12: Condition
Blank/Bad Wall Mount Display
Check voltage on display for 9-15VDC between
1-4 (right to left) on RS485. If correct, replace
display only, if no/low go to step 13D.
Drive comm power
Check voltage on display for value 9-15VDC
between 1(-) & 4(+) (right to left) on wiring
harness. If correct, replace display only, if below
9VAC – check AC mains power for value above
200VAC, if ZERO replace drive.
Display comm power
Step 12C Step 12D
When a display is completely blank, typically the pump is not powered; this can
be caused by a tripped breaker or possibly related to external automation.
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