Figure 29. Protocol 3 Heater On Indicator Light; Table 12. Error Messages, Possible Causes, And Remedial Steps; Table 13. Relay Assignments - Despatch LCC Series Owner's Manual

LCC_LCD1-16/51 Oven Owner's Manual
Check high limit safety status light,
column. High limit light should not be ON. If light is on, reset high limit and test
oven again.
Table 12 lists common error messages, possible problems and remedies. Refer to
Protocol 3 manual for further troubleshooting hints.

Table 12. Error Messages, Possible Causes, and Remedial Steps.

Alarm Status
HI LIMIT LED ON
DEV HOLD LED flashing
Top PV displays OPEN
HLPV displays OPEN
Functions assigned to the five Protocol 3
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Figure 29. Protocol 3 Heater ON Indicator Light.

Possible Problem
•
Problem with thermocouple
•
High Limit setpoint has
been exceeded.
Oven temperature has not
entered (or dropped out of) the
Auto Hold band and the soak
timer has stopped
Control thermocouple is
disconnected or broken
High Limit thermocouple is
disconnected or broken

Table 13. Relay Assignments

Relay Number
Position #1
Position #2
Position #3
Position #4
Position #5
, on the right button/indicator light
Next Step
Once the problem has
corrected, press RESET.
Program a slower ramp rate or
if oven is not heating check
heater circuit.
Repair or replace the
thermocouple.
Repair or replace the
thermocouple.
TM
relays are listed on Table 13.
Circuit
Water Cooling
Unused
N2 Purge option
N2 Maintain option
End of Cycle Alarm
C244, 320207, REV B
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