Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 913 / 1106

FDC-HKX
911
ON
OFF
ON
OFF
ON
OFF
Heating temp. shift + 3
°
C
Normal
Test run of condensate pump motor
Normal
Reverse Invalid
Rus stop
Input
Signal
SW
5-1
SW
5-2
SW
5-3
837
832
835
Switch Function Reference page
(ii) Parts layout on the indoor unit printed circuit board
●
Replacement procedure of indoor unit micrcomputer printed circuit board
Microcomputer printed circuit board can replaced with following procedure.
1) Confirm the parts numbers. (Refer to the following parts layout rdrawing for the location of pats number.)
●
Model select switch (SW6)
●
Function of DIP switches
(iii) Check method when the error code is displayed
Remote controller or Indication board: Inspection LED, error code
Indoor unit PCB: Red LED ( inspcetion display), Green LED ( CPU. normal display )
Outdoor unit PCB: Red LED ( inspcetion display), Green LED ( CPU. normal display )
(iv) Check procedure depending on indication lamps (For the indoor unit)
The next page error diagnosis is applicable to cases where only 1 unit is installed in a network unless stated otherwise but the
check method is same even if there are multiple units on the network. Except the network occupation state due to out of control
indoor unit CPU, the error display indicates the state of respective units. Check each unit specified by the error display as
explained on next page.
●
Function of jumper wires
Name Function
With
Setting of 4 position angle of louver
Setting of 4 position angle of louver
4 position louver control : Valid
Filter sign : Valid
Filter sign : Invalid
Normal operation operable
Operation permission prohibited
4 position louver control : Invalid
Heating thermostat OFF - Intermittent
operation
Expansion valve aperture - Fixed at
current aperture.
Expansion valve aperture - Normal
Impossibility
Spare
Spare
Expansion valve aperture - Fixed at
new aperture.
Expansion valve aperture - Fixed at
new aperture.(except J71, 90)
Automatic detection of expansion valve
aperture opening (only for J71, 90)
Heating thermostat OFF - Stop
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
With
None
(1)
With
None (1)
With
None
(1)
With
None
(1)
J1
J2
J3
J4
J5
J7
J8
J6
(2)
J6
(2)
Note (1) "None" means that jumper wire is not provided
on the PCB or the connection is cut.
(2) Only FDT series has the following control.
Parts No.
PJA505A073ZA
PJA505A074ZA
Model
FDTS, FDR, FDUM, FDE, FDK, FDFL, FDFU
FDT, FDTW
SW
6-1
SW
6-2
SW
6-3
SW
6-4
Switch
22 28 36 45 56 71 90 112 140
Model
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
ON
Control selection
Model selector
switch
Transformer
primary side
Transformer
secondary side
Power supply
connector for PCB
( )
Indoor unit number
address switch
Outdoor unit number
address switch HA connector
Return air
thermistor
Heat exchanger
thermistor Indoor and outdoor
unit transmission
Limit switch input
for the auto swing