit
Stays OFF
Keeps flashing
(1)
YES
NO
Replacement
FDC-HKX
Indoor unit
address No.
48, 49
00 ~ 47
Detectivie remote controller PCB
Replacement (Detective re-
mote thermistor input circuit)
917