YASKAWA E7LVD002 Technical Manual page 176

Four inputs are excluded from this process, they do not cause any LEDs to blink. They have LEDs on the keypad that monitor
the status independently:
• Motor-Overload-Relay input at CN109/5
• User-Safety-Interlock input at TB1/1
• Drive-Fault-Relay input at CN102/2
• Drive-Run-Relay input at CN102/3
If testing of the Drive digital outputs is required, these two outputs can be set to a normally active function on the Drive key-
pad (H2-01 or H2-02 set to 1 (Zero Speed) or 6 (Ready) for example) in order to be monitored on the bypass H/O/A keypad.
Problem or Fault
Panel/Drive ON, Bypass dead.
Any or all the user digital I/O at TB1 are not
accepted.
Drive TB3/TB5 I/O not OK.
No motor-run in Hand mode.
Runs the motor at power up.
Blinks the LEDs and/or recycles relays/
outputs.
Drive reads no analog signal.
Shuts down the Drive and/or the motor by
itself and does not run anymore.
Powers up to Off mode.
All LEDs always lit.
Off mode locked and Auto or Hand mode not
working.
D56 (VKP_OK) LED is off, keypad is dead.
Does not go back to Drive mode when Drive
fault is reset.
Control Power LED blinks and motor
cannot run.
Switches to bypass mode by itself after Drive
run command. Drive will not run.
The options wired to CN104/1-3 are not
working.
The options wired to CN104/4-6 are not
working.
The motor select input at TB1-6 is not
working.
Stays in bypass mode and does not accept any
Drive command.
Drive analog outputs always at max, off or
very low.
Drive or Bypass begins to run when Auto is
pressed; with no contact closure at TB1-2.
Table 6.2 Troubleshooting the E7L
Check the fuse F101. Verify the power to PCB LEDs.
Test the user-side wiring/circuitry. If it is OK, test the control PCB. Check J1,
S2/7-8 and fuse F102. If external supply used, check the voltage levels. All
either 24VDC or all 120VAC, ±10% safe area, no mixing.
Test the Drive functions/wiring only.
Check S4-3 to be off. Maybe in Start/Stop Option mode.
Check S2-2 to be off. Check TB1-2 and S2-1.
Check S2-3 to be off. Maybe in Maintenance mode.
Check S1-2, S1-3 and S1-4. Check the Drive parameters (see Table 5.2).
Very noisy area or unstable power. If long wiring is present from customer
side, try setting J1 to position 2-3 and supply control power externally. Add
RC filters to TB1-1 through 6 and/or use shielded cables. Recycle the power.
Check S2-2 to be on and S4-4 to be off.
Check keypad wiring. Bad board and/or voltage.
If Power LED blinks, check keypad wiring and recycle the power. Replace the
H/O/A keypad and/or its cable.
Check the keypad cable and wiring. Replace the H/O/A keypad and/or its
cable.
Check S2-1 to be ON. Check the Drive and its wiring.
Bad keypad or unstable power. Recycle the power and check the keypad and
its connection. Replace H/O/A keypad.
Drive is not responding properly. Check the drive, cable and connections.
Recycle the power.
Check S4-3 to be ON. Check the fuse F102.
Check S4-1 to be ON. Check the fuse F102.
Check CN104/4 and 5 to both be inactivated. Check the fuse F102.
Check TB1-4 and 5 to be off. Check the Drive connections. Recycle the
power, bad PCB A2.
Check J2 and J3 jumpers are not missing and in right position (1-2 for I, 2-3
for V), check the H4 parameters.
Check programming of parameter H2-02. This parameter must be set to
"3B: Run Src Com/Opt" for all E7L units. See Table 5.1.
Diagnostic & Troubleshooting 6 - 4
Solution