Hyd-Mech H10A - Troubleshooting the H10 A; Electrical Troubleshooting

3.9
PROBLEM PROBABLE CAUSE SOLUTION
1 Saw will not start at all 1.1 Emergency Stop switch not
reset
1.1 Pull out E-stop knob
1.3 Safety interlock switches not
closed
1.3 Check that both wheel door
latches are closed
1.4 Insufcient blade tension 1.4.1 Check that blade is not broken or
off blade wheels
Change or re-mount blade
1.4.2 Adjust band tension
1.5 Main disconnect switch turned
off (0)
1.5 Turn switch on (1)
Observe all Lock-out
procedures
1.6 Power fuse(s) 1FU1 - 3 blown 1.6 Check and replace
1.7 Hydraulic motor over-load
tripped
1.7 Reset overload
1.8 Control circuit fuse(s) 2FU1 - 2
blown
1.8 Check fuse, replace if necessary
2 Hydraulic pump motor starts, but
hydraulic functions do not repsond.
No pressure on gauge.
2.1 Wrong phase order from
electrical supply (blade will run
counter-clockwise)
2.1 Stop immediately.
Reverse any two phase
connections - qualied
personnel only
2.2 Inadequate oil in hydraulic tank 2.2 Check level gauge, add oil to
upper line
2.3 Pump malfuctiion or other cause 2.3 Contact dealer.
3 Hydraulic pump motor starts, but a
hydraulic function does not respond
to selector switch.
Pressure on gauge.
3.1 If LED on cord connector at
valve solenoid lights, but no
function:
Solenoid failure or valve stuck.
3.1 Interchange coils with other valve.
If fault follows coil, replace coil.
If fault stays with valve, replace
valve.
3.2 If LED on cord connector does
not light, but corresponding
LED at PLC output lights:
PLC output fuse blown.
3.2 Check and replace fuse.
5FU1 for vise functions
5FU2 for head functions
5FU3 for head functions
3.3 As 3.2, but fuses ok:
PLC output relay failure.
3.3 Replace PLC output module
3.4 If corresponding LED at PLC
output does not light:
Fault in PLC input circuit or PLC
internal fault
3.4 Check corresponding PLC input
LED:
If off, troubleshoot input circuit.
If on, replace PLC.
4 Hydraulics are active, but blade will
not start
4.1 Automatic 35 second delay after
E-stop shutdown.
4.1 Wait for end of delay, and retry.
4.2 Overload of variable frequency
drive.
4.2 Press and pull-out E-stop to reset
VFD. After 35 second delay,
restart blade.
4.3 Blade motor contactor overload
tripped.
4.3 Reset overload
Shaded actions to be performed only by
qualied service personnel.
TROBLESHOOTING THE H10A
ELECTRICAL PROBLEMS