Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 236)

HOA Keypad Display Fault Name
The option card is not properly connected to the
drive
• The connector pins on the option card do not line up properly with the connector pins on the drive.
• Reinstall the option card.
HOA Keypad Display Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received for the CE detection time set to H5-09.
Cause Possible Solution
Faulty communications wiring or an existing short
circuit
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
Communication data error occurred due to noise
• Check the various options available to minimize the effects of noise.
• Counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or
the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors
if required.
• Separate all communication wiring from drive power lines.
HOA Keypad Display Fault Name
CoF Current Offset Fault
Cause Possible Solution
The drive tried to adjust the current offset value
beyond the allowable range. This is due to residual
induction current in the motor (e.g., during sudden
deceleration or when coasting) when the drive
attempted to start the motor.
• Create a motor restart sequence that allows enough time for residual induction voltage to dissipate.
• Enable Speed Search at start (b3-01 = 1). Use the multi-function terminals to execute External
Speed Search 1 and 2 (H1-oo = 61 or 62).
The current sensor in the drive is damaged
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
HOA Keypad Display Fault Name
CPF00 to CPF03, CPF07, CPF08, CPF11 to
CPF14, CPF16 to CPF24
CPF26 to CPF35
CPF40 to CPF45
Control Circuit Error
Cause Possible Solution
Hardware is damaged.
• Cycle power to the drive.
• If the problem continues, replace either the bypass control board or the entire drive. For instructions
on replacing the control board, contact Yaskawa or your nearest sales representative.
Connector on the operator is damaged. Replace the operator.
HOA Keypad Display Fault Name
CPF06
EEPROM Memory Data Error
Error in the data saved to EEPROM
Cause Possible Solution
There is an error in EEPROM control circuit
• Turn off the power and check the connection between the control board and the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
The power supply was switched off while
parameters were being saved to the drive
Reinitialize the drive using parameter A1-03.
HOA Keypad Display Fault Name
CPF25 Terminal Board Not Connected
Cause Possible Solution
Terminal board is not connected correctly Reconnect the terminal board to the connector on the drive, then cycle the power to the drive.
HOA Keypad Display Fault Name
doH
Damping Resistor Overheat
The temperature of the built-in damping resistor exceeded the set value.
6.4 Fault Detection
236 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual