Carrier Ecologic Series 3 Controls, Start-Up, Operation, Service, And Troubleshooting page 48

ALARM/ALERT ALARM OR
CODE ALERT
31 Alert
32 Alarm
34 Alert
35 Alert
36 Alarm
37 Alert
38 Alert
40 Alert
41 Alert
42 Alert
43 Alert
44 Alarm
45 Alarm
46 Alarm
Table 36 — Alarm and Alert Codes (cont)
WHY WAS THIS
DESCRIPTION
ALARM GENERATED?
Circuit B Economizer Calibration offset more
Transducer Failure than 6 PSIG (41 kPa) or
Voltage ratio (volts read/
ref. voltage) more than
99.9% or less than 0.5%
Transducer Supply Out- Reference voltage mea-
side 4.5 to 5.5 Volts sured at PSIO-1, J7-
34,35 less than 4.5 V or
greater than 5.5 V.
4-20 mA Reset Input Out If configured and input
of Range signal to PSIO-2,
J7-19,20(HX),
J7-22,23(GX) less than
2 mA or greater than
20mA
4-20 mA Demand Limit If configured and input
Input Out of Range signal to PSIO-2,
J7-22,23(HX),
J7-13,14(GX) less than
2 mA or greater than
20mA
Loss of Communication PSIO-1 has lost commu-
with "Hardware Point" nication with one of the
points in Table 37.
Circuit A Low SST reads 6 F (3.3 C) or
Saturated Suction more below the brine
Temperature freeze point for 3 min-
utes. For brines, SST
may also be 14 F (7.8 C)
or more below the lowest
cooling set point.
Circuit B Low SST reads 6 F (3.3 C) or
Saturated Suction more below the brine
Temperature freeze point for 3 min-
utes. For brines, SST
may also be 14 F (7.8 C)
or more below the lowest
cooling set point.
Compressor A1 Low Oil See Note 1.
Pressure
Compressor A2 Low Oil See Note 1.
Pressure
Compressor B1 Low Oil See Note 1.
Pressure
Compressor B2 Low Oil See Note 1.
Pressure
Circuit A Condenser For W/C chillers only, if
Freeze Protection (alarm SCT < 34 F (1.1 C)
ignored for brine chillers)
Circuit B Condenser For W/C chillers only, if
Freeze Protection (alarm SCT < 34 F (1.1 C)
ignored for brine chillers)
Cooler Freeze Cooler EWT or LWT less
Protection than freeze point. Freeze
point is 34 F (1.1 C) for
water, cooling set point
minus 8 F (4.4 C) for
brines.
ACTION TAKEN
BY CONTROL
Circuit B shut down
Chiller shut down
Reset function disabled.
Normal set point used
Demand limit ignored.
Runs under normal con-
trol based on 100%
demand limit.
See Table 37.
Circuit A shut down
Circuit B shut down
Comp A1 shut down
Comp A2 shut down
Comp B1 shut down
Comp B2 shut down
Chiller shut down. Turn
Cond. pump On if Chiller
is Off
Chiller shut down. Turn
Cond. pump On if Chiller
is Off
Chiller shut down.
Leave Cooler pump on.
Turn Cooler pump On if
Chiller is Off.
48
PROBABLE
RESET METHOD
CAUSE
Automatic Transducer failure, power
supply failure, or wiring
damage/error.
Automatic Power supply failure or
wiring error. Low trans-
former voltage.
Automatic Faulty signal generator,
wiring error, 500 ohm
resistor missing or not
properly installed.
Automatic Faulty signal generator,
wiring error, 500 ohm
resistor missing or not
properly installed.
Automatic Failed module, wiring
error, failed transformer,
loose connection plug,
wrong address
Manual Low refrigerant charge,
plugged strainer, faulty
expansion valve. Low
water flow.
Manual Low refrigerant charge,
plugged strainer, faulty
expansion valve. Low
water flow.
Manual Low Water Temperature,
low refrigerant charge,
plugged oil filter, closed
oil valve, bad oil solenoid,
compressor oil check
valve stuck, oil line check
valve stuck, plugged oil
strainer
Manual Low Water Temperature,
low refrigerant charge,
plugged oil filter, closed
oil valve, bad oil solenoid,
compressor oil check
valve stuck, oil line check
valve stuck, plugged oil
strainer
Manual Low Water Temperature,
low refrigerant charge,
plugged oil filter, closed
oil valve, bad oil solenoid,
compressor oil check
valve stuck, oil line check
valve stuck, plugged oil
strainer
Manual Low Water Temperature,
low refrigerant charge,
plugged oil filter, closed oil
valve, bad oil solenoid,
compressor oil check
valve stuck, oil line check
valve stuck, plugged oil
strainer
Automatic Failed/bad discharge
pressure transducer,
refrigerant leak,
configured for water-
cooled condenser
Automatic Failed/bad discharge
pressure transducer,
refrigerant leak,
configured for water-
cooled condenser
Automatic** Faulty thermistor, low
water flow