Presto C-DRY Notice D'installation page 11

Troubleshooting
Problem
If the dryer will not run
The dryer cycles by itself or
runs constantly
The dryer makes a loud noise
and does not run for a
complete cycle
The dryer runs but air stream is
low pressure and/or low
velocity
The IR sensor only "sees"
close range objects
The heater gets hot but no air
stream is produced
The dryer only blows cold air
during a full cycle
The air stream is low pressure
and velocity
Solution
First ensure that the breaker supplying the dryer is operational. If it is, disconnect the power and
remove the dryer cover. Taking suitable precautions to avoid shock hazard, reconnect the power
and check for Voltage at the terminal block. Verify that connections are made correctly.
Ensure that there is no obstruction on or in front of the IR sensor. Clean any dirt or debris off the
sensor lens. If problem persists, replace sensor.
Ensure that the supply Voltage is correct. Dryer will make a loud humming noise if the input
Voltage is too high. Verify Voltage requirement on unit rating label and correct supply as
required. If CBM has been damaged, replace CBM, IR sensor module.
Ensure that the supply Voltage is correct. Dryer will run weakly if the input Voltage is too low.
Verify Voltage requirement on unit rating label and correct supply as required
Ensure that there is no obstruction on or in front of the IR sensor. Clean any dirt or debris off the
sensor lens. If problem persists, disconnect the power and remove the dryer cover and replace
CBM, IR sensor module.
Disconnect the power. Remove the dryer cover. Check VR for speed setting Disassemble the
blower- motor/ fan housing. Replace the fan motor. Reassemble.
Disconnect the power. Remove the dryer cover and check/ ensure heater SW is ON. Disassemble
the blower-motor/fan housing. Test the thermostat for open circuit. Check the heater element for
signs of burning or breakage. Damaged element must be replaced.
Check the output nozzle for obstructions. If none are present, disconnect the power. Remove the
dryer cover. Remove any dust/lint buildup from intake vent slots. Check VR for speed setting.
Disassemble the blower- motor/fan housing. Check the motor brushes for worn condition (≤
30mm graphite remains) and replace them, if necessary.
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