Toshiba Super MMU-AP0092H Service Manual page 100

Check code
Main Outdoor 7-segment display
remote
Check code Auxiliary code
controller
H14 H14 —
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 —
Detected
Check code name Status
position
I/F Compressor 2 case All stop
thermo operation
I/F Oil level detective All stop
circuit system error
MG-SW error
OCR operation
Indoor Duplicated indoor Corresponding
unit only stops.
center units
I/F Duplicated outdoor All stop
line address
Error detection condition
Compressor 2 case thermostat • Check compressor 2 case thermo circuit. (Connector, cable, P .C. board)
operated.
• Check full opening of service valve. (Gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV42 valve leak.
• Check miscabling/misinstallation of SV41 and SV42.
• Check valve opening of indoor PMV.
• Check 4-way valve error.
• Check refrigerant shortage.
Temperature change of TK1 could • Check TK1 sensor coming-off.
not be detected though compres-
• Check characteristics of TK1 sensor resistance value.
sor 1 started the operation.
• 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 • 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, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillary clogging 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 • Check TK3 sensor coming-off.
not be detected though compressor
• Check characteristics of TK3 sensor resistance value.
started the operation.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillary clogging of oil-equalization circuit and check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
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, and TK4 misconnection.
difference from other TK sensor
• Check SV3E 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.
• Check MG-SW or OCR.
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)
MG-SW : Magnet Switch,
OCR : Over-current Relay