ARAG 46742DX1, Installation, Use And Maintenance Manual

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14.3 Troubleshooting
fault cauSe Remedy
The display does not switch on
No power supply • Check power supply connection.
Computer is OFF • Press the ON button
Valve controls take no effect Valves not connected • Connect the connectors
One valve does not open No power supply to valve • Check valve electric connection and operation
Speed reading is erratic
Job start procedure was initiated at a point distant
from field to be sprayed. • Repeat the job start procedure (par. 12.9)
nearby the field.
Output volume readout inaccurate Wrong setup
• Check boom width setting (par. 10.1.2)
• Check flowmeter constant setting (par. 10.4.3)
• Check section valve type setting (par. 10.2.1)
Distance travelled count displayed does not
match actual distance covered
Wrong setup
• Check boom width setting (par. 10.1.2)
• Check connections to speed sensor
Dispensed fluid count displayed does not match
litres/gpm actually dispensed
Wrong setup
• Check flowmeter constant setting (par. 10.4.3)
• Check section valve type setting (par. 10.2.1)
Use of three-way section valves without setting calibrated
backflows
• Perform setting
Unable to reach output volume value set for the
automatic operation
Wrong setup
• Check spray rate setup (par. 11.2.2)
• Check boom width setting
(par. 10.1.2)
System not adequately sized to provide required rate
• Check maximum pressure valve setting
• Make sure control valve is adequate for specific system
Control valve malfunction • Check valve operation
Instantaneous pressure readout inaccurate
Wrong setup • Check full scale setting for pressure sensor
Pressure sensor not calibrated • Perform calibration (par. 13.2.7)
Pressure sensor wrong installation • Check connections to pressure sensor
Instantaneous pressure is not displayed
Wrong setup • Check pressure sensor setting (par. 10.5)
Computer does not receive signals from pressure sensor • Check connections to pressure sensor
Pressure sensor wrong installation • Check connections to pressure sensor
Rpm readout inaccurate Wrong setup • Check rpm sensor constant setting (par. 10.8)
Rpm value not displayed
Monitor does not receive signals from rpm sensor • Check connections to rpm sensor
Rpm sensor wrong installation • Check connections to rpm sensor
Pump failure alarm permanently active Monitor does not receive signals from Pump Protector sensor • Check connections to Pump Protector sensor
14.4 Cleaning rules
- Clean only with a soft wet cloth.
- DO NOT use aggressive detergents or products.
- DO NOT aim water jets directly at monitor and control unit.
Fig. 294
MAINTENANCE / DIAGNOSTICS / REPAIRS