Toshiba MMK-AP0074MH-E Service Manual page 61

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