Toshiba MMD-AP0071SH-C Service Manual page 75

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