AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 68)

Figure 19
Level 2 Process Temperature Controller Error Messages
Control output
Message Cause
With output unit other
than current output unit
With current output
unit
Alarm
output
Input temperature has
risen beyond the upper
limit of the temperature
range by more than 20
° C (68 ° F)
OFF during reverse
(heating) action, ON
during normal cooling
action. 4 mA during reverse
(heating) action, 20 mA
during normal (cooling)
action.
Issues alarm
outputs in
accordance with
the set alarm
mode.
Input temperature has
fallen below the lower
limit of the temperature
range by more than 20
° C (68 ° F)
ON during reverse
(heating) action, OFF
during normal (cooling)
action. 20 mA during reverse
(heating) action, 4 mA
during normal (cooling)
action.
Issues alarm
outputs in
accordance with
the set alarm
mode.
The thermocouple has
burned out or the short
circuit bar has been
removed. The platinum
RTD has burned out or
A and B have been
short circuited.
OFF Approximately 1 mA
Issues alarm
outputs in
accordance with
the set alarm
mode. Proportional
alarm output is
OFF
(flashes)
Memory failure (E111)
or analog to digital
converter failure
(E333) has occurred.
Temperature controller
must be repaired if
recovery is not made
by turning power off
once and on again.
OFF Approximately 1 mA OFF
When a Type J thermocouple is used, this error message does not display until the temperature has
risen above the normal operating temperature operating range by more than 70 ° C (158 ° F).
When a platinum RTD sensor is used, this message displays when the temperature has fallen to
-99.9 ° C (-147.82 ° F).
7-11 Using the Seven-Day Timer Figure 20
Optional 7-Day Timer
MODE
ON
OFF
RUN
MON TUE WED THU FRI SAT SUN
TIM ADJ PROG 1 DAY SET
CYCLE PROG 2
1 2
START STOP
ON OFF
You can program the seven day timer for weekly ON/OFF
operation of up to sixteen (16) set points. An internal
battery back-up holds settings in memory when the dryer is
de-energized.
Note: The
Power toggle switch must be in the ON
position for normal or programmed dryer operation.
• To bypass programmed operation, switch the manual
override switch on the seven day timer to the
ON
position.
WDMR and WDFR Series Dehumidifying Dryers Page 67