Problem 11
Load drum (1, 2, or 3) will not reach maximum speed.
POSSIBLE CAUSES
Partial control from handle to controller; Partial control voltage from controller
to pump EDC or motor PCP; Pump or motor is damaged; Node fault.
When moving selected load drum control handle fully in both directions,
does DRUM screen approach 100% pump control for each pump?
Yes
No
When moving load drum handle fully in both directions, does DRUM screen
approach 100% pump and motor command for each pump and motor?
Replace control handle.
Check for zero volt at rest and 24 volt at full speed and coil
resistance of around 19 ohms at pump EDC or 24 to 26
ohms at motor PCP.
(See Section 3 - Checking Electrical Inputs/Outputs).
Consult dealer/factory.
Yes
Voltage and Coil Ok
Remove plug at motor port M5 and check orifice for obstruction.
(See Section 2 - Motor Components).
Repair or replace coil or wiring.
Obstruction
No Obstruction
Clean or replace orifice.
Check pump and motor for leakage.
(See Section 2 - Motor Leakage Test).
Repair or replace pump(s) or motor(s).
Voltage and/or Coil not Ok
No
When moving problem handle fully in both directions,
does selected DRUM screen read 0.5 to 2.4 volts in
raise or 2.6 to 4.5 volts in lower direction?
Yes No
Replace control handle or repair wiring.
CHECKS
Check selected drum speed calibration screen for 100% reading.
Yes
No
Make proper
adjustment.
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