Carrier AQUASNAP AIR COOLED CHILLERS WITH COMFORTLINK CONTROLS 30RAP010-060 Operation And Service Manual page 70

ALARM/ ALARM
ALERT OR DESCRIPTION
CODE ALERT
Flow Lost While Pump 2
T197 Alert
Running
Cooler Pump 1 Aux
T198 Alert Contacts Closed While
Pump Off
Cooler Pump 2 Aux
T199 Alert Contacts Closed While
Pump Off
Cooler Flow/Interlock
T200 Alert Contacts Failed to Close
at Start-Up
Cooler Flow/Interlock
Contacts Opened
A201 Alarm
During Normal
Operation
Cooler Pump Interlock
A202 Alarm Closed When Pump is
Off
Loss of Communication
T203 Alert
with Slave Chiller
Loss of Communication
T204 Alert
with Master Chiller
Master and Slave Chiller
T205 Alert
with Same Address
High Leaving Chilled
T206 Alert
Water Temperature
Cooler Freeze
A207 Alarm
Protection
EWT or LWT
A208 Alarm
Thermistor failure
Cooler Pump 1
T300 Alert Scheduled
Maintenance Due
Cooler Pump 2
T301 Alert Scheduled
Maintenance Due
Table 42 — Alarm and Alert Codes (cont)
WHY WAS THIS
ALARM
GENERATED?
Cooler flow switch contacts
open for 3 seconds after
initially made
Pump 1 Auxiliary Contacts
closed for 26 seconds
when pump state is off
Pump 2 Auxiliary Contacts
closed for 26 seconds
when pump state is off
Cooler flow switch contacts
failed to close within
1 minute (if cooler pump
control is enabled) or
within 5 minutes (if cooler
pump control is not
enabled) after start-up
Flow switch opens for at
least 3 seconds after
being initially closed
If configured for cooler
pump control and flow
switch input is closed for
5 minutes while pump
output(s) are off
Master chiller MBB
loses communication
with slave chiller MBB
Slave chiller MBB loses
communication with
master chiller MBB
Master and slave chiller
have the same CCN
address (CCN.A)
LWT read is greater than
LCW Alert Limit, Total
capacity is 100% and LWT
is greater than LWT
reading one minute ago
Cooler EWT or LWT is less
than Brine Freeze (BR.FZ)
Cooler EWT is less than
LWT by 3° F (1.7° C) for
1 minute after a circuit is
started
Pump 1 Service
Countdown (P.1.DN)
expired. Complete pump 1
maintenance and enter
'YES' for Pump 1
Maintenance Done
(P.1.MN) item.
Pump 2 Service
Countdown (P.2.DN)
expired. Complete pump 2
maintenance and
enter 'YES' for Pump 1
Maintenance Done
(P.2.MN) item.
70
ACTION TAKEN RESET
BY CONTROL METHOD
All compressors shut
down. Pump 2 turned
off. Pump 1 will be
started if available.
Manual
Chiller allowed to run if
Pump 1 successfully
starts and flow switch
is closed.
Chiller not allowed to Automatic when
start aux contacts open
Chiller not allowed to Automatic when
start aux contacts open
Chiller not allowed to
start. For models with
dual pumps, the Manual
second pump will be
started if available
All compressors shut
down. For models with
dual pumps, the Manual
second pump will be
started if available
Automatic when
Chiller shut down
aux contacts open
Dual chiller control
disabled. Chiller runs
Automatic
as a stand-alone
machine.
Dual chiller control
disabled. Chiller runs
Automatic
as a stand-alone
machine
Dual chiller routine
disabled. Master/slave
Automatic
run as stand-alone
chillers.
Alert only. No action
Automatic
taken.
Both EWT and LWT
Chiller shutdown
must be at least 6 F
without going through
(3.3 C) above Brine
pumpdown. Cooler
Freeze point
pump continues to
(BR.FZ).
run a minimum of
Automatic for first,
5 minutes (if control
Manual reset thereaf-
enabled).
ter.
Chiller shutdown.
Cooler pump shut off Manual
(if control enabled).
None Automatic
None Automatic
PROBABLE
CAUSE
Wiring error, pump
circuit breaker
tripped, contactor
failure
Wiring error, faulty
pump contactor
(welded contacts)
Wiring error, faulty
pump contactor
(welded contacts)
Wiring error, pump
circuit breaker
tripped, contactor
failure, faulty flow
switch or interlock
Cooler pump failure,
faulty flow switch or
interlock, pump
circuit breaker
tripped
Wiring error, faulty
pump contactor
(welded contacts)
Wiring error, faulty
wiring, failed Slave
chiller MBB module,
power loss at slave
chiller, wrong slave
address.
Wiring error, faulty
wiring, failed master
chiller MBB module,
power loss at Master
chiller.
CCN Address for
both chillers is the
same. Must be
different. Check
CCN.A under the
OPT2 sub-mode in
Configuration at both
chillers.
Building load greater
than unit capacity,
low water/brine flow
or compressor fault.
Check for other
alarms/alerts.
Faulty thermistor,
low water flow.
Faulty cooler pump,
low water flow,
plugged fluid
strainer.
Routine pump
maintenance
required
Routine pump
maintenance
required