60
Table 41 — Alarm Codes (cont)
LEGEND
PREFIX
CODE
SUFFIX
CODE
DESCRIPTION
REASON FOR ALARM
ACTION TAKEN
BY CONTROL
RESET
TYPE
PROBABLE CAUSE
Ct
.01
Circuit A Welded Contactor
Failure
Controls determine com-
pressor is still running
when circuit should be off
EXV, fan control,
and pump oper-
ate as normal to
save compressor
until high pres-
sure, freeze, or
flow failure condi-
ions occur
Manual
One or more circuit com-
pressor contactors
welded closed.
.02
Circuit B Welded Contactor
Failure
Controls determine com-
pressor is still running
when circuit should be off
EXV, fan control,
and pump oper-
ate as normal to
save compressor
until high pres-
sure, freeze, or
flow failure condi-
ions occur
Manual
One or more circuit com-
pressor contactors
welded closed.
.03
Circuit C Welded Contactor
Failure
Controls determine com-
pressor is still running
when circuit should be off
EXV, fan control,
and pump oper-
ate as normal to
save compressor
until high pres-
sure, freeze, or
flow failure condi-
ions occur
Manual
One or more circuit com-
pressor contactors
welded closed.
FC
.n0
Initial Factory Configuration
Required
No configuration
Unit not allowed
to start
Automatic
Configuration error. Pass-
word may default to
0113.
.nn
Illegal Configuration
Wrong or incompatible
configuration data
Unit not allowed
to start
Automatic
Configuration error.
MC
.nn
Master Chiller Configuration
Error
Wrong or incompatible
configuration data
Unit not allowed
to start in Master-
Slave Control
Automatic
Configuration error. Refer
to Table 43.
P
.01
Water Exchanger Freeze
Protection
Entering or Leaving
Thermistor sensed a
temperature at or below
freeze point.
Unit shut down or
not allowed to
start. Chilled
Water Pump will
be started
Automatic, first
occurrence in
24 hours,
Manual, if
multiple
alarms within
24 hours
Faulty thermistor, faulty
wiring, low water flow
rate, low loop volume, or
freeze conditions.
.05
Circuit A Low Suction
Temperature
Low Saturated Suction
Temperatures sensed for
a period of time.
Circuit shut down
Automatic, first
occurrence in
24 hours,
Manual, if
multiple
alarms within
24 hours
Faulty transducer, faulty
wiring, low water flow
rate, low loop volume,
fouled cooler, or freeze
conditions.
.06
Circuit B Low Suction
Temperature
.07
Circuit C Low Suction
Temperature
.08
Circuit A High Superheat
EXV>98%, Suction
Superheat >54 F (30.0 C)
and SST<MOP for more
than 5 minutes
Circuit shut down
Manual
Faulty transducer, faulty
thermistor, faulty wiring,
faulty EXV, low refriger-
ant charge, plugged or
restricted liquid line.
.09
Circuit B High Superheat
.10
Circuit C High Superheat
.11
Circuit A Low Superheat
EXV
5% and Suction
Superheat is less than
the superheat setting by
at least 5 F (2.8 C) or
SST>Maximum Operat-
ing Pressure for more
than 5 minutes
Circuit shut down
Automatic, first
occurrence in
24 hours,
Manual, if
multiple
alarms within
24 hours
Faulty transducer, faulty
thermistor, faulty wiring,
faulty EXV, or incorrect
configuration.
.12
Circuit B Low Superheat
.13
Circuit C Low Superheat
.14
Cooler Interlock Failure
Cooler Pump Interlock
circuit opens (consists of
chilled water flow system
and chilled water pump
interlock)
Unit shut down or
not allowed to
start
Automatic if
stage=0,
Manual if
stage>0.
Low Water Flow, faulty
wiring or contacts, faulty
water flow switch, or
chilled water pump
problem. Remote lockout
if unit is equipped with an
EMM.
EMM —
Energy Management Module
OAT —
Outdoor Air Temperature
EWT —
Entering Water Temperature
PTC —
Positive Temperature Coefficient
EXV
—
Electronic Expansion Valve
SCT —
Saturated Condensing Temperature
HR
—
Heat Reclaim
SPM —
Scroll Protection Module
LWT —
Leaving Water Temperature
SST
—
Saturated Suction Temperature
MOP —
Maximum Operating Pressure
Summary of Contents for AQUASNAP 30RBA315
Page 77: ...77 Fig 37 Control Schematic 30RB060 080 a30 4619...
Page 78: ...78 Fig 38 Control Schematic 30RB090 150 a30 4620...
Page 79: ...79 Fig 39 Control Schematic 30RB160 190 a30 4622...
Page 80: ...80 Fig 40 Control Schematic 30RB210 300 a30 4622...
Page 81: ...81 Fig 41 Heat Reclaim Control Schematic a30 4622...