Ditch Witch JT520, Operator'S Manual

Page: 92 / 151

JT520 Operator’s Manual
Systems and Equipment - 91
Electric Strike System
CMW
Strobe light on drilling unit
does not work during total
test Improper connections with
control module Check connections and wiring
harness
Defective strobe light 1. Disconnect strobe and connect to
external 12V power source.
2. If strobe does not work, replace it.
Defective control module Have control module checked or
replaced
Alarm on drilling unit does
not work during total test Improper connections with
control module Check connections and wiring
harness
Defective alarm 1. Disconnect strobe and connect to
external 12V power source.
2. If strobe does not work, replace it.
Defective control module Have control module checked or
replaced
Strobe light and alarm on
drilling unit do not work
during total test Improper connections with
control module Check connections and wiring
harness
Defective control module Have control module checked or
replaced
EC2 code displays and
current problem indicator is
on Improper connections with
control module Check cable connections on control
module and current transformer
Defective current transformer 1. Disconnect current transformer.
2. Check for 20-40 ohms from pin 1
to pin 4, 20-40 ohms from pin 1 to
pin 2, and less than 1 ohm from
pin 2 to pin 4.
Defective current transformer
cable 1. Disconnect cable from
transformer and control module.
2. Check continuity of cable.
3. If continuity is zero or cable is
damaged, replace.
Defective control module Have control module checked or
replaced
EV1 code displays and
voltage problem indicator is
on Improper connection of voltage
limiter to ground stake Check voltage limiter connection to
ground stake and verify that ground
stake is driven into the ground
Defective voltage limiter Have voltage limiter checked or
replaced
Defective control module Have control module checked or
replaced
Problem Possible cause Possible solution