PREFIX
CODE
P
SUFFIX
CODE
4O
41
42
43
73
74
78
79
8O
81
82
83
87
88
89
9O
91
ALARM
NUMBER
93
94
95
96
97
98
99
100
101
1O2
1O3
1O4
1O5
1O6
1O7
1O8
1O9
Table 39 -- Alarm Codes (cont)
ALARM DESCRIPTION
Circuit A -- Repeated low
suction temp overrides
Circuit B -- Repeated low
suction temp overrides
Circuit C -- Repeated low
suction temp overrides
Low entering water tempera-
ture in heating
Condenser pump #1 default
Condenser pump #2 default
Circuit A High Discharge
Temperature
Circuit B High Discharge
Temperature
Circuit C High Discharge
Temperature
Circuit A Low Economizer
Pressure
Circuit B Low Economizer
Pressure
Circuit C Low Economizer
Pressure
Circuit A Slide Valve Control
Unverifiable
Circuit B Slide Valve Control
Unverifiable
Circuit C Slide Valve Control
Unverifiable
Cooler flow switch set point
configuration failure
Cooler flow switch failure
REASON FOR ALARM
Multiple capacity
overrides due to low satu-
rated suction temperature
ACTION TAKEN
BY CONTROL
Circuit shut down
RESET
TYPE
Automatic
PROBABLE CAUSE
Inaccurate
transducer, faulty EXV,
low refrigerant charge,
plugged or restricted
liquid line filter drier.
Not supported
-- Configuration error
None
Circuit shut down
Circuit shut down
Discharge gas tempera-
ture is higher than 212 F
for more than 90 seconds
Alarm tripped
Manual
Manual
Manual
Manual
The economizer pressure
is below the suction pres-
sure more than 14.5 psi
for more than 10seconds
If 100% load current is
less than 1.3 times of 30%
load current, or 30% load
current is greater than
0.78 times of expected
100% load current
Faulty transducer/high
pressure switch, low/
restricted condenser
flow
Faulty transducer,
faulty main base board,
faulty wiring, closed
suction service valve,
faulty EXV
CPM board detects cur-
rent unbalance greater
than 65% for more than
1 second
Slide valve stuck, inac-
curate initial current
reading
-- None Manual Configuration error
Flow switch open Unit shut down Manual if unit Faulty flow switch, low
is running, cooler flow, faulty
automatic wiring, faulty cooler
otherwise pump, faulty main base
board
Sr nn 110 Service maintenance alert Field programmed None Manual Maintenance required
Number # nn elapsed time has expired
for maintenance time
A1, B1, Cl 01 111-01, Compressor Motor tempera- Compressor temperature Circuit shut down Manual Motor cooling solenoid
112-01, ture too high higher than 232 F for or economizer
113-01 more than 90 seconds EXV failure, faulty
CPM board, low
refrigerant charge
02 111-02, Compressor Motor tempera- Compressor temperature Circuit shut down Manual Faulty thermistor, faulty
112-02, ture out of range reading out of the range of wiring, faulty CPM
113-02 -40 F to 245 F board
03 111-03, Compressor High pressure HPS input on CPM board Circuit shut down Manual Loss of condenser air
112-03, switch protection open flow, operation beyond
113-03 compressor envelope,
faulty high pressure
switch, faulty wiring,
faulty CPM board
04 111-04, Compressor Over current CPM board detects high Circuit shut down Manual Operating beyond
112-04, motor current compared chiller envelope, incor-
113-04 with MTA setting rect configuration
05 111-05, Compressor Locked rotor CPM board detects locked Circuit shut down Manual Compressor motor fail-
112-05, rotor current compared ure, unloader slide
113-05 with MTA setting valve failure, compres-
sor mechanical failure
Circuit shut down Manual Blown fuse, wiring
error, loose terminals
06 111-06,
112-06,
113-06
07 111-07,
112-07,
113-07
08 111-08,
112-08,
113-08
09 111-09,
112-09,
113-09
Compressor Phase loss L1
Compressor Phase loss L2
Compressor Phase loss L3
Compressor Low current CPM detects motor cur- Circuit shut down Manual Power supply discon-
alarm rent less than a certain nected, blown fuse,
percentage of the MTA wiring error, contact
setting deenergized, faulty
current toroid.
-- Must Trip Amps
-- Outdoor Air Temperature
-- Saturated Suction Temperature
-- Underwriters' Laboratories
LEGEND
CON i Carrier Comfort Network® MTA
CPM -- Compressor Protection Module OAT
EMM -- Energy Management Module SST
EXV -- Electronic Expansion Valve UL
MOP -- Maximum Operating Pressure
*NRCP2 is the Energy Management Board.
71
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