Carrier MMY-MAP0724FT9UL Service Manual page 149

Check code
Main Outdoor 7-segment display
remote
Check Sub-code
controller
code
01: TS condition
02: TD condition
P15 P15
P17 P17 —
Location
of
Description
detection
I/F Gas
leakdetection
(TS1 condition)
I/F Gas leak
detection
(TD condition)
I/F Discharge
temperature TD2
error
Error detection
System status
condition(s)
All stop Protective shutdown due to
sustained suction
temperature at or above
judgment criterion
for at least 10 minutes is
repeated four times or more.
<TS error judgment criterion>
In cooling operation: 140˚F (60˚C)
In heating operation: 104˚F (40˚C)
All stop Protective shutdown due to
sustained discharge
temperature (TD1, TD2 or TD3)
at or above 226˚F (108˚C) for at
least 10 minutes is repeated
four times or more.
All stop Discharge temperature (TD2)
exceeds 239˚F (115˚C).
– 149 –
Check items (locations)
• Check for insufficiency in
refrigerant quantity.
• Check outdoor service valves
(discharge gas side, suction
gas side, liquid side) to
confirm full opening.
• Check PMVs (PMV1, 2, 4) for
clogging.
• Check resistance
characteristics of TS1 sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for leakage
• Check SV5 circuit leakage.
• Check mispiping of discharge
gas/suction gas main pipes.
• Check Cool/Heat FS unit.
Check SVD valve, SVS valve
leakage.
(Check SVDD valve, SVSS
valve leakage.)
Connecting piping to FS unit
Mispiping of (discharge gas/
suction gas)
• Check for insufficiency in
refrigerant quantity.
• Check PMVs (PMV 1, 2, 4) for
clogging.
• Check resistance
characteristics of TD1, TD2
and TD3 sensors.
• Check indoor filter for
clogging.
• Check piping for clogging.
• Check SV4 circuit (for leakage
or coil installation error).
• Check mispiping of discharge
gas/suction gas main pipes.
• Check Cool/Heat FS unit.
Check SVD valve, SVS valve
leakage.
(Check SVDD valve, SVSS
valve leakage.)
Connecting piping to FS unit
Mispiping of (discharge gas/
suction gas)
Check wiring and connection
of connectors between FS
unit and indoor unit.
Check miswiring of SVS/SVD
valves.
• Check outdoor service valves
(discharge gas side, suction
gas side, liquid side) to
confirm full opening.
• Check outdoor PMVs
(PMV1, 2, 4) for clogging.
• Check resistance
characteristics of TD2 sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for leakage.
• Check SV4 circuit (for wiring
or installation error involving
SV41, SV42 and SV43).
• Check SV5 valve circuit
leakage.
• Check SV6 circuit (Clogging,
valve operation error)
• Check mispiping of discharge
gas/suction gas main pipes.
• Check Cool/Heat FS unit.
Check SVD valve, SVS valve
leakage.
(Check SVDD valve, SVSS
valve leakage.)
Connecting piping to FS unit
Mispiping of (discharge gas/
suction gas)
Check wiring between FS unit
and indoor unit, connection of
connectors
Check miswiring of SVS/SVD
valve.