Injection Molding Machine Chapter 5
V3.0
5-6
Item Possible Causes Solution
1.12
Corepull failure
A Clamp open and close not in
position
B Mold stuck
C Hydraulic piping not conform to
actuation sequence
D Actuation conditions are not
satisfied.
E Improper setting of corepull
position， pressure， speed.
F Directional valve stuck
G Directional valve circuit failure
A Correct clamp open， close and corepull
position
B Check and repair mold
C Check and repair pipeline and operation
sequence
D Perform clamp open/close operation first
E Correct setting value
F Clean V31， V32 manually press spool
G Check and repair signal wires 181/0， 182/0
1.13
Temperature control abnormal
A Heater switch is not turned on
B Cold starting protection time in
action
C Temperature doesn’t reach the
range of setting value within –5
degree when starting machine first
time.
D Heater band failure
E Heater contactor M4 damaged
F Temperature in control box
indicates –17 degrees
G Temperature unstable
H Temperature board TMP LED light
not flicker
I Temperature keeping function is
on
J “LO” temperature too low
K “HI” temperature too high
L “ABN” heating circuit failure
M “DIS” thermocouple broken
N “INV” thermocouple polarity
wrongly connected.
A Turn heater switch on
B Wait for completion of time
C Wait for temperature rising or correct setting
value
D Check and repair heater band
E Check and replace contactor
F Poor connection of +20， C in signal transfer
board
G Check thermocouple wire or replace TMP
temperature board
H Check the power of switching power supply
+5VDC
I Turn off temperature keeping function
J Adjust and set temperature upper and lower
limits
K Adjust and set temperature upper and lower
limits
L Check SSR， fuse， terminal， circuit，
heater band， etc.
M Check or replace thermocouple
N Exchange thermocouple wire + ， -
connection
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