ABP Series |
Blower Purge Desiccant Air Dryer
34
Alarm Status Screen
ALARM STATUS SCREEN
The Alarm Status screen gives the user the option to check the
status of each alarm.
Reset: Rests all alarms (only if the problems have been
corrected).
Main Menu: Navigate back to the Main Menu.
POSSIBLE ALARMS
Below is a list of each alarm with description of cause,
each of which will cause the unit to stop functioning until
it is repaired. The following will also cause the common
shutdown alarm dry contacts to change states.
Blower Overload: Alarm is given if the motor starter
protector (MSP) circuit breaker trips. This is caused by the
following:
• Overcurrent due to motor failure
• MSP not set properly
• Loss of power on one leg of the 3-phase circuit
The Blower Overload alarm must be reset manually once
the problem has been corrected.
NOTE:
Use caution when
resetting the MSP, the operator must ensure the power is
removed from the panel before proceeding.
Blower Not Running: Alarm is given if the PLC sends
the signal for the blower motor to start but the contactor
doesn’t pull in to run. This can be caused by a break in the
wiring, a bad contactor, or a bad PLC terminal connection.
This alarm will automatically reset once the problem has
been corrected.
Over Temperature: alarm is caused by the temperature
exceeding the maximum allowed temperature in the
heater sheath or heater outlet. Possible causes for
exceeding temperatures are as follows:.
• A contactor has become stuck in the closed
position
• A thermocouple has failed high (out of range)
• A thermocouple wire has been disconnected or
broken
There are fail safes in place to ensure that, once the heater
has reached the high limit, it will shut off and cool down. If
this alarm continues to happen, the user will need to find
and correct the issue. The alarm will automatically reset
once the temperature falls below a certain set point.
Heater Outlet Low Temp: Alarm is visible if the heater
outlet temperature does not reach 200°F within 30
minutes of starting the heating cycle. There are several
reasons as to why the heater might not reach the
temperature in time. They are as follows:
• Extremely cold ambient temperatures will cause
the heater to not reach temperature. Blower
pulls in cold air and pushes it across the heater
• Contactor(s) has failed to close
• The blower is not running
• The thermocouple has failed
• Loss of power to one or more legs of the 3-phase
power circuit
This alarm will automatically reset once the problem has
been corrected.
Heater Outlet Over Temp: See Over Temperature alarm
above.
Regen Outlet T/C Fail: Alarm happens when the
thermocouple becomes out of range. This happens
when there is a break in the thermocouple wires or if the
thermocouple is bad. This alarm will reset automatically
once the issue has been corrected.
Heater Outlet T/C Fail: See Regen Outlet T/C Fail above.
Regeneration Pressure Equal: Alarm occurs when the
pressure in both vessels are either both above or below
AIRCEL PROGRAMMABLE CONTROLLER (APC)
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