3-20
T-296
Table 3-6 Controller Alarm Indications (Sheet 3 of 3)
AL64 Discharge Tempera-
ture Over Limit
Alarm 64 is triggered if the discharge temperature sensed is greater than 135
_
C
(275
_
F) for three continuous minutes, if it exceeds 149
_
C (300
_
F), or if the sen-
sor is out of range. This is a display alarm and has no associated failure action.
AL65 Discharge Pressure
Transducer Failure
Alarm 65 is triggered by a compressor discharge transducer reading outside the
valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm
2
(460 psig). This is a dis-
play alarm and has no associated failure action.
AL66 Suction Pressure
Transducer Failure
Alarm 66 is triggered by a suction pressure transducer reading outside the valid
range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm
2
(460 psig). This is a display
alarm and has no associated failure action.
AL67 Humidity Sensor
Failure
Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0%
to 100% relative humidity. If alarm AL67 is triggered when the dehumidification
mode is activated, then the dehumidification mode will be deactivated.
AL68 Condenser Pressure
Transducer Failure
Alarm 68 is triggered by a condenser pressure transducer reading outside the
valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm
2
(460 psig). This is a dis-
play alarm and has no associated failure action.
AL69 Suction Temperature
Sensor Failure
Alarm 69 is triggered by a suction temperature sensor reading outside the valid
range of --60
_
C (--76
_
F) to 150
_
C (302
_
F). This is a display alarm and has no
associated failure action.
NOTE
If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70 and
AL71 will be processed as Controller alarms AL70 and AL71.
The Controller performs self-check routines. if an internal failure occurs, an
“ERR” alarm will appear on the display. This is an indication the Controller needs
to be replaced.
ERROR
DESCRIPTION
ERR 0 -- RAM failure
Indicates that the Controller working memory has
failed.
ERR Internal
Microprocessor
ERR 1 -- Program
Memory failure
Indicates a problem with the Controller program.
ERR
#
Microprocessor
Failure
ERR 2 -- Watchdog
time--out
The Controller program has entered a mode where-
by the Controller program has stopped executing.
ERR 3 -- On board timer
failure
The on board timers are no longer operational.
Timed items such as; defrost, etc. may not work.
ERR 4 -- Internal counter
failure
Internal multi-purpose counters have failed. These
counters are used for timers and other items.
ERR 5 -- A-D failure
The Controller’s Analog to Digital (A-D) converter
has failed.
Entr
StPt
Enter Setpoint
(Press Arrow &
Enter)
The Controller is prompting the operator to enter a set point.
LO
Low Main Voltage
(Function Codes
Cd27--38 disabled
and NO alarm
stored.)
This message will be alternately displayed with the set point whenever the supply
voltage is less than 75% of its proper value.
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