Technical information

6-12 TROUBLESHOOTING
Alarm
Regeneration of the
desiccant was unsat-
isfactory. Desiccant
exhaust did not reach
a satisfactory tem-
perature within the
correct time during
the regeneration
cycle.
WARNING:
Only
qualified electrical ser-
vice personnel should
examine and correct
problems that require
opening the dryer’s
electrical enclosure or
checking electrical cur-
rent to diagnose the
cause of a problem.
ALARMS
!
SHUT
DOWN
TEMP. REGEN.
AIR
FLOW
E
SC Carousel Dehumidifying Dryer UGD001/1196
When a yellow “passive” alarm lights, the dryer has detected a
problem that could prevent correct drying of your material.
When a malfunction triggers a passive alarm:
◆ The alarm light (or lights) turns on.
◆ The dryer continues to operate.
PASSIVE
ALARMS
Possible cause
Is the regeneration filter
clogged?
Are there any leaks in the
regeneration air circuit?
Was there an electrical
short in a heater relay?
Did a regeneration heater
element fail?
Did the regeneration
blower fail, causing the
heater box to overheat?
Is the desiccant contami-
nated?
Solution
Clean the regeneration filter.
Check hoses, gaskets and O-
rings. Replace any that are
cracked, torn or displaying
excessive wear. Make sure
hose clamps are secure.
Disconnect power. Check con-
tinuity of the regeneration
heater relay outputs. See
Checking Switches and
Heater Relays.
Check the regeneration heater
elements. Only qualified elec-
trical service personnel should
check amperages and voltages
of heater wires at the front of
the dryer. See Replacing
Heater Elements.
❒ Disconnect power. Check
the blower fuses. Replace if
needed. See Replacing Fuses.
❒ Check motor current against
voltage and amp rating on the
motor nameplate. If currents,
do not match, make sure the
transformer is wired correctly.
If the transformer is wired cor-
rectly, replace the blower.
If air and electrical circuits
work correctly, the problem
probably is contaminated des-
iccant. See Replacing
Desiccant Tanks.