YASKAWA Z1000U Technical Manual page 224

6.5 Alarm Detection
HOA Keypad Display
doH
Cause
• The capacity of the power supply is too small.
• The distortion in the power supply is too large.
A phase loss occurred in the input power supply.
HOA Keypad Display
EF
Cause
Sequence error
HOA Keypad Display
EF0
Cause
An external fault was received from the PLC with
F6-03 set to 3, which allows the drive to continue
running after an external fault occurs
There is a problem with the PLC program
HOA Keypad Display
EF1
EF2
EF3
EF4
EF5
EF6
EF7
EF8
Cause
An external device has tripped an alarm function Remove the cause of the external fault and reset the multi-function input value.
Wiring is incorrect
Multi-function contact inputs are set incorrectly
HOA Keypad Display
FbH
Cause
224
Damping Resistor Overheat
The temperature of the built-in damping resistor exceeded the set value.
• Increase the capacity of the power supply.
• Lower the impedance of the input power supply wiring.
Check the input power supply for phase loss or an imbalance in the interphase voltages.
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
Option Card External Fault
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Check the PLC program and correct problems.
External Fault (Input Terminal S1)
External fault at multi-function input terminal S1.
External fault (input terminal S2)
External fault at multi-function input terminal S2.
External fault (input terminal S3)
External fault at multi-function input terminal S3.
External fault (input terminal S4)
External fault at multi-function input terminal S4.
External fault (input terminal S5)
External fault at multi-function input terminal S5.
External fault (input terminal S6)
External fault at multi-function input terminal S6.
External fault (input terminal S7)
External fault at multi-function input terminal S7.
External fault (input terminal S8)
External fault at multi-function input terminal S8.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault
detection (H1-oo = 24).
• Reconnect the signal line.
• Check if the unused terminals have been set for H1-oo = 24 (External Fault).
• Change the terminal settings.
Excessive PID Feedback
The PID feedback input is higher than the level set to b5-36 for longer than the time set to b5-37, and
b5-12 is set to 1 or 4.
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions