79
Check code
Wired
remote
controller
H15
H16
H25
L03
L04
Outdoor 7-segment display
Check code
Auxiliary code
H15
—
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
05: TK5 oil circuit system error
H25
—
—
—
L04
—
Detected
position
I/F
I/F
I/F
Indoor
I/F
Check code name
Outdoor unit discharge
temp. sensor (TD2)
miswiring
Oil level detective
circuit system error
Outdoor unit discharge
temp. sensor (TD3)
miswiring
Duplicated indoor
center units
Duplicated outdoor
line address
Status
All stop
All stop
All stop
Corresponding
unit only stops.
All stop
Error detection condition
While compressor 2 is operating,
the discharge temp. (TD2) does
not rise up.
Temperature change of TK1 could
not be detected though
compressor 1 started the
operation.
Temperature change of TK2 could
not be detected though compressor
2 started the operation.
Temperature change of TK3 could
not be detected though compressor
started the operation.
Temperature change of TK4 could
not be detected though compressor
started the operation, or the
difference from other TK sensor
changed for a constant time only
within the specified range.
Temperature change of TK5 could
not be detected though compres-
sor started the operation, or the
difference from other TK sensor
changed for a constant time only
within the specified range.
While compressor 2 is operating,
the discharge temp. (TD3) does
not rise up.
There are multiple center units in a
group.
Line address setup is duplicated
against the outdoor unit in different
refrigerant pipe system.
Check item (position)
• Check mounting of TD2 sensor.
• Check connection and wiring of TD2 sensor connector.
• Check characteristics of TD2 sensor resistance value.
• Check outdoor unit P.C. board (I/F) error.
• Check TK1 sensor coming-off.
• Check characteristics of TK1 sensor resistance value.
• Check TK1, TK2, TK3, TK4 and TK5 misconnection.
• Check operation error of SV3E, SV3F valve.
• Check capillary clogging of oil-equation circuit and operation error of stop valve.
• Check refrigerant stagnation in compressor.
• Check TK2 sensor coming-off.
• Check characteristics of TK2 sensor resistance value.
• Check TK1, TK2, TK3, TK4 and TK5 misconnection.
• Check SV3E, SV3F valve operation.
• Check capillary clogging of oil equalization circuit and check stop valve operation.
• Check refrigerant stagnation in compressor shell.
• Check TK3 sensor coming-off.
• Check characteristics of TK3 sensor resistance value.
• Check TK1, TK2, TK3, TK4 and TK5 misconnection.
• Check SV3E, SV3F valve operation.
• Check capillary clogging of oil-equalization circuit and check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check TK4 sensor coming-off.
• Check characteristics of TK4 sensor resistance value.
• Check TK1, TK2, TK3, TK4 and TK5 misconnection.
• Check SV3E, SV3F valve operation.
• Check capillary clogging of oil-equalization circuit and check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check TK5 sensor coming-off.
• Check characteristics of TK5 sensor resistance value.
• Check TK1, TK2, TK3, TK4 and TK5 misconnection.
• Check SV3E valve operation error.
• Check capillary clogging of oil-equalization circuit and check valve operation error.
• Check refrigerant stagnation in compressor.
• Check mounting of TD3 sensor.
• Check connection and wiring of TD3 sensor connector.
• Check characteristics of TD3 sensor resistance value.
• Check outdoor unit P.C. board (I/F) error.
• Check indoor address.
• Check the change of remote controller connection
(Group/individual) after indoor address setup.
• Check line address.
