Mec PM-798-A, Manual, Page: 23 / 25

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PM-798 MEC Starter Kit Manual
Page 23
420 Control
thermocouple
open-/short-
circuit
Thermocouple is
open- or short-
circuited.
Check thermocouple connection and polarity.
Check thermocouple wiring.
Is head very cold (less than 3 °C)?
If yes, warm up the head.
Emergency Shutdown,
Automatic Reset
(5 seconds)
421 Limit
thermocouple
open-/short-
circuit
Thermocouple is
open- or short-
circuited.
Check thermocouple connection and polarity.
Check thermocouple wiring.
Is head very cold (less than 3 °C)?
If yes, warm up the head.
Emergency Shutdown,
Automatic Reset
(5 seconds)
422 Control
thermocouple
integrity check
failure
Measured value not
rising during first
minute of burner
firing.
Check thermocouple temperature rise during first
minute of burner firing.
Check thermocouple is properly located in
thermal well.
Report to TDSP: provide logged data.
Emergency Shutdown,
Automatic Reset
(20 minutes)
423 Limit
thermocouple
integrity check
failure
Measured value not
rising during first
minute of burner
firing.
Check thermocouple temperature rise during first
minute of burner firing.
Check thermocouple is properly located in
thermal well.
Report to TDSP: provide logged data.
Emergency Shutdown,
Automatic Reset
(20 minutes)
424 Coolant over-
temperature
Coolant over-
temperature.
Check coolant flow rate.
Check coolant inlet temperature.
Report to TDSP: provide logged data.
Normal Shutdown,
Automatic Reset
(5 seconds)
425 Coolant under-
temperature
Coolant under-
temperature.
Check coolant flow rate.
Check coolant inlet temperature.
Report to TDSP: provide logged data.
Normal Shutdown,
Automatic Reset
(5 seconds)
501 Power meter
communications
checksum failure
Power meter
communications
checksum failure.
Internal communication problem.
Report to TDSP: provide logged data.
Normal Shutdown,
Automatic Reset
(3 minutes)
502 Power meter
communications
timeout
Power meter
communications
timeout.
Internal communication problem.
Report to TDSP: provide logged data.
Normal Shutdown,
Automatic Reset
(3 minutes)
503 Power meter
registration
timeout
Power meter
registration timeout.
Internal communication problem.
Report to TDSP: provide logged data.
Normal Shutdown,
Automatic Reset
(3 minutes)
504 VI protection
reset
VI protection
microcontroller has
reset.
Internal problem.
Report to TDSP: provide logged data.
Emergency Shutdown,
Automatic Reset
(3 minutes)
505 Under-voltage trip Grid voltage level is
too low.
Check grid voltage. Emergency Shutdown,
Automatic Reset
(3 minutes)
506 Under-voltage trip Grid voltage level is
too low.
Check grid voltage. Emergency Shutdown,
Automatic Reset
(3 minutes)
507 Under-voltage trip Grid voltage level is
too low.
Check grid voltage. Emergency Shutdown,
Automatic Reset
(3 minutes)
508 Over-voltage trip Grid voltage level is
too high.
Check grid voltage. Emergency Shutdown,
Automatic Reset
(3 minutes)
509 Over-voltage trip Grid voltage level is
too high.
Check grid voltage. Emergency Shutdown,
Automatic Reset
(3 minutes)
510 Over-voltage trip Grid voltage level is
too high.
Check grid voltage. Emergency Shutdown,
Automatic Reset
(3 minutes)
511 Under-frequency
trip
Grid frequency is too
low.
Check grid frequency. Emergency Shutdown,
Automatic Reset
(3 minutes)
512 Over-frequency
trip
Grid frequency is too
high.
Check grid frequency. Emergency Shutdown,
Automatic Reset
(3 minutes)
513 Short-circuit trip High current
measurement.
Check engine current. Emergency Shutdown,
Automatic Reset
(3 minutes)