AF9ZP0BA - EPS-ACW REACH TRUCK - User Manual
Page - 57/90
14 TROUBLESHOOTING
Below a Troubleshooting structure is composed with 5 status (readings of the
TESTER menu) and 2 selfchecking routines to carry out on demand real time
information of the state of the components of the system. In particular;
STATUS#1:
selfcheck of the motor and power drives.
STATUS#2:
selfcheck of the encoder and transmission.
STATUS#3:
selfcheck available (NOT DONE).
STATUS#4:
selfcheck available (NOT DONE).
STATUS#5:
measure of the insulation between motor phases and battery.
14.1 STATUS #1: selfcheck of the Motor and of the Power Drives
Reading STATUS #1 carries out a voltametering measure of the the motor
resistances between phase V and W (Rvw) and between phase W and U (Rwu) in
milliohms. To run this selfcheching routine, enter the HARDWARE SETTING menu
and set SELFCHK STATUS to LEVEL 1 and recycle the key. An alarm
SELFCHECK #1 occurs and a ID RMS MAX x SQRT(3/2) (i.e. 12*SQRT(3/2) =
14.7Adc @ Vbatt=48V) current will be injected in the motor and the motor
resistances measured. STATUS #1 in the TESTER menu, shows real time four
values in time sharing:
1
ST
VALUE:
long duration value (about 2secs): it toggles between values 2 and 3.
Value 2 means current injection involves terminals V and W. Value 3 means
current injection involves terminals U and W.
2
ND
VALUE:
first short duration value (about 500msec): this is the current injected
from the 1
st
terminal and exiting from the 2
nd
terminal.
3
RD
VALUE:
second short duration value (about 500msec): this is the current
injected from the 2
nd
terminal and exiting from the 1
st
terminal.
4
TH
VALUE:
third short duration value (about 500msecs): this is the motor
resistance measured between 1
st
terminal and 2
nd
terminal
TROUBLESHOOTING with STATUS #1:
1ST VALUE is expected to toggle between 2 (injection between terminals V and
W) and 3 (injection between terminals W and U)
2ND VALUE is expected to be 14 or 15 (amperes)
3
RD
VALUE is expected to be -14 or -15 (amperes)
4TH VALUE is expected in a window from 180 (milliohms) and 380 (milliohms)
(This is the resistance measured between two motor terminals and it changes a lot
with the motor temperature). Readings of the motor terminal between V-W and W-
U are expected to be close in between
Example of a correct sequence:
1.
1
ST
VALUE:
2. Injection involves V and W
.
2.
2
ST
VALUE:
14 or 15 => [Adc] current from V to W.
Zapi DUT reports 14.
3.
3
ST
VALUE:
-14 or -15 => [Adc] current from W to V.
Zapi DUT reports -14.
4.
4
ST
VALUE:
180 to 380 => [milliohms] resistance between V and W.
Zapi DUT reports 280.
5.
1
ST
VALUE:
3. Injection involves W and U
.
