Owner manual

RAD Oven Series Owner’s Manual TROUBLESHOOTING
Version 1 33
Copyright © 2012 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and
retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
Difficulty
Probable Cause
Suggested Remedy
Fan wheel seated too low
on fan shaft
Adjust fan wheel for 3/16" clearance between
wheel and inlet ring
Unbalanced fan wheel
Replace fan wheel
Excessive vibration
Dirty fan wheel
Clean fan
Unbalanced fan wheel
Replace fan wheel
Oven will not
control at setpoint
High Limit set too low
Set the High Limit higher.
Protocol 3 controller
malfunction
Replace controller
SCR malfunction
Replace SCR and/or check control output
voltage.
Air friction of recirculation
fan
Open exhaust air vent. Unit will not control
below minimum operating temperature with
vent closed.
Heater does not
shut down until
temperature
reaches the High
Limit setting
Protocol 3 controller
malfunction
Replace controller.
SCR malfunction
Replace SCR
Danger!
Electrical panels contain high voltage. Disconnect and lock out
the power supply before working inside any electrical panels.
Failure to lock out the power supply can result in death or injury.