Carrier ComfortLink 6 Series - Page 46

46
Table 32  Alarm and Alert Codes (cont)
ALARM/
ALERT CODE
ALARM OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM GENERATED?
ACTION TAKEN BY
CONTROL
RESET
METHOD
PROBABLE CAUSE
T120 Alert Circuit A Low
Saturated Suction
Temperature
SSTreads6°F(3.3°C)or
more below the brine freeze
point for 3 minutes or 28° F
below brine freeze point for
2 minutes.
Circuit A shut down Manual† Low refrigerant charge,
plugged strainer, faulty expan-
sion valve, or low water flow.
T121 Alert Circuit B Low
Saturated Suction
Temperature
SSTreads6°F(3.3°C)or
more below the brine freeze
point for 3 minutes or 28° F
below brine freeze point for
2 minutes.
Circuit B shut down Manual† Low refrigerant charge,
plugged strainer, faulty expan-
sion valve, or low water flow.
T122 Alert Circuit A High
Saturated Suction
Temperature
After first 90 seconds, SST
> 55 F (12.8 C) and EXV
< 1% for 5 minutes.
Circuit A shut down Manual Faulty expansion valve or
transducer.
T123 Alert Circuit B High
Saturated Suction
Temperature
After first 90 seconds, SST
> 55 F (12.8 C) and EXV
< 1% for 5 minutes.
Circuit B shut down Manual Faulty expansion valve or
transducer.
T124 Alert Circuit A Low Oil
Level/Flow
Level switch input open. Circuit A shut down
after 4th failure in
18 hours.
Manual Low oil level, failed switch,
wiring error, failed control
module.
T125 Alert Circuit B Low Oil
Level/Flow
Level switch input open. Circuit B shut down
after 4th failure in
18 hours.
Manual Low oil level, failed switch,
wiring error, failed control
module.
T126 Alert Circuit A High Dis-
charge Pressure
SCT > MCT_SP + 5° F
(2.8° C)
Circuit A shut down. Automatic** Faulty transducer/high pres-
sure switch, low/restricted
condenser air/water flow†
†
T127 Alert Circuit B High Dis-
charge Pressure
SCT > MCT_SP + 5° F
2.8° C)
Circuit B shut down. Automatic** Faulty transducer/high pres-
sure switch, low/restricted
condenser air/water flow†
†
A128 Alarm Circuit A Condenser
Freeze Protection
(alarm ignored for
brine chillers)
For water cooled chillers only,
if SCT < 34 F (1.1° C)
Chiller shut down.
Turns condenser pump
On if Chiller is Off.
Automatic Failed/bad discharge pres-
sure transducer, refrigerant
leak, configured for water-
cooled condenser.
A129 Alarm Circuit B Condenser
Freeze Protection
(alarm ignored for
brine chillers)
For water cooled chillers only,
if SCT < 34 F (1.1° C)
Chiller shut down.
Turns condenser pump
On if Chiller is Off.
Automatic Failed/bad discharge pres-
sure transducer, refrigerant
leak, configured for water-
cooled condenser.
T135 Alert Circuit A Failure to
Pump Out
With EXV closed, SST did not
drop 10° F (5.6° C) in 6 min-
utes, or SST is not 6° F
(3.3° C) less than Brine
Freeze,orSSTisnotless
than 10 F (–12 C).
None Manual Faulty transducer or EXV.
T136 Alert Circuit B Failure to
Pump Out
With EXV closed, SST did not
drop 10° F (5.6° C) in 6 min-
utes, or SST is not 6° F
(3.3° C) less than Brine
Freeze,orSSTisnotless
than 10 F (–12 C).
None Manual Faulty transducer or EXV
T137 Alert Circuit A Low Dis-
charge Superheat
Superheat < 5° F (2.8° C) for
10 minutes.
Circuit A shut down Manual Faulty thermistor, transducer,
EXV, or Economizer TXV.
Motor cooling solenoid stuck
open.
T138 Alert Circuit B Low Dis-
charge Superheat
Superheat < 5° F (2.8° C) for
10 minutes.
Circuit B shut down Manual Faulty thermistor, transducer,
EXV, or Economizer TXV.
Motor cooling solenoid stuck
open.
T140 Alert Compressor A1 –
High Oil Filter Pres-
sure Drop
Oil filter pressure drop
(FD.A1) exceeds 25 psig
172 kPa) for water-cooled
units or 30 psig (207 kPa) for
air-cooled and split system
units.
None Manual Filter change needed to pre-
vent machine from shutting
down.
T141 Alert Compressor A2 –
High Oil Filter Pres-
sure Drop
Oil filter pressure drop
(FD.A2) exceeds 25 psig
(172 kPa) for water-cooled
units or 30 psig (207 kPa) for
air-cooled and split system
units.
None Manual Filter change needed to pre-
vent machine from shutting
down.