User guide
Protocol Plus Owner’s Manual MAINTENANCE & TROUBLESHOOTING
Version 2 45
Copyright © 2010 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.
6. Maintenance
6.1. Replacement Parts
To order or return parts, contact the Service Products Division at Despatch. The Service
Products features our Response Center for customer service. When returning parts, a
Despatch representative will provide you with an MRA (Material Return Authorization)
number. Attach the MRA number to the returned part for identification. When ordering
parts, expedite your process by providing model number, serial number and part number.
Global Headquarters
Contact
Service & Technical
Support
Despatch Industries
8860 207th Street
Lakeville, MN 55044
USA
International/Main: 1-952-469-5424
US toll free: 1-888-337-7282
Fax: 1-952-469-4513
info@despatch.com
www.despatch.com
Service: 1-952-469-8230
US toll free: 1-800-473-7373
Service @despatch.com
7. Troubleshooting: Error Messages and Alarm
Table 15 lists the more common error messages, the possible problems and remedies.
Table 15. Error Messages and Next Steps.
Alarm Status
Possible Problem
Next Step
Hi-Limit LED flashing
• Problem with thermocouple
• Hi-limit setpoint has been
exceeded.
Once the problem has corrected,
press Reset.
Soak LED flashing
Oven temperature has not
entered (or dropped out of) the
soak band and the soak timer
has stopped
Program a slower ramp rate or if
oven is not heating check heater
circuit.
Top LED displays OPEN
and lower LCD displays
CONTROL SENS ERR
Control thermocouple is
disconnected or broken
Repair or replace the
thermocouple.
Lower LCD displays HI LIM
SENS ERR
Hi limit thermocouple is
disconnected or broken
Repair or replace the
thermocouple.
Lower LCD displays HIGH
LIMIT ALARM
Hi limit temperature setpoint
has been exceeded
Determine if:
• the setting is too close to the
setpoint
• the SSR is defective
• calibration is incorrect
Err4
Analog to digital conversion
circuit fault. Thermocouple or
control hardware failure.
Test thermocouple or consult
factory
Err5 (Beep code: five beeps
Program memory fault. Control
Consult factory