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9
Troubleshooting
In addition to the CODE No. on the remote control of an indoor unit, you can diagnose trouble of an outdoor unit by
checking the 7-segment display on the interface P.C. board.
Use the function for various checks.
Set every dip switch to OFF after checking.
7-Segment display and check code
Rotary switch setting
value
Indication
SW01
SW02
SW03
1
1
1
Outdoor unit check code
* If a check code has an auxiliary code, the display indicates the check code for three seconds and the auxiliary code
for one second alternately.
Check code (indicated on the 7-segment display on the outdoor unit)
Indicated when SW01 = [1], SW02 = [1], and SW03 = [1].
Check code
Indication on 7-segment display on the outdoor unit
Auxiliary code
E06
Number of indoor units which received normally
E07
—
E08
Duplicated indoor addresses
E15
—
E16
00: Capacity over 01 or more: No. of connected units
01: Other line outdoor connected
E20
02: Other line indoor connected
E31
IPDU quantity information*1
F04
—
F06
—
F07
—
F08
—
F12
—
F13
—
F15
—
F16
—
F23
—
F24
—
F31
—
H01
—
EN-51
LED
D600 D601 D602 D603 D604
A
B
Outdoor unit number
A
(U1)
B
Check code display*
Check code name
Decrease of number of indoor units
Indoor / Outdoor communication circuit trouble
Duplication of indoor addresses
No indoor unit during automatic addressing
Number of connected capacity over / indoor units
Other line connected during automatic addressing
IPDU communication trouble
TD sensor trouble
TE sensor trouble
TL sensor trouble
TO sensor trouble
TS sensor trouble
TH sensor (Board installed) trouble
Outdoor temp. sensor miswiring (TE, TL)
Outdoor pressure sensor miswiring (Pd, Ps)
Ps sensor trouble
Pd sensor trouble
Outdoor EEPROM trouble
Compressor breakdown
Check code
Indication on 7-segment display on the outdoor unit
Auxiliary code
H02
—
H03
—
H06
—
L04
—
L06
Number of indoor units with priority
L08
—
L10
—
L29
IPDU quantity information *1
L30
Detected indoor unit address
P03
—
P04
—
00
P05
*E (*: Fan motor number)
—
P07
—
P10
Detected indoor unit address
P13
—
P15
01: TS condition
02: TD condition
P19
—
P20
—
*0: Elemental device short
*1: Position detective circuit trouble
*2: Input current sensor trouble
*3: Fan motor lock trouble
*4: Motor current trouble
P22
*5: Synchronize, step out trouble
*C: Sensor temperature trouble (No TH sensor)
*D: Sensor short, free trouble (No TH sensor)
(*: Fan motor number)
P26
—
P29
—
*1 IPDU number information
01: Compressor
02: Fan 1
03: Compressor and Fan 1
04: Fan 2
05: Compressor and Fan 2
07: Compressor, Fan 1 and Fan 2
09: Compressor
0A: Fan 1
0B: Compressor, Fan 1
0C: Fan 2
0D: Compressor, Fan 2
0E: Fan 1, Fan 2
0F: Compressor, Fan 1, Fan 2
– 26 –
Check code name
Compressor trouble (Lock)
Current detective circuit system trouble
Low-pressure protective operation
Outdoor system address duplicated
Duplication of indoor units with priority
Indoor group / Address unset
Outdoor capacity unset
IPDU quantity trouble
External interlock of indoor unit
Discharge temp TD trouble
High-pressure switch trouble
Phase missing detection
Fan motor Vdc trouble
Compressor Vdc trouble
Heat sink overheat trouble
Indoor overflow trouble
Outdoor liquid back detection trouble
Gas leak detection
4-way valve operation trouble
High-pressure protective operation
Outdoor fan IPDU trouble
G-TR short protection trouble
Compressor position detective circuit system trouble
06: Fan 1 and Fan 2
EN-52
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