EP Equipment EPT20-15ET, Service Manual

Page: 94 / 128

REV. 09/2016
ELECTRICAL SYSYTEM
8
83
8.8.5 Control Circuit Troubleshooting
Key Switch
-
-
-
Turn the key switch to "OFF", remove key;
pull out the battery plug and switch off the
power supply.
Check the ON/OFF normally-opened (NO)
terminal with a multimeter: with handwheel
at natural position, Terminal (2) and (3) not
conducted; toggle the handwheel, Terminal (2)
and (3) conducted.
Check the ON/OFF normally closed (NC)
terminal with a multimeter: with handwheel
at natural position, Terminal (1) and (3) con-
ducted; toggle the handwheel, Terminal (1)
and (3) not conducted.
Testing
-
Enter Monitor Menu to check the status of the
switch:
"Mode Input", press the switch, if the display
does not change, then it indicates the switch
or its circuit failure;
Speed Mode Switch Control Circuit
(Figure 10513)
Check if the circuit is broken by using a multi-
meter:
-
-
Set the multimeter to ON-OFF;
Check if #1/#24 circuit (circuit between switch
and controller) is conducted.