Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 920

FDC-HKX
(ii) Parts layout on the outdoor unit PCB
PCB power supply
connector (Secondary side)
LED (red)
Signal line
(Indoor unit)
Outdoor temp.
Under-domo
Discharge
gas thermistor
Heat exchanger
thermistor
● Replacement procedure of outdoor unit microcomputer printed circuit board.
Microcomputer printed circuit board can replaced with following procedure.
1) Confirm the parts numbers. (Refer to the following parts layout drawing for the location of pats number.)
Parts No.
PCB505A026BN
918
7-segement indicator
LED (green)
Outdoor unit Failure
Operation
number address
output
setting switch
Outdoor unit
(SW:Order or 10)
number address
setting switch
(SW:Order of 1)
• Function of DIP switch
Name
ON
SW
3-1
OFF
ON
SW
3-2
OFF
ON
SW
3-3
OFF
ON
SW
3-4
OFF
ON
SW
3-5
OFF
ON
SW
3-6
OFF
ON
SW
3-7
OFF
ON
SW
3-8
OFF
PCB power supply
connector (Secondary side)
Selector switch (SW4) OF
7-segement indicator
Name
External input level
With
J1
(1)
None External input pulse
Defrosting - Normal
With
J5
(1) Defrosting - Cold weather region
None
Snow protection control - None
With
J6
(1)
None Snow protection control - With
Jumper
Model
FDCJ140HKXE2B
FDCJ224HKXE2B
FDCJ280HKXE2B
FDCP140HKXE2B
FDCP224HKXE2B
FDCP280HKXE2B
Note (1) "None" means that jumper wire is not provided on the PCB
or the connection is cut.
Model
All models
Function
Inspection LED reset
Normal
Backup operation - With
Backup operation - None
Service
Normal
Unmatch check
Nromal
Test run operation
Normal
Test run operation - Cooling
Test run operation - Heating
Forced cooling/heating
Normal
Test mode
None
Function
J2 J3 J4
wire
(1) (1)
None None
(1)
None With With
With With
(1) (1)
None None
(1)
None
(1)
None With
With With