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Table 27 — Alarm and Alert Codes
ALARM/
ALERT
CODE
ALARM
OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
PROBABLE
CAUSE
51
Alert
Circuit A, Compressor 1
Failure
Compressor feedback
signal does not match
relay state
Circuit A shut down.
Manual
High-pressure or loss-of-
charge switch open, faulty
control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
52
Alert
Circuit A, Compressor 2
Failure
Compressor feedback
signal does not match
relay state
Circuit A shut down.
Circuit restarted in 1
minute. Compressor
A2 not used until alarm
is reset.
Manual
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
53
Alert
Circuit A, Compressor 3
Failure
Compressor feedback
signal does not match
relay state
Circuit A shut down.
Circuit restarted in 1
minute. Compressor
A3 not used until alarm
is reset.
Manual
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
54
Alert
Circuit A, Compressor 4
Failure
Compressor feedback
signal does not match
relay state
Circuit A shut down.
Circuit restarted in 1
minute. Compressor
A4 not used until alarm
is reset.
Manual
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
55
Alert
Circuit B, Compressor 1
Failure
Compressor feedback
signal does not match
relay state
Circuit B shut down.
Manual
High-pressure or loss-of-
charge switch open, faulty
control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
56
Alert
Circuit B, Compressor 2
Failure
Compressor feedback
signal does not match
relay state
Circuit B shut down.
Circuit restarted in 1
minute. Compressor
B2 not used until alarm
is reset.
Manual
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
57
Alert
Circuit B, Compressor 3
Failure
Compressor feedback
signal does not match
relay state
Circuit B shut down.
Circuit restarted in 1
minute. Compressor
B3 not used until alarm
is reset.
Manual
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser
air, liquid valve closed, op-
eration beyond capability.
60
Alarm
Cooler Leaving Fluid
Thermistor Failure (T1)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Chiller shutdown after
pumpdown complete.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
61
Alarm
Cooler Entering Fluid
Thermistor Failure (T2)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Chiller shutdown after
pumpdown complete.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
64
Alert
Circuit A Saturated Con-
densing Thermistor Fail-
ure (T3)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Circuit A shutdown
after pumpdown com-
plete. (EXV only)
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
65
Alert
Circuit B Saturated Con-
densing Thermistor Fail-
ure (T4)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Circuit B shutdown
after pumpdown
complete.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
66
Alert
Circuit A Saturated Suc-
tion Thermistor Failure
(T5)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Circuit A shutdown
after pumpdown com-
plete. (EXV only)
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
67
Alert
Circuit B Saturated Suc-
tion Thermistor Failure
(T6)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Circuit B shutdown
after pumpdown
complete.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
68
Alert
Compressor A1 Suction
Gas Thermistor Failure
(T7)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Circuit A shutdown
after pumpdown com-
plete. (EXV only).
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
69
Alert
Compressor B1 Suction
Gas Thermistor Failure
(T8)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Circuit B shutdown
after pumpdown com-
plete. (EXV only).
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
73
Alert
Outside Air Thermistor
Failure (T9)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Temperature reset dis-
abled. Chiller runs un-
der normal control/set
points.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
74
Alert
Space Temperature
Thermistor Failure (T10)
Thermistor outside
range of −40 to 245 F
(−40 to 118 C)
Temperature reset dis-
abled. Chiller runs un-
der normal control/set
points.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
77
Alert
Circuit A Saturated
Suction Temperature
exceeds Cooler Leaving
Fluid Temperature
Saturated suction is
greater than leaving
fluid temperature for
more than 5 minutes
Circuit A shutdown
after pumpdown
complete.
Automatic
Faulty expansion valve or
EXV board, faulty cooler
suction thermistor (T5) or
leaving fluid thermistor (T1).
78
Alert
Circuit B Saturated
Suction Temperature
exceeds Cooler Leaving
Fluid Temperature
Saturated suction is
greater than leaving
fluid temperature for
more than 5 minutes
Circuit B shutdown
after pumpdown
complete
Automatic
Faulty expansion valve or
EXV board, faulty cooler
suction thermistor (T6) or
leaving fluid thermistor (T1).
48
Summary of Contents for 30GTN
Page 6: ...Fig 1 Typical Control Box 080 110 and Associated Modular Units Shown 6 ...
Page 7: ...Fig 2 24 V Control Schematic Unit Sizes 040 070 7 ...
Page 8: ...Fig 3 24 V Control Schematic Unit Sizes 080 110 230B 315B 8 ...
Page 9: ...Fig 4 24 V Control Schematic Unit Sizes 130 210 230A 315A 330A B 420A B 9 ...
Page 75: ......