Carrier AQUASNAP MPW015-045 - Manual (Page 49)

49
Table 38 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE
ALARM
OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
PROBABLE
CAUSE
T200 Alert
Cooler Flow/Interlock
Contacts failed to Close
at start-up
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
Chiller not allowed to
start. For models with
dual pumps, the
second pump will be
started if available
Manual
Faulty flow switch or
interlock.
A201 Alarm
Cooler Flow/Interlock
Contacts Opened
During Normal
Operation
Flow switch opens for at
least 3 seconds after
being initially closed
All compressors shut
down. For models with
dual pumps, the
second pump will be
started if available
Manual
Cooler pump failure,
faulty flow switch or
interlock.
A202 Alarm
Cooler Pump Interlock
Closed When Pump is
Off
If configured for cooler
pump control and flow
switch input is closed for
5 minutes while pump
output(s) are off
Chiller shut down
Automatic when
aux contacts open
Wiring error, faulty
pump contactor
(welded contacts)
T203 Alert
Loss of Communication
with slave chiller
Master chiller MBB
loses communication
with slave chiller MBB
Dual chiller control
disabled. Chiller runs
as a stand-alone
machine.
Automatic
Wiring error, faulty
wiring, failed Slave
chiller MBB module,
power loss at slave
chiller, wrong slave
address.
T204 Alert
Loss of Communication
with master chiller
Slave chiller MBB loses
communication with
master chiller MBB
Dual chiller control
disabled. Chiller runs
as a stand-alone
machine
Automatic
Wiring error, faulty
wiring, failed master
chiller MBB module,
power loss at Master
chiller.
T205 Alert
Master and slave chiller
with same address
Master and slave chiller
have the same CCN
address (CCN.A)
Dual chiller routine
disabled. Master/slave
run as stand-alone
chillers.
Automatic
CCN Address for
both chillers is the
same. Must be
different. Check
CCN.A under the
OPT2 sub-mode in
Configuration at both
chillers.
T206 Alert
High Leaving Chilled
Water Temperature
LWT read is greater than
LCW Alert Limit, Total
capacity is 100% and LWT
is greater than LWT
reading one minute ago
Alert only. No action
taken.
Automatic
Building load greater
than unit capacity,
low water/brine flow
or compressor fault.
Check for other
alarms/alerts.
A207 Alarm
Cooler Freeze
Protection Cooler EWT or LWT is less
than Brine Freeze (BR.FZ)
Chiller shutdown
without going through
pumpdown. Cooler
pump continues to
run a minimum of
5 minutes (if control
enabled). Both EWT and LWT
must be at least 6 F
(3.3 C) above Brine
Freeze point
(BR.FZ). Automatic
for first, Manual reset
there after.
Faulty thermistor
(T1/T2), low water
flow.
A208 Alarm
EWT or LWT
Thermistor failure
Cooler EWT is less than
LWT by 3° F (1.7° C) for
1 minute after a circuit is
started
Chiller shutdown.
Cooler pump shut off
(if control enabled).
Manual
Faulty cooler pump,
low water flow,
plugged fluid
strainer.
A220 Alarm Condenser Pump
Interlock Failure to
Close
at Start-Up If configured for con-
denser pump interlock
and the flow switch
input fails to close with-
in 5 minutes after start-
up. Also valid when
configured for con-
denser pump control. Condenser and cooler
pumps shut off.
Chiller shutdown with-
out going through
pumpdown. Manual Failure of condenser
pump or controls.
Wiring error.
A221 Alarm Condenser Pump
Interlock Opened During
Normal Operation If configured for con-
denser pump interlock
and the flow switch
opens for 15 seconds
during normal
operation (or when
the condenser pump
relay is on when con-
denser pump control
is configured.) Condenser and cooler
pumps shut off. Chiller
shutdown without
going through pump-
down. Manual Failure of condenser
pump or controls.
Wiring error.
A222 Alarm Condenser Pump
Interlock Closed When
Pump is Off If configured for con-
denser pump interlock
condenser pump con-
trol, and the flow
switch is closed
when pump relay is off. Chiller is not allowed to
start. Manual Failure of condenser
pump relays or inter-
locks, welded
contacts.