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9
TROUBLESHOOTING
In addition to the check code on the remote controller of the indoor unit, a trouble of the outdoor unit can be
diagnosed by 7-segment display of the control P.C. board of the outdoor unit. Make good use of this function for
various checks. After check, return each bit of Dip switch to OFF position.
n Segment display and check code
Rotary switch
setup value
SW01 SW02
SW03
1
1
1
Check code of outdoor unit
Check Code (Outdoor 7-segment display [B])
Displayed when SW01: 1, SW02: 1, SW03: 1
Check code
Outdoor 7-segment display
E06
E07
E08
E12
E15
E16
E19
E20
E23
E25
E26
E28
E31
F04
F05
F06
F07
F08
F12
F13
F15
F16
F23
F24
F31
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Displayed contents
LED
A
B
Auxiliary code
Number of indoor unit which received normally
——
Duplicated indoor addresses
01: Communication between indoor and outdoor
02: Communication between outdoor units
——
00: Capacity over 01~: No. of connected units
00: Header is nothing
02: Two or more header units
01: Other line outdoor connected
02: Other line indoor connected
——
——
Number of outdoor unit which received normally
Detected outdoor unit No.
IPDU quantity information
——
——
——
——
——
——
01: Compressor 1 side
02: Compressor 2 side
——
——
——
——
——
D600
D601 D602 D603 D604
A
B
Outdoor unit No.
(U1 to U4)
Check code display∗
Decrease of number of indoor units
Indoor/Outdoor communication circuit error
Duplication of indoor addresses
Automatic address start error
Indoor is nothing during automatic addressing
Capacity over / Number of connected indoor units
Number of header outdoor units error
Other line connected during automatic addressing
Sending error between outdoor units communication
Duplicated follower outdoor address setup
Decrease of connected outdoor units
Follower outdoor unit error
IPDU communication error
TD1 sensor error
TD2 sensor error
TE1 sensor error
TL sensor error
TO sensor error
TS1 sensor error
TH sensor error
Outdoor temp. sensor miswiring (TE, TL)
Outdoor pressure sensor miswiring (Pd, Ps)
Ps sensor error
Pd sensor error
Outdoor EEPROM error
23
∗ However, when there is an
auxiliary code, the check code
(for 3 seconds) and the
auxiliary code (for 1 second)
are alternately displayed.
Check code name
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