Operating instruction and technical description
BA EV tester type 2 - 2.0
©
Walther-Werke Ferdinand Walther GmbH
page 8 of 10
By additionally operating switch C (now then B and C) the electric vehicle requests charging current and it is
switched on by the charging device. Please note that no charging power is withdrawn. The electric vehicle
simulated by the EV tester would be charged now (PWM signal: 6 V) and the LEDs L1, L2 and L3 should be
lit now.
By operating switch D instead of C (now then B and D) the electric vehicle requests an additional ventilation
during the charging process (PWM signal: 3 V). Thereby the charging device has to react accordingly. LED
L1, L2, L3 are still lit.
Frequency and pulse width of the PWM signal stay constant during the simulation.
4.6 Measuring of PWM signal (CP test jack)
On the BNC female jack there is the PWM signal available. It can for example be evaluated with an oscillo-
scope (scope).
Attention:
The measurement has to be carried out "unearthed, without PE". Otherwise, checking the PE
connection is not possible.
5 Troubleshooting
Error, fault
Cause
Remedy
EV tester does not
react
Voltage supply of charging
device is missing.
Plug is not inserted corrected.
Check voltage supply.
Check connector.
Check pre-fuses.
L1, L2 or L3 are not
shining
Voltage supply of charging de-
vice is missing.
Plug is not inserted correctly.
LED is defective.
Check voltage supply.
Check connector.
Check LED.
The oscilloscope con-
nected to the BNC fe-
male jack delivers no
signal
BNC plug is not inserted
correctly
Switch positions are wrong
Check switch positions communication status EV
(CP connection) B,C,D
Check switch position PE.
Check BNC plug.
