Hafco EB-270DSA, Instruction Manual

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11 TROUBLESHOOTING
This chapter lists the probable faults and malfunctions that could occur while the machine is being used and
suggests possible remedies for solving them.
The first paragraph provides diagnosis for TOOLS and CUTS the second for ELECTRICAL COMPONENTS.
11.1 - Electrical components diagnosis
FAULT PROBABLE CAUSE REMEDY
1. No Power Blown fuse If a fuse is blown, check the related components for an
over-load or short-circuit.
A. No operation on three-phase Check the power supply and fuses No. FU4, FU5, FU6
for normal condition.
B. No DC24V (The white
indicator light is failed on the
panel)
a. Check the transformer’s inputs FU1 and
FU2(1A/1.6A) for normal condition.
b. Check fuse FU1(1A) on PCB1 for normal
condition.
C. No DC5V (The rest of
indicator lights are failed.) l
a. Check the transformer’s inputs FU1 and FU2(1A)
for normal condition.
b. Check fuse FU2(1A) on PCB1 for normal
condition.
D. No AC24V power a. Check the transformer’s inputs FU1 and FU2(1A)
for normal condition.
b. Check fuse FU3(4A) on the distributor board for
normal condition.
c. Check the connection points of the safety limit
switches at their locations on the machine for
normal condition
-refer to the wire diagram No: WT/M3/C-01,
connection wire No. 4, 5, 6, 7, 8, 19, and 20.
2. Hydraulic pump Failure a. Check on hydraulic motor M1, and see if it works.
b. Check the pump for normal condition.
c. Check AC contactor K1 for normal condition or
over-load (FS1).
d. Check the distributor board for voltage flow to Coil
K1(Wire No. 9 and 15).
Pump works but low pressure a. Check the hydraulic motor M1 wiring for correct
three phase connections.
b. Check the hydraulic flow for normal condition-
without staleness, shortage, or leaking.
3. Saw bow No operation a. Check the hydraulic pump.
b. Check the hydraulic flow for normal condition.
c. Check the distributor board for voltage flow to Coil
K1(Wire No. 9 and 15).
d. Check the signal of the hydraulic magnetic valve
for normal condition ( Bow up wire No. 9 and 21;
bow down wire No. 9 and 17.)
4. Vise (Front, back) No operation a. Check the hydraulic pump.
b. Check the hydraulic flow for normal condition.
c. Check the control panel for voltage flow to Coil
K1(Wire No. 9 and 15).
d. Check the signal of the hydraulic magnetic valve
for normal condition ( Vise close wire No. 9 and
31; vise open wire No. 9 and 35.)
16 Instruction Manual for EB-270DSA (B066) 31/03/2016