8
TROUBLESHOOTING AND CORRECTIVE ACTIONS
SYMPTOM
CORRECTIVE ACTION: FIRST-TIME INSTALLED HAND
DRYERS
The dryer does not run
Check breaker supplying the dryer is operational; check
power cord is correctly installed in the unit, and the con-
nection has been made correctly. Take suitable precaution
to avoid shock hazard.
The dryer cycles by itself and
runs constantly
Ensure there is no obstruction on or in front of the IR
sensor. Clean any dirt off the sensor. If problems persists,
replace sensor. Adjust sensor sensivity if needed.
The dryer is very loud and
does not run for a complete
cycle
Check supply voltage is correct. If PBC is damaged due to
incorrect voltage, replace unit as well as sensor and timer.
Check if carbon brushes are worn (≤ 10 mm graphite remai
-
ning) and replace if needed.
The dryer runs, but the
airspeed is low
Check supply voltage is correct. The dryer will run slowly if
the input voltage is too low. Check if potentiometer for air
speed is adjusted too low.
SYMPTOM
CORRECTIVE ACTION: USED HAND DRYERS
The dryer does not run
First ensure the breaker supplying the dryer is operational.
If it is, disconnect the power and remove the cover. Repla-
ce PCB and IR sensor. Taking suitable precaution to avoid
shock hazard, reconnect the power and check for voltage
on the terminal block.
The IR-sensor detects only
close range objects
Clean any dirt off the sensor lens. If problem persists,
disconnect the power and remove the cover. Taking
suitable precaution to avoid shock hazard, try carefully
adjusting the sensitivity range (see section regarding this).
Reconnect the power. If problem persists, replace IR sensor
and timer.
The dryer gets hot, but there is
no air stream
Disconnect the power. Remove the cover and disassemble
the blower/fan unit. Replace motor.
The dryer blows only cold air
during a full cycle
Disconnect the power. Remove the cover and open the mo-
tor housing. Verify ”Power SW for heater” on PCB is ”ON”.
Check heating element for open circuit and signs of defects
caused by overheating. Replace defect heating element.
The air pressure is low
Check the output nozzle for obstructions. If none, discon-
nect the power and remove the cover. Remove any dirt from
the inlet. Disassemble the blower/fan unit, check if motor
brushes are worn (≤ 10 mm graphite remains). Replace
brushed and/or motor, if necessary.
