YASKAWA GA700 Technical Manual page 324

6.10 Troubleshooting without Fault Display
Cause
There is faulty wiring in the control circuit terminals.
The settings for voltage input and current input of the
master frequency reference are incorrect.
Selection for the sinking/sourcing mode and the internal/
external power supply is incorrect.
The frequency reference is too low.
The multi-function analog input setting is incorrect.
was pressed.
The 2-wire sequence and 3-wire sequence are set
incorrectly.
324
• Wire the drive's control circuit terminals correctly.
• Check the input terminal status using U1-10 [Input Terminal Status].
Check the analog input terminal signal level settings.
• Terminal A1: DIP switch S1-1 and H3-01 [Terminal A1 Signal Level
Select]
• Terminal A2: DIP switch S1-2 and H3-09 [Terminal A2 Signal Level
Select]
• Terminal A3: DIP switch S1-3 and H3-05 [Terminal A3 Signal Level
Select]
• For sinking mode, short circuit terminals SC-SP using a wire jumper.
• For sourcing mode, short circuit terminals SC-SN using a wire jumper.
• In the case of an external power supply, remove the wire jumper.
• Check U1-01 [Freq Reference].
• Make the frequency reference higher than E1-09 [Minimum Output
Frequency].
• Check if the functions assigned to the analog input terminals being used
are correct. When H3-02, H3-10, H3-06 = 1 [MFAI Function Select =
Frequency Gain] has been set and voltage (current) is not input, the
frequency reference will be 0.
• Check if the analog input values assigned to terminals A1, A2, and A3
are appropriate using U1-13 to U1-15 [Terminal A1, A2, A3 Input
Voltage].
Turn off the Run command from external input, and then turn it on again.
Note:
If is pressed during operation, the drive will ramp to stop. The
function can be disabled by setting o2-02 = 0 [STOP Key
Function Selection = Disabled].
• Setting any of H1-03 to H1-08 [Terminals S3 to S8 Function Select] to 0
[3-Wire Sequence] enables the 3-wire sequence.
• If the drive is supposed to be set up for a 2-wire sequence, then ensure
H1-03 to H1-08 = 0 has not been set.
• If the drive is supposed to be set up for a 3-wire sequence, then one of
the parameters H1-03 to H1-08 must be set to 0.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Possible Solution