EP Equipment CQD16, Service Manual

Page: 81 / 251

67
REV. 07/2016
OPERATING SYSTEM
6
6.8 Emergency Switch
Emergency switch is used for emergency cut-off
of the power supply to all the control circuits.
6.8.1 Removal and Installation
See Section 6.2 .
6.8.2 Faults and Causes
1
Fault
Emergency switch at pulled-out
status, the vehicle not energized
Cause
a. Emergency switch failure;
b. Emergency switch circuit not
conducted.
2
Fault
Emergency switch pressed, the
vehicle still energized
Cause
a. Emergency switch failure;
b. Emergency switch shorted
(short circuit)
Checking
- Check if the appearance of emergency switch
its wiring harness are in good condition, and
if the connectors are connected securely.
6.8.3 Checking and Testing
Testing
-
-
Check if the emergency switch circuit is con-
ducted;
Carry out ON/OFF test to emergency switch
with a multimeter:
Emergency switch in pulled-out status, circuit
conducted;
press the emergency switch, the circuit is
opened.
6.8.4 Control Circuit Troubleshooting
Emergency Switch Control Circuit
(Figure 90311)
Check if the circuit is broken by using a multi-
meter:
-
- Set the multimeter to ON-OFF;
Check if #B2/#C1 circuit is conducted.
Fuse 10A
Emergency Switch