OPERATOR’S MANUAL
Control Point
®
11001-1489-201702 Rev B
90 / TROUBLESHOOTING
DISPLAYED APR RESPONDS SLOWLY
Probable Cause
If the actual APR displaying on the console is slow responding to ground
speed or target APR changes or stabilizes at the wrong value, the System
Response may require fine tuning.
Corrective Action
1. System Response (SYS RSPNS) constant may be too small. Refer to
Fine-tuning System Response Constants section.
SPINNER ROTATIONAL SPEED INCORRECT
Corrective Action
1. Check PWM OFFSET and PWM settings in SPINNER mode (F8) for
incorrect setting.
2. Check for variations in granular material density dropping onto the
spinners from the conveyor/auger.
3. On proportional valves, increases in electrical coil resistance due to
heat buildup can cause valve position shifts, resulting in speed
changes.
4. Check for drag due to snow and ice buildup.
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