5-21
764332-098
25. Display shows:
pH SIGNAL
OPEN CIRCUIT
... and printer prints:
ALARM HH:MM:SS
pH SIGNAL
OPEN CIRCUIT
1. Press
ACK
touch pad to acknowledge alarm.
2. Wiring malfunction – check connections between pH con-
troller and PLC controller.
• Alarm is triggered by:
Signal not present at analog input module Slot 3 1 in 0 + DC
V/I in 0 -.
26. Display shows:
CONDUCT. TOO LOW
CHECK INJECT. SYSTEM
... and printer prints:
ALARM HH:MM:SS
CONDUCT. TOO LOW
CHECK INJECT. SYSTEM
1. Press
ACK
touch pad to acknowledge alarm.
2. Alkaline detergent container empty – check and replace
detergent container as necessary.
3. Acid detergent container empty – check and replace deter-
gent container as necessary.
4. Improper detergent monitoring time – check for detergent
monitoring time in Service mode.
5. Alkaline detergent pump malfunction – check and replace
detergent pump as necessary.
6. Acid detergent pump malfunction – check and replace
detergent pump as necessary.
7. Conductivity probe malfunction – check for calibration or
replace as necessary.
8. Defective sump water fill valve (always open) – check and
replace as necessary.
9. Defective alkaline wash tank dump ball valve (always open)
– check and replace as necessary.
10. Defective acid wash tank dump ball valve (always open) –
check and replace as necessary.
11. Defective rack flush system water fill valve (always open) –
check and replace as necessary.
12. Defective non-recirculating final rinse water fill valve
(always open) – check and replace as necessary.
• Alarm is triggered by:
Conductivity relay signal on analog inputs module Slot 3, 1
in 1+ V/I in 1- and conductivity phase timer is at "0".
Table 5-2. Fault Chart
PROBLEM POSSIBLE CAUSE AND/CORRECTION
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