Carrier 69NT40-511-1 Operating And Service Manual page 51

CODE
TITLE
#
AL63 Current Over Limit
Discharge
Temperature Over
AL64
Limit (CPDT)
Discharge Pressure
AL65 Transducer Failure
(DPT)
Suction Pressure
AL66 Transducer Failure
(SPT)
Humidity Sensor
AL67
Failure
Condenser Pressure
AL68 Transducer Failure
(CPT)
Suction Temperature
AL69 Sensor Failure
(CPSS)
If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70
and AL71 (See Table 3-7) will be processed as Controller alarms AL70 and AL71.
Internal
ERR ERR
Microprocessor Microprocessor
#
Failure
Enter Setpoint
Entr
(Press Arrow &
StPt
Enter)
Low Mains Voltage
(Function Codes
LO Cd27--38 disabled
and NO alarm
stored.)
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 allowed to open to 100%
and the suction solenoid valve is allowed to open.
Alarm 64 is triggered if the discharge temperature is sensed greater than 135_C
(275_F) for three continuous minutes, if it exceeds 149_C (300_F), or if the
sensor is out of range. This is a display alarm and has no associated failure
action.
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
display alarm and has no associated failure action.
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
alarm and has no associated failure action.
Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0%
to 100% relative humidity. If alarm AL67 is active and the dehumidification mode
was previously activated, then the dehumidification mode will be deactivated.
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
display alarm and has no associated failure action.
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
The Controller performs self-check routines. if an internal failure occurs, an ERR
#0--5 will appear on the display. This is an indication the Controller needs to be
replaced.
ERROR
#0 -- RAM failure
#1 -- Program Memory
failure
#2 -- Watchdog time--out
#3 -- On board timer
failure
#4 -- Internal counter
failure
#5 -- A-D failure
The Controller is prompting the operator to enter a set point.
This message will be alternately displayed with the set point whenever the mains
voltage is less than 75% of its proper voltage.
3-13
DESCRIPTION
2
2
(460 psig). This is a display
2
DESCRIPTION
Indicates that the Controller working memory has
failed.
Indicates a problem with the Controller program.
The Controller program has entered a mode whereby
the Controller program has stopped executing.
The on board timers are no longer operational. Timed
items such as; defrost, etc. may not work.
Internal multi-purpose counters have failed. These
counters are used for timers and other items.
The Controller's Analog to Digital (A-D) converter has
failed.
(460 psig). This is a
(460 psig). This is a
T-268-07