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Check code
Outdoor 7-segment display
Main
remote
controller
Check code Sub-code
AI-NET
central control
remote controller
Detected
position
Check code name Status Error detection condition Check item (position)
Temperature change of TK1
could not be detected after
compressor 1 started
operation.
• Check TK1 sensor coming-off.
• Check characteristics of TK1 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check operation error of SV3E valve.
• Check capillary clogging of oil-equation circuit and
operation error of stop valve.
• Check refrigerant stagnation in compressor.
• Check MG-SW or OCR.
Temperature change of TK2
could not be detected after
compressor 2 started
operation.
• Check TK2 sensor coming-off.
• Check characteristics of TK2 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillar
y
clo
gg
in
g
of oil equalization circuit and
check stop valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
Temperature change of TK3
could not be detected after
compressor started
operation.
• Check TK3 sensor coming-off.
• Check characteristics of TK3 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillar
y
clo
gg
in
g
of oil-equalization circuit and
check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
H16 H16
01: TK1 oil circuit system error
02: TK2 oil circuit system error
03: TK3 oil circuit system error
04: TK4 oil circuit system error
d7 I/F
Oil level detective circuit system error
MG-SW error
OCR operation
All stop
Temperature change of TK4
could not be detected after
compressor started
operation, or the difference
from other TK sensor
changed for a constant time
only within the specified
range.
• Check TK4 sensor coming-off.
• Check characteristics of TK4 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillar
y
clo
gg
in
g
of oil-equalization circuit and
check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
L03 —— 96 Indoor Duplicated indoor center units Correspondin
g
unit only stops.
There are multiple header
units in a group.
• Check indoor address.
• Check the change of remote controller connection
(Group/individual) after indoor address setup.
L04 L04 — 96 I/F Duplicated outdoor line address All stop
Line address setup is
duplicated against the
outdoor unit in different
refrigerant pipe system.
• Check line address.
L05 —— 96 I/F
Duplicated indoor units with priority
(Displayed on indoor unit with priority)
All stop
Indoor units with priorit
y
were
duplicated.
• Check display of indoor unit with priority.
MG-SW : Magnet Switch, OCR : Over-current Relay