Specifications

Table 33 — Alarm and Alert Codes
ALARM/ALERT
CODE
ALARM OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
PROBABLE
CAUSE
0 — No Alarms or Alerts
Exist
— ———
1.xx See CPM subcodes
below
Compressor A1 Failure See CPM subcodes
below
See CPM subcodes
below
Manual See CPM subcodes
below
2.xx See CPM subcodes
below
Compressor A2 Failure See CPM subcodes
below
See CPM subcodes
below
Manual See CPM subcodes
below
5.xx See CPM subcodes
below
Compressor B1 Failure See CPM subcodes
below
See CPM subcodes
below
Manual See CPM subcodes
below
6.xx See CPM subcodes
below
Compressor B2 Failure See CPM subcodes
below
See CPM subcodes
below
Manual See CPM subcodes
below
CPM SUBCODES
(xx)
x.0 — No Error — — — —
x.1 Alarm High Pressure Switch
Trip
HPS input to CPM
module open
Comp. shut down Manual/Button Loss of condenser air/
water flow. Operation
beyond chiller capability.
Liquid valve not open.
x.2 Alarm No Motor Current CPM reads less than
10% of MTA on all legs
for >3 seconds
Comp. shut down Manual/Button Power supply discon-
nected, blown fuse(s),
wiring error, contactor
not energized, faulty
current toroid, motor
overload tripped
x.25* Alarm Current Imbalance
>10% (Alarm)
CPM measures current
balance between
phases greater than
10% for 25 minutes
Circuit shut down Manual/Button Loose terminals on
power wires. Poor
power supply. Disabled
only if alarm feature is
enabled in
x.27* Alert Current Imbalance
>10% (Warning)
CPM measures current
balance between
phases greater than
10% for 25 minutes
None — Loose terminals on
power wires. Poor
power supply. Displayed
only if alarm feature is
disabled in
x.3 Alarm Current Imbalance
>18%
CPM measures current
balance between
phases greater than
18% for 25 minutes
Circuit shut down Manual/Button Loose terminals on
power wires.
Poor power supply.
x.35 Alarm Single Phase Current
Loss
CPM measures current
imbalance between
phases greater than
20%
Circuit shut down Manual/Button Blown fuse, wiring error,
loose terminals.
x.4 Alarm High Motor Current CPM detects high cur-
rent compared to MTA
setting
Comp. shut down Manual/Button Operation beyond chiller
capability, improperly
punched configuration
header, blown fuse
x.5 Alarm Ground Fault CPM detects ground
current (2.5 ± 2.0 amps)
Comp. shut down Manual/Button Motor winding(s) gone
to ground, wiring error,
loose plug connector,
current toroid plugs not
facing same direction.
x.55* Alarm Voltage Imbalance >3%
(Alarm)
CPM measures voltage
imbalance between
phases greater than 3%
for 25 minutes
Circuit shut down Manual/Button Compressor fault, local
utility supply imbalance,
Poor power supply. Dis-
played only if alarm fea-
ture is enabled in
x.57* Alert Voltage Imbalance >3%
(Warning)
CPM measures voltage
imbalance between
phases greater than 3%
for 25 minutes
None — Compressor fault, local
utility supply imbalance.
Displayed only if alarm
feature is disabled in
x.6 Alarm Voltage Imbalance >7% CPM measures voltage
imbalance between
phases greater than 7%
for 25 minutes
Circuit shut down Manual/Button Compressor fault, local
utility supply imbalance
x.7 Alarm Volt Phase Reversal CPM detects incoming
power supply out of
phase
Chiller shut down and
not allowed to start
Manual/Button Leads at CPM board
not connected. Supply
power not in phase;
interchange any 2
incoming leads.
x.75 Alarm Contactor Failure CPM detects min. 10%
of MTA for 10 seconds
after shutting off com-
pressor contactor. Oil
solenoid is energized.
All remaining compres-
sors shut down. All
loaders deenergized.
Min. load valve of af-
fected circuit energized
(if equipped)
Manual/Button Faulty contactor, con-
tactor welded, wiring
error.
x.8 Alarm Current Phase Reversal CPM detects phase re-
versal from toroid
reading
Circuit shut down Manual/Button Multiple terminal block
power supply leads not
in phase. Toroid wire
harness crossed, toroid
not all facing same
direction
44