ELECTRICAL
Event Code 202
228
M4.8-1055-018
03 Rev. 10/09
Event Code 202
Motor voltage output Low (AC Hydraulic units
only).
Step 1: Check voltage at hydraulic motor power cable
connections, with keyswitch ON and P contactor pulled
in. Use BNEG on ACCESS 2 as reference.
• If: Less than 15 Vdc.
– Then proceed to Step 2.
• If: Greater than 20 Vdc.
– Then proceed to Step 3.
• If: 15 to 20 Vdc.
– Then proceed to Step 4.
Step 2: Verify BNEG is present at ACCESS 2 power
connection by moving positive meter lead to +BV at
battery.
• If: 35 to 38 Vdc.
– Then proceed to Step 3.
• If: 0 Vdc.
– Then issue exists in BNEG power circuit. Re-
pair as necessary.
Step 3: Check voltage at hydraulic motor output (U, V
& W) on ACCESS 2 with key on. Use BNEG on AC-
CESS 2 as reference.
• If: Less than 15 Vdc.
– Then follow Event 201 procedures.
• If: Greater than 20 Vdc.
– Then replace ACCESS 2.
• If: 15 to 20 Vdc.
– Then proceed to Step 4.
Step 4: Verify power cables are connected correctly
between motor and ACCESS 2 module.
• If: Cables connected correctly.
– Then proceed to Step 5.
• If: Cables incorrectly connected.
– Then repair/replace as necessary.
Step 5: Check for open hydraulic motor. Remove
power cables from motor, measure and record resis-
tance across each of the following phases (U to V), (U
to W), (V to W).
• If: Open.
– Then replace motor.
• If: Greater than 1 ohm resistance.
– Then replace the motor.
• If: Less than 1 ohm resistance.
– Then replace ACCESS 2.
Event Code 202
Hydraulic motor voltage output low (DC Hydraulic
units only).
Step 1: If problem occurs at start up, P contactor will
not close. Remove A or D cable to motor and verify
continuity through motor, good connection to BV+, and
greater than 10,000 ohms to truck chassis.
If problem occurs after P contactor closes, proceed to
Step 4.
• If: Continuity incorrect.
– Repair/replace wiring, connections or motor.
• If: Continuity correct.
– Then proceed to Step 2.
Figure 15995
Crown 2007 PF15665-18 Rev. 10/09
To Next Page
Loading...