Manitowoc Published 10-01-2012, Control # 045-08 10-25
777 SERVICE MANUAL TROUBLESHOOTING
10
CHECKS
Diagnostic display screen A1 displays voltage for problem system handle in neutral position?
Problem 23
System pump will not return to neutral.
POSSIBLE CAUSES
System control handle is damaged; System pump EDC is damaged or
out of adjustment; System pump is not centered or damaged.
NoYes
Repair or replace system
control handle or wiring.
With system handle in neutral does diagnostic display screen
FUNCTION display command activity for pump?
Consult dealer/factory. Does system pump EDC return to neutral?
(See Test 13.)
Adjust pump neutral.
(See Test 13.)
Repair or replace
system pump.
Does system pump EDC return to neutral?)
NoYes
NoYes
No
Replace system pump EDC.
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