69
Table 49 — Alarm Codes
LEGEND
PREFIX
CODE
SUFFIX
CODE
ALARM
NUMBER
ALARM DESCRIPTION
REASON FOR ALARM
ACTION TAKEN
BY CONTROL
RESET
TYPE
PROBABLE CAUSE
th
01
1
Cooler Entering Fluid
Thermistor
Temperature measured
by the controller is
outside of the range
of –40 F to 245 F
Unit be shut down or
not allowed to start
Automatic
Faulty Sensor,
wiring error or failed
main base board
02
2
Cooler Leaving Fluid
Thermistor
03
3
Circuit A Defrost Thermistor
None
Automatic
Configuration error
04
4
Circuit B Defrost Thermistor
06
5
Condenser Entering
Fluid Thermistor
07
6
Condenser Leaving
Fluid Thermistor
08
7
Reclaim Condenser
Entering Thermistor
09
8
Reclaim Condenser
Leaving Thermistor
11
10
Master/Slave Common Fluid
Thermistor
Dual chiller deacti-
vated. Master and
slave machines
operate in stand-
alone mode
Automatic
Faulty Sensor,
wiring error or failed
main base board
12
11
Circuit A Suction Gas
Thermistor
Circuit shut down or
not allowed to start
Automatic
Faulty Sensor,
wiring error, failed
EXV or CPM board
13
12
Circuit B Suction Gas
Thermistor
15
14
Circuit A Discharge Gas
Thermistor
16
15
Circuit B Discharge Gas
Thermistor
18
17
Circuit A Condenser Sub-
cooling Liquid Thermistor
Not supported
Automatic
Configuration error
19
18
Circuit B Condenser Sub-
cooling Liquid Thermistor
21
19
Space Temperature
Thermistor
Alarm tripped
Automatic
Faulty Sensor, wiring
error, failed EMM
board
23
20
Cooler heater feedback
thermistor
None
Automatic
Configuration error
24
21
Circuit A Economizer Gas
Thermistor
Circuit economizer
function disabled
Automatic
Faulty Sensor,
wiring error, failed
EXV board
25
22
Circuit B Economizer Gas
Thermistor
Pr
01
26
Circuit A Discharge
Transducer
Measured voltage is
0 vdc or SST > EWT and
EXV < 50% for 1 minute
Circuit shut down or
not allowed to start
Automatic
Faulty transducer,
wiring error, failed
main base board or
fan board
02
27
Circuit B Discharge
Transducer
04
29
Circuit A Suction Transducer
05
30
Circuit B Suction Transducer
07
32
Circuit A Reclaim Pump-
down Pressure Transducer
None
Automatic
Configuration error
08
33
Circuit B Reclaim Pump-
down Pressure Transducer
10
34
Circuit A Oil Pressure
Transducer
Circuit shut down or
not allowed to start
Automatic
Faulty transducer,
wiring error, failed
CPM board
11
35
Circuit B Oil Pressure
Transducer
13
37
Circuit A Economizer
Pressure Transducer
Measured voltage is
0 vdc
14
38
Circuit B Economizer
Pressure Transducer
CCN
—
Carrier Comfort Network
®
MLV
—
Minimum Load Valve
CPM
—
Compressor Protection Module
MOP —
Maximum Operating Pressure
EMM
—
Energy Management Module
MTA
—
Must Trip Amps
EWT
—
Entering Water Temperature
SST
—
Saturated Suction Temperature
EXV
—
Electronic Expansion Valve
UL
—
Underwriters Laboratories
HPS
—
High Pressure Switch