ALFRA AHP-M1 Manual De Instrucciones página 27

tab. 4 error analysis
Error
The electric motor turns
only slightly or does not
provide full power
The connected tool does
not move
Check
Is an extension cable
or cable drum used for
connection to the power
supply?
Is the deployed tool at
the end position?
Is the tool subject to
high hydraulic pressure?
Check the starting and
operating capacitors
Are the emergency stop
switch and the
foot-operated switch
released?
Is the power supply
adequate?
Does the motor turn?
Are the hydraulic
couplings connected
correctly?
Does the magnetic valve
open and allow oil to
flow to the tool?
Press hard on the plastic
cap of the valve and
detect a small movement
Check the voltage supply
of the magnetic valve
Cause
The cable is not rolled
out completely
The power loss (electrical
resistance) is too high
The pump can start
only to a limited
extent against the
counter pressure
(approx. 200-300 bar)
The starting or operating
capacitor is defective
The emergency stop
switch is actuated or the
foot-operated switch
is actuated beyond the
pressure point (20 kg)
See above
The quick-release
couplings are not
latched completely or
the coupling screwed
joint is not closed
completely The hydraulic
couplings are self-
closing and open only
when they have been
inserted or screwed in
completely
to the limit stop
The hydraulic coupling is
dirty and does not close
correctly
The magnetic valve is
defective or overheated
Incorrect control signal
or circuit-board
defective
Correction
Roll out the cable
completely
Use a shorter extension
cable or a cable with
larger cable
cross-section
Allow the tool to travel
back or reduce load on
the hydraulic system
or the tool
Replace the component
or have it repaired by
the manufacturer /
specialist vendor
Turn back the red cap
of the emergency stop
switch or press the
silicone cap on the
foot-operated switch to
release it again
See above
Insert or screw in the
coupling to the
limit stop
Clean the coupling and
insert or screw in to the
limit stop Replace the
component or have it
repaired by the
manufacturer /
specialist vendor
Replace the component
or have it repaired by
the manufacturer /
specialist vendor
Inspect the electrical
connection by a qualified
electrician and have it
repaired Replace the
component or have it
repaired by the manu-
facturer / specialist
vendor
27