Operating instructions

92
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
P 05 56 Circuit A Low Suction
Temperature
Low saturated suction tem-
peratures detected for a
period of time
Circuit shut down Automatic, first
occurrence in 24
hours;
manual if
multiple alarms
within 24 hours
Faulty thermistor, faulty wir-
ing, low water flow, low loop
volume, fouled cooler, or
freeze conditions.
Closed suction valve, DX
units.
06 57 Circuit B Low Suction
Temperature
07 58 Circuit C Low Suction
Temperature
08 59 Circuit A High Suction
Superheat
EXV>98%,
suction superheat > 30 F
(–1 C), and SST<MOP for
more than 5 minutes
Circuit shut down Manual Faulty transducer, faulty wir-
ing, faulty thermistor, faulty
EXV, low refrigerant charge,
plugged or restricted liquid
line
09 60 Circuit B High Suction
Superheat
10 61 Circuit C High Suction
Superheat
11 62 Circuit A Low Suction
Superheat
EXV<5% and either the suc-
tion superheat is less than
the set point by at least 5 F
(–15 C) or the suction tem-
perature is greater than
MOP set point for more than
5 minutes
Circuit shut down Manual Faulty transducer, faulty wir-
ing, faulty thermistor, faulty
EXV, or incorrect
configuration
12 63 Circuit B Low Suction
Superheat
13 64 Circuit C Low Suction
Superheat
14 65 Interlock Failure Lockout Switch Closed Unit shut down or
not allowed to
start
Automatic Lockout Switch Closed
on EMM board
28 66 Electrical Box Thermo-
stat Failure/Reverse
Rotation
External pump interlock
open
Unit shut down or
not allowed to
start
Automatic External pump off. Faulty
jumper wiring when channel
not used
29 67 Loss of communication
with System Manager
Loss of communication with
an external control device
for more than
2 minutes
Unit change to
stand-alone
operation
Automatic Faulty communication wir-
ing, no power supply to the
external controller
30 68 Master/Slave communi-
cation Failure
Communication between the
master and slave machines
lost
Unit change to
stand-alone
operation
Automatic Faulty communication wir-
ing, no power or control
power to the main base
board of either module
67 69 Circuit A Low Oil
Pressure
Oil pressure and suction
pressure differential is less
than the set point
Circuit shut down Automatic, first
occurrence in 24
hours;
manual if
multiple alarms
within 24 hours
Plugged oil filter, faulty oil
transducer, oil check valve
stuck, plugged oil strainer
68 70 Circuit B Low Oil
Pressure
69 71 Circuit C Low Oil
Pressure
70 72 Circuit A Max Oil Filter
Differential Pressure
Difference between dis-
charge pressure and oil
pressure is greater than
50 psi for more than
30 seconds
Circuit shut down Manual Plugged oil filter, closed oil
valve, bad oil solenoid, oil
check valve stuck, faulty oil
pressure transducer
71 73 Circuit B Max Oil Filter
Differential Pressure
72 74 Circuit C Max Oil Filter
Differential Pressure
84 75 Circuit A High Oil Filter
Drop Pressure
Difference between dis-
charge pressure and oil
pressure is greater than
30 psi for more than
5 minutes
Alert generated Manual Plugged oil filter
85 76 Circuit B High Oil Filter
Drop Pressure
86 77 Circuit C High Oil Filter
Drop Pressure
75 78 Circuit A Low Oil Level Oil level switch open Circuit shut down
or not allowed to
start
Automatic, first
occurrence in 24
hours; manual if
multiple alarms
within 24 hours
Low oil level, faulty switch,
wiring error, failed CPM
board
76 79 Circuit B Low Oil Level
77 80 Circuit C Low Oil Level
MC nn 81 Master chiller configura-
tion error Number 01 to
nn
Wrong or incompatible con-
figuration data
Unit not allowed to
start in Master-
slave control
Automatic Configuration error
FC n0 82 No factory configuration No Configuration Unit not allowed to
start
Automatic Configuration error
nn 83 Illegal factory configura-
tion Number 01 to 04
Wrong or incompatible con-
figuration data
Unit not allowed to
start
Automatic Configuration error
(see Table 61)
P 31 84 Unit is in CCN emer-
gency stop
Emergency stop command
has been received
Unit shut down or
not allowed to
start
Automatic Carrier Comfort
Network
®
Emergency Stop
command received
32 85 Cooler pump #1 fault Pump interlock status does
not match pump
status
Unit shuts down, if
available, another
pump will start
Manual Faulty contacts, wiring error
or low control voltage. Con-
figuration error.
33 86 Cooler pump #2 fault
15 87 Condenser Flow Switch
Failure
— None Manual Configuration error
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