Hardi Mercury Covamax series, Инструкция оператора

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7 - Fault Finding
1. 2
Hydraulic system
Fault
Possible cause Suggested action
No boom movements when activated. Insufficient hydraulic pressure. Check oil pressure - min. 130 bar, max. 160 bar.
Check hydraulic oil level.
Insufficient oil supply. Oil flow must be min. 10 l/min. and max. 90 l/min.
Check hydraulic oil level.
Poor / corroded electrical connections. Check and clean connections, multi pin
connections etc.
Insufficient power supply. Voltage on activated solenoid valve must be more
than 8 Volts. Use wires of at least 4 mm for power
supply.
Defective relay / diodes in junction box. Check relays, diodes and soldering at PCB in
junction box.
Individual ram does not move. Blocked restrictor. Dismantle and clean restrictor.
Fluid system
Fault
Possible cause Suggested action
No spray from boom when turned on. Air leak on suction line. Check if suction filter O-ring is sealing.
Check suction tube and fittings.
Check tightness of pump diaphragm and valve
covers.
Air in system. Fill suction hose with water for initial prime.
Suction/pressure filters blocked. Clean filters.
Suction hoses or fittings blocked. Check fluid pick up in the tank is free of
obstruction/sedimentation etc.
Lack of pressure. Incorrect pump assembly. Check product pump
Blocked filter Check and clean filter
Pressure dropping. Filters becoming blocked Clean all filters. Fill with cleaner water. If using
powders, make sure agitation is on.
Nozzles worn. Check flow rate and replace nozzles if it exceeds
10%
Sucking air towards end of tank load. reduce or turn off agitation
Vacuum building in main tank. Check that the vent to atmosphere at the top of
the main tank is clear of obstruction.