AEC AP Series Large Dehumidifying Dryer - Manual (Page 80)

Large Dehumidifying Dryers Controls 79
Common Text Descriptions
CLS FAIL
(Device Failure to
Close)
Generated when a valve or contactor is commanded to close and the position
feedback does not indicate that it is closed after a brief delay.
OPN FAIL (Device
Failure to Open)
Generated when a valve or contactor is commanded to open and the position
feedback does not indicate that it is opened after a brief delay.
AIR FAIL
(No Air Flow or
Pressure Detected)
Generated when air flow is supposed to be detected and it is not.
AIR SHORT
(Improper Air Flow
Detected)
Generated when air flow is detected when it is not supposed to be.
OVERLOAD Alarms Generated when the motor overload opens, the alarm is commonly associated with
a piece of rotating equipment that is consuming too much current.
FUSE FAIL
(Over current
Protection Device
Open)
Generated when a monitored fuse opens.
LEFT/RIGHT Fail
Generated when the main air valve is commanded to a specific position and the
position feed back does not indicated that the valve has achieved that position
within an allotted time
CLOSED/OPEN
LOOP FAIL
Generated when the regeneration heat exchange valve is commanded to a
specific position and the feed back does not indicate that the valve has achieved
that position within an allotted time.
SENSOR
Generated when a failure is detected in a process sensing element. The failure is
commonly an open circuit condition.
HIGH TEMP or HI
TEMP
Generated when a monitored temperature rises above a pre-set or calculated limit.
LOW TEMP or LO
TEMP Generated when a monitored temperature falls below a pre-set or calculated limit.
LOOP BREAK
Generated when a temperature is supposed to be rising due to the assumed
application of heat but is not.
LOW HEAT
Generated when a regeneration bed does not reach the regeneration temperature
set point at any time during the heating portion of the regeneration cycle.
HIGH SURFACE
Generated when a components surface temperature thermal safety switch opens.
BURN ON
Generated when a heating element is not supposed to be consuming power but is.
BURN OUT
Generated when a heating element is supposed to be consuming power but is not.