Operating instructions

TM 11574A-OI
2-33
Table 2-7 Controller Alarm Indications - Continued
Code
No.
TITLE DESCRIPTION
AL63 Current Over Limit
Alarm 63 is triggered by the current limiting system. If the compressor is ON and
current limiting procedures cannot maintain a current level below the user selected
limit, the current limit alarm is activated. This alarm is a display alarm and is
inactivated by power cycling the unit, changing the current limit via the code select
Cd32, or if the suction modulation valve (SMV) is open beyond the controller
desired point.
AL64
Discharge
Temperature 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 300 F(149 C), or if the sensor 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 30 in Hg (73.20 cm Hg) to 460 psig (32.34 Kg/cm
2). This is a
display 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 30 in Hg (73.20 cm Hg) to 460 psig (32.34 Kg/cm
2). This is a display
alarm and has no associated failure action.
AL68
Condenser
Pressure
Transducer
Failure
Alarm 68 is triggered by a condenser pressure transducer reading outside the valid
range of 30 in Hg (73.20 cm Hg) to 460 psig (32.34 Kg/cm
2). This is a display
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 -76 F (-60 C) to 302 F (150 C). 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.
ERR #
Internal
Microprocessor
Failure
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 #
Internal
Microprocessor
Failure
ERR 0 – RAM failure
Indicates that the controller working
memory has failed.