Despatch Protocol Plus Controller (Heat Only) - Manual (Page 45)

Protocol Plus Owner’s Manual M AINTENANCE & T ROUBLESHOOTING
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
[email protected]
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