Passive Alarms - Conair W Series User Manual

Central
When supplied for central
drying applications, these
shutdown alarms are not
available.
Problem
Process Temperature
Deviation – The process
temperature exceeds the
deviation band as entered for
the specified time. Default
values are 10°F {6°C} for 5
seconds.
Process Low Temperature –
The process temperature is
less than the low temperature
setpoint for the specified time.
Default values are 70°F
{21°C} for 20 seconds.
Regeneration Temperature
Deviation – The regeneration
temperature exceeds the
deviation band for the
specified time. Default values
are 10°F {6°C} for 5 seconds.
6 - 1 2 l Tr o u b l e s h o o t i n g
Pa s s i v e A l a r m s
If the amber Acknowledge Alarm LED is blinking, the alarm is a passive alarm.
The dryer continues to operate, but this problem could prevent correct drying of
your material. Note that when the Acknowledge Alarm button is pressed once, the
blinking amber LED becomes solid.
i
NOTE: Passive alarms can be configured as shutdown alarms (see the previous Shutdown Alarms
section). See page 4-25, screen 62 for instructions.
Possible cause
One of the solid state relays (SSRs)
failed in the closed position.
Defective process heater.
The output on the board has failed.
The process RTD is loose or has fallen
out.
The air hose connections are loose.
Precooler water is too cold, or the water
flow rate is too high.
The output on the board has failed.
Flow control solenoid is stuck open.
The process RTD is loose or has fallen
out.
Process heater has failed.
One of the SSRs has failed.
The regeneration RTD is loose or has
fallen out.
The air hose connections are loose.
The output on the board has failed.
Defective regeneration heater.
Solution
Replace the failed solid state relays (SSRs).
Check the heater fuses and resistance
across each leg of the process heater.
Replace the board.
Check the process RTD and tighten if
needed.
Tighten all air hose connections.
Check water temperature and flow settings.
Adjust as necessary.
Replace the board.
Replace the valve.
Check the process RTD and tighten if
needed.
Check the heater fuses and resistance
across each leg of the process heater.
Replace the failed SSRs.
Check the regeneration RTD and tighten if
needed.
Tighten all air hose connections.
Replace the board.
Check the heater fuses and resistance
across each leg of the regeneration heater.