Bobrick AirCraft B-701, Руководство по устранению неисправностей и информации, Страница: 12 / 66

Page 6
Diagnostic Sheet For AirCraft
®
, AirGuard
™
&
AirPro
™
Dryers.
Problem
Possible Cause Possible Solution
AUTOMATIC
1. Dryer does not run a) No electricity supply Check main supply / wiring
b) Dirty control lens
c) Installation fault Clean control lens
Check service manual for possible
wiring mistakes
d) Worn motor brushes Check length of brushes; replace if
less than ½"
e) Element open circuit Return dryer to Bobrick for repair
f) Control nonstart Replace control
g) Triac open circuit Replace triac
2. Sparks from dryer Worn motor brushes Replace motor brushes
3. Dryer runs at low speed a) Worn motor brushes Replace motor brushes
b) Triac halfwave Remove white wire from triac; no
difference, replace triac
c) Control halfwave Remove white wire from triac; dryer
stops, replace control
4. Dryer runs continuously a) Triac short circuit Remove white wire from triac; no
difference, replace triac
b) Control faulty Remove white wire from triac; dryer
stops, replace control
5. Dryer cycles on and off Control Replace control
6. Dryer sometimes runs Dirty control lens Clean control lens
Control Replace control
7. Dryer is oversensitive Control Replace control
8. Dryer blows cold air or
motor runs fast Heating element Return dryer to Bobrick for repairs
9. Grinding noise from dryer a) Worn motor brushes Replace motor brushes
b) Fan cage is bent or
damaged Return dryer to Bobrick for repairs
10. Dryer does not run and
heating element glows Worn motor brushes Replace motor brushes; if still not
functioning after replacing the motor
brushes, return dryer to Bobrick for
repairs.
TOUCHBUTTON
1. Dryer does not run a) No electricity supply Check main supply / wiring
b) Installation fault Check service manual for possible
wiring mistakes
c) Tabs are not connecting Turn off power, remove cover and
bend tabs closer to sensor board
d) Worn motor brushes Check length of brushes; replace if
less than ½"
e) Element open circuit Return dryer to Bobrick for repair
f) Timer assembly nonstart Perform Screwdriver Test (see test
instructions)
2. Sparks from dryer Worn motor brushes Replace motor brushes
3. Dryer does not run and
heating element glows Worn motor brushes Replace motor brushes; if still not
functioning after replacing the motor
brushes, return dryer to Bobrick for
repairs.
4. Dryer runs at low speed a) Worn motor brushes Replace motor brushes
b) Timer assembly Replace timer assembly
5. Dryer runs continuously b) Timer assembly Replace timer assembly
6. Dryer blows cold air Heating element Return dryer to Bobrick for repair
7. Grinding noise from dryer a) Worn motor brushes Replace motor brushes