Service manual

T -318
3-- 20
Table 3-8 Controller Alarm Indications (Sheet 3 of 3)
Code
No.
TITLE DESCRIPTION
AL66
Suction Pressure
T ransducer 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
T ransducer 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
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 -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.
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.
ERR
#
Internal
Microprocessor
Failure
ERROR DESCRIPTION
ERR 0 -- RAM failure
Indicates that the controller working memory has
failed.
ERR
#
Internal
Microprocessor
Failure
EER 1 -- Program Memory
failure
Indicates a problem with the controller program.
EER 2 -- W atchdog
time-out
The controller program has entered a mode whereby
the controller program has stopped executing.
EER 3 -- N/A N/A
EER 4 -- N/A N/A
EER 5 -- A-D failure
The Controller’s Analog to Digital (A-D) converter
has failed.
EER 6 -- IO Board failure Internal program/update failure.
EER 7 -- Controller failure Internal version/firmware incompatible.
EER 8--DataCorder failure Internal DataCorder memory failure.
EER -- 9 Controller failure Internal controller memory failure.
In the event that a failure occurs and the display cannot be updated, the status
LED will indicate the appropriate EER code using Morse code as shown below .
E R R 0 t o 9 E R R 0 = . . -- . . -- . -- -- -- -- --
ERR1 = . .--. .--. . --------
ERR2 = . .--. .--. . . -- -- --
ERR3 = . .--. .--. . . . -- --
ERR4= . .--. .--. ....--
ERR5= . .--. .--. .....
ERR6= . .--. .--. --....
ERR7 = . .--. .--. -- -- . . .
ERR8 = . .--. .--. -- -- -- . .
E R R 9 = . . -- . . -- . -- -- -- -- .
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.