Yaskawa Z1000 AC Drive HVAC - Manual (Page 229)

Cause Possible Solutions
The wrong password was entered.
• If the password entered to A1-04 does not match the password saved to A1-05, then drive
settings cannot be changed.
• Reset the password.
If you cannot remember the password:
•
Scroll to A1-04. Press
OFF
and simultaneously. Parameter A1-05 will appear.
• Set a new password to parameter A1-05.
Undervoltage was detected.
• Check the drive input power voltage by looking at the DC bus voltage (U1-07).
• Check all main circuit wiring.
u Motor Does Not Rotate Properly after Pressing AUTO Button or after Entering External
Run Command
n Motor Does Not Rotate
Cause Possible Solutions
The drive is not in the Drive Mode.
• Check if the DRV light on the HOA keypad is lit.
• Enter the Drive Mode to begin operating the motor.
Refer to The Drive, Programming, and Clock Adjustment
Modes on page 106 .
HAND was pressed.
Stop the drive and check if the correct frequency reference source is selected. If the operator keypad shall be the
source, the HAND button LED must be on. If the source is REMOTE, it must be off.
Take the following steps to solve the problem:
•
Press HAND .
Auto-Tuning has just completed.
• When Auto-Tuning completes, the drive is switched back to the Programming Mode. The Run command will
not be accepted unless the drive is in the Drive Mode.
• Use the HOA keypad to enter the Drive Mode. Refer to The Drive, Programming, and Clock Adjustment
Modes on page 106 .
A Fast Stop was executed and has
not yet been reset.
Reset the Fast Stop command.
Settings are incorrect for the source
that provides the Run command.
Check parameter b1-02 (Run Command Selection).
Set b1-02 so that it corresponds with the correct Run command source.
0: HOA keypad
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
There is faulty wiring in the control
circuit terminals.
• Check the wiring for the control terminal.
• Correct wiring mistakes.
• Check the input terminal status monitor (U1-10).
The drive has been set to accept the
frequency reference from the
incorrect source.
Check parameter b1-01 (Frequency Reference Selection 1).
Set b1-01 to the correct source of the frequency reference.
0: HOA keypad
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
The terminal set to accept the main
speed reference is set to the incorrect
voltage and/or current.
If the frequency reference is set at terminal A1, check parameter H3-01 for the correct signal level selection. If
terminal A2 is used, check parameter H3-09. Refer to Input Signal Selection for Terminals A1 and A2 on page
93 .
Selection for the sink/source mode
and the internal/external power
supply is incorrect.
Check wire jumper connection between terminals SC and SP. Refer to Sinking/Sourcing Mode for Digital
Inputs on page 92 .
Frequency reference is too low.
• Check the frequency reference monitor (U1-01).
• Increase the frequency by changing the maximum output frequency (E1-09).
Multi-function analog input is set up
to accept gain for the frequency
reference, but no voltage (current)
has been provided.
• Check the multi-function analog input settings.
• Check if analog inputs A1 or A2 are set for frequency reference gain (H3-02, H3-10 = 1). If so, check if the
correct signal is applied to the terminal. The gain and the frequency reference will be 0 if no signal is applied to
the gain input.
• Check if H3-02 and H3-10 have been set to the proper values.
• Check if the analog input value has been set properly. (U1-13 and U1-14)
5.10 Troubleshooting without Fault Display
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 229
5
Troubleshooting