3--23
T-334
Table 3--6 Controller Alarm Indications (Sheet 4 of 4)
AL66 Suction Pressure
Transducer Failure
Alarm 66 is triggered if a suction pressure transducer is out of range.
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
Sensor Fault
Alarm 68 is triggered when the Condenser Pressure Sensor is out of range. This
is a display alarm and has no associated failure action.
AL69 Suction Pressure
Sensor
Alarm 69 is triggered when the Suction Pressure Sensor is out of range. 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. Refer to Table 3--10, page 3--30.
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 0-RAM failure
Indicates that the controller working memory has failed.
ERR 1-Program Memory
failure
Indicates a problem with the controller program.
ERR 2-Watchdog
time-out
The controller program has entered a mode whereby
the controller program has stopped executing.
ERR 3-N/A
N/A
ERR 4-N/A
N/A
ERR 5-A-D failure
The controller’s Analog to Digital (A-D) converter has
failed.
ERR 6-IO Board failure
Internal program/update failure.
ERR 7-Controller failure
Internal version/firmware incompatible.
ERR 8-DataCORDER
failure
Internal DataCORDER memory failure.
ERR 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 ERR code using Morse code as shown below.
E R R 0 to 9
ERR0 = . .-. .-. -----
ERR1 = . .-. .-. . ----
ERR2 = . .-. .-. . . ---
ERR3 = . .-. .-. . . . --
ERR4 = . .-. .-. . . . . -
ERR5 = . .-. .-. . . . . .
ERR6 = . .-. .-. -. . . .
ERR7 = . .-. .-. --. . .
ERR8 = . .-. .-. ---. .
ERR9 = . .-. .-. ---- .
Entr
StPt
Enter Set point
(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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