Stratus SAE-C12X, Installation, Operation & Maintenance Instructions Manual

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7. Troubleshooting Guide
Troubleshooting Guide
Malfunction Possible reason Solution
The motor does not
work
Check the air switch. Turn off or replace the air switch.
Check if the voltage is correct. User correct power supply.
The motor burned. Replace the motor.
Start switch burned. Replace the start switch.
Top limiter switch burned. Replace the top limiter switch.
AC contactor burned. Replace the AC contactor.
The motor works
but can’t lift
Pressure valve pressure is too small.
Clockwise adjust the pressure valve( fine adjust-
ment).
Pump station takes in air.
Unscrew check valve on the power unit, and then
start the motor until hydraulic oil flows out from the
check valve.
Hydraulic oil suction hose is detached or broken. Install/replace the suction hose.
Insufficient hydraulic oil. Fill more hydraulic oil.
Does not lowering
Safety lock engaged.
Slightly raise the device and then pull the safety lock
release cable.
Other object inside the columns stops the carriage. Check and remove the objects.
The flow valve needs to be adjusted.
Counterclockwise adjust the flow valve (fine adjust-
ment).
Self - Lowering
Dump valve failure. Replace the dump valve.
Hydraulic oil leaks. Check and repair.
The valve body of the power unit has holes. Replace the valve body.
Raise without load,
but doesn’t raise
with load
The voltage is too low. Install the voltage stabilizer.
Objects in the dump valve. Remove objects from the dump valve.
The pressure valve pressure is too small.
Increase pressure properly( fine adjust the pressure
valve).
Overload. This operation is prohibited.
Lifting is not leveled The cables are not balanced. Balance cables by adjusting the cable’s length.
After raising to the highest point, the motor is still working
and the top limiter switch is disabled.
Replace the top limiter switch.
Loud motor noise
Hydraulic oil pollution. Replace the hydraulic oil.
Overload. This operation is prohibited.
6.3 - Every 6 Month
Hydraulic Pump
1. Check the condition and aging of the hydraulic fluid. Unqualified hydraulic fluid is the main reason to cause valve
failure and reduces the life of the gear pump.
2. Check the noise variation of the motor and gear pump while normal operating.
6.4 - Every 12 Month
1. Visually inspect all structural and mechanical parts to make sure there is no abnormalities have occurred.
2. Check and see if there is anything wrong with the motor, wiring ,top limiter switch and circuit breaker.