Alarm And Alert Codes - Carrier GEMINI 38APD025-100 Operating And Service Manual

A170 (Loss of Communication with the Compressor
Expansion Module) — This alarm indicates that there are
communications problems with the compressor expansion,
which is required for unit sizes 070 to 100. The alarm will auto-
matically reset.
A173 (Energy Management Module Communication Fail-
ure) — This alarm indicates that there are communications
problems with the energy management. All functions per-
formed by the EMM will stop, which can include demand lim-
it, reset and capacity input. The alarm will automatically reset.
T174 (4 to 20 mA Cooling Set point Input Failure) — This
alert indicates a problem has been detected with cooling set
point 4 to 20 mA input. The input value is either less than 2 mA
or greater than 22 mA.
T176 (4 to 20 mA Reset Input Failure) — This alert indi-
cates a problem has been detected with reset 4 to 20 mA input.
The input value is either less than 2 mA or greater than 22 mA.
The reset function will be disabled when this occurs.
T177 (4 to 20 mA Demand Limit Input Failure)
alert indicates a problem has been detected with demand limit
4 to 20 mA input. The input value is either less than 2 mA or
ALARM/ ALARM OR
ALERT CODE ALERT
T048 Alert
T049 Alert
T051, T052, T053 Alert
T055, T056, T057 Alert
A051, A052, A053 Alarm
A055, A056, A057 Alarm
A060 Alarm
A060 Alarm
A061 Alarm
A061 Alarm
T068 Alert
T069 Alert
T073 Alert
T074 Alert
T090 Alert
T091 Alert
T092 Alert
T093 Alert
T094 Alert
CCN — Carrier Comfort Network
CSB — Current Sensor Board
CXB — Compressor Expansion Module
DTT — Discharge Temperature Thermistor
EEPROM — Electrically Erasable Programmable
Read-Only Memory
EMM — Energy Management Module
— This
Table 26 — Alarm and Alert Codes
DESCRIPTION WHY WAS THIS ALARM GENERATED?
Circuit A Compressor
Availability Alert
Circuit B Compressor
Availability Alert
Circuit A
Respective current sensor board (CSB)
Compressor A1,A2,A3
feedback signal does not match relay state
Failure
Circuit B
Respective current sensor board (CSB)
Compressor B1,B2,B3
feedback signal does not match relay state
Failure
Circuit A Respective current sensor board (CSB)
Compressor A1,A2,A3 feedback signal is ON when the compressor
Failure
Circuit B Respective current sensor board (CSB)
Compressor B1,B2,B3 feedback signal is ON when the compressor
Failure
Supply Air Thermistor outside range of –40 to 245 F
Thermistor Failure
Supply Air Temperature
Temperature not updated during 3 minutes
Update not received
Return Air Thermistor outside range of –40 to 245 F
Thermistor Failure
Return Air Temperature
Temperature not updated during 3 minutes
Update not received
Circuit A Return Gas Thermistor is outside range of –40 to 245 F
Thermistor Failure
Circuit B Return Gas Thermistor is outside range of –40 to 245 F
Thermistor Failure
Outside Air Thermistor outside range of –40 to 245 F
Thermistor Failure
Space Temperature Thermistor outside range of –40 to 245 F
Thermistor Failure
Circuit A Discharge Pres- The pressure is outside the range of
sure Transducer Failure
Circuit B Discharge Pres- The pressure is outside the range of
sure Transducer Failure
Circuit A Suction Pressure The pressure is outside the range of
Transducer Failure
Circuit B Suction Pressure The pressure is outside the range of
Transducer Failure
Discharge Gas
Thermistor Failure
LEGEND
®
LWT — Leaving Fluid Temperature
MBB — Main Base Board
SCT — Saturated Condensing Temperature
SST — Saturated Suction Temperature
TSTAT — Thermostat
greater than 22 mA. The reset function will be disabled when
this occurs.
A200 (Fan Status Switch 1 Failure)
T201 (Fan Status Switch 1 Failure)
T202 (Fan Status Switch 2 Failure) — This alarm or alert in-
dicates the fan status input 1 or 2 is open when the unit is ON.
The unit will be in an alert condition until the fan status switch
is closed. The alarm or alert is an automatic reset when the fan
status switch closes. The A200 alarm is for single circuit units.
T303 (Condenser Coil Maintenance Due) — Coil Service
Countdown (C.L.DN) expired. Complete condenser coil clean-
ing and enter 'YES' for Coil Maintenance Done (C.L.MN)
item.
T500, T501, T502 (Current Sensor Board Failure — A xx
Circuit A)
T503, T504, T505 (Current Sensor Board Failure — B xx
Circuit B) — Alert codes 500, 501, 502, 503, 504, and 505 are
for compressors A1, A2, A3, B1, B2, and B3 respectively.
These alerts occur when the output of the current sensor (CS) is
a constant high value. These alerts reset automatically. If the
problem cannot be resolved, the CS board must be replaced.
Two compressors on circuit failed
Two compressors on circuit failed
should be off
should be off
(–40 to 118 C)
(–40 to 118 C)
(–40 to 118 C)
(–40 to 118 C)
(–40 to 118 C)
(–40 to 118 C)
0.0 to 667.0 psig
0.0 to 667.0 psig
0.0 to 420.0 psig
0.0 to 420.0 psig
Discharge thermistor (DTT) is
either open or shorted
64
ACTION TAKEN
BY CONTROL
Circuit shut down
Circuit shut down
Respective compressor shut
down in Circuit A.
Respective compressor shut
down in Circuit B.
Unit shut down
Unit shut down
Unit shut down
Unit shut down
Unit shut down
Unit shut down
Circuit shut down
Circuit shut down
Temperature reset disabled.
Unit runs under normal
control/set points.
Temperature reset disabled.
Unit runs under normal
control/set points.
Circuit A shut down
Circuit B shut down
Circuit A shut down
Circuit B shut down
Digital compressor shut down.
RESET
METHOD
Manual
Manual
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic