Trouble shooting – Yokogawa 414 Batch Controller User Manual
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52 Trouble Shooting
8. TROUBLE SHOOTING
Batcher does not reset.
The Signal Timeout has been set to an excessively long period and has not
timed out at the end of the last batch.
Batch will not start or relay 1 will not close.
Ensure that the instrument has not timed out as controlled by the Signal
Timeout and that a Flow Alarm condition does not prevail. Pressing the
Stop switch will cancel this condition. Check for a fault on the flow input
before restarting.
Batcher stops midway through a batch.
This could be due to the Signal Timeout having timed out. Check for a fault
in the system. Ensure that the Signal Timeout period is significantly longer
than the period between pulses from the flowmeter at the minimum
flowrate.
No display.
Check power to the instrument.
All 88888888 displayed.
The Batcher will display all eights on power up for 4 seconds as a display
test. If it continues to display all eights after this period, this is symptomatic
of the power supply voltage being low. Check the power input voltage.