Operating instructions

91
Table 59 — Alarm Codes (cont)
LEGEND
PREFIX
CODE
SUFFIX
CODE
ALARM
NUMBER
ALARM DESCRIPTION REASON FOR ALARM
ACTION TAKEN
BY CONTROL
RESET
TYPE
PROBABLE CAUSE
Pr 10 32 Circuit A Oil Pressure
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 CPM
board
11 33 Circuit B Oil Pressure
Transducer
12 34 Circuit C Oil Pressure
Transducer
13 35 Circuit A Economizer
Pressure Transducer
14 36 Circuit B Economizer
Pressure Transducer
15 37 Circuit C Economizer
Pressure Transducer
Measured voltage is
0 vdc
Circuit shut down or
not allowed to start
Automatic Faulty transducer,
wiring error, failed CPM
board
Co A1 38 Loss of communication with
Compressor Board A
No communication
with CPM board
Affected
compressor shut
down
Automatic Wrong CPM address,
wrong unit configura-
tion, wiring error, power
loss, failed
CPM board
B1 39 Loss of communication with
Compressor Board B
C1 40 Loss of communication with
Compressor Board C
E1 41 Loss of communication with
EXV Board A
No communication with
EXV board
Affected
compressor
shut down
Automatic Wrong EXV board
address, wrong unit
configuration, wiring
error, power loss,
failed EXV board
E2 42 Loss of communication with
EXV Board B
E3 43 Loss of communication with
EXV Board C
F1 44 Loss of communication with
Fan Board 1
No communication with
fan board
Circuit A/B shut
down or not allowed
to start (080-120
ton), Circuit A shut
down or not allowed
to start
(130-500 ton)
Automatic Wrong board address,
wrong unit configura-
tion, wiring error, loss
of power, failed board
F2 45 Loss of communication with
Fan Board 2
No communication with
fan board
Circuit B shut down
or not allowed to
start (130-500 ton)
Automatic Wrong board address,
wrong unit configura-
tion, wiring error, loss
of power, failed board
F3 46 Loss of communication with
Fan Board 3
No communication with
fan board
Circuit C shut down
or not allowed to
start (400-500 ton)
Automatic Wrong board address,
wrong unit configura-
tion, wiring error, loss
of power, failed board
01 47 Loss of communication with
Free Cooling Board 1
No communication with
free cooling board
None Automatic Configuration error
02 48 Loss of communication with
Free Cooling Board 2
03 49 Loss of communication with
Energy Management Board
No communication with
EMM board
Disable or not allow
EMM functions
3 step and 4-20 mA
and space tempera-
ture reset, occu-
pancy override and
ice build)
Automatic Wrong board
address, wrong unit
configuration, wiring
error, power loss to
module, failed module
04 50 Loss of communication with
Heat Reclaim Board
No communication
with Free Cooling Board
None Automatic Configuration error
05 51 Loss of communication with
AUX Board 6
No communication
with HGBP/PUMP Board
Unit shut down or
not allowed to start
Automatic
Wrong board
address, wrong unit
configuration, wiring
error, power loss to
module, failed module
P 01 52 Cooler Freeze Protection Entering or leaving therm-
istor sensed a tempera-
ture at or below freeze
point
Unit shut down or
not allowed to start
Automatic, first
occurrence in
24 hours;
manual if
multiple alarms
within 24 hours
Faulty thermistor, faulty
wiring, low water flow,
low loop volume, fouled
cooler, or freeze
conditions
02 53 Condenser Freeze Protection
Circuit A
— None Automatic Configuration error
03 54 Condenser Freeze Protection
Circuit B
04 55 Condenser Freeze Protection
Circuit C
CCN — Carrier Comfort Network® HPS — High Pressure Switch
CPM — Compressor Protection Module LWT — Leaving Water Temperature
DX — Direct Expansion MOP — Maximum Operating Pressure
EMM — Energy Management Module MTA — Must Trip Amps
EWT — Entering Water Temperature OAT — Outdoor Air Temperature
EXV — Electronic Expansion Valve SST — Saturated Suction Temperature
HGBP — Hot Gas Bypass UL — Underwriters Laboratories