HOA Keypad Display
Fault Name
doH
Damping Resistor Overheat
The temperature of the built-in damping resistor exceeded the set value.
Cause
Possible Solution
• The capacity of the power supply is too
small.
• The distortion in the power supply is too
large.
• Increase the capacity of the power supply.
• Lower the impedance of the input power supply wiring.
A phase loss occurred in the input power
supply.
Check the input power supply for phase loss or an imbalance in the interphase voltages.
HOA Keypad Display
Fault Name
E5
SI-T3 Watchdog Timer Error
The watchdog timed out.
Cause
Possible Solution
Data has not been received from the PLC Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and
proceed to phase 3. Refer to the SI-T3 Option Technical Manual for more details on troubleshooting.
HOA Keypad Display
Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solution
An external fault was received from the
PLC and F6-03
≠
3.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Problem with the PLC program
Check the PLC program and correct problems.
HOA Keypad Display
Fault Name
EF1
Pump Fault (input terminal S1)
External fault at multi-function input terminal S1.
EF2
Pump Fault (input terminal S2)
External fault at multi-function input terminal S2.
EF3
Pump Fault (input terminal S3)
External fault at multi-function input terminal S3.
EF4
Pump Fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
Pump Fault (input terminal S5)
External fault at multi-function input terminal S5.
EF6
Pump Fault (input terminal S6)
External fault at multi-function input terminal S6.
EF7
Pump Fault (input terminal S7)
External fault at multi-function input terminal S7.
EF8
Pump Fault (input terminal S8)
External fault at multi-function input terminal S8.
Cause
Possible Solution
An external device tripped an alarm
function
Remove the cause of the external fault and reset the fault.
Wiring is incorrect
• Properly connect the signal lines to the terminals assigned for pump fault detection
(H1-
oo
= 20 to 2F).
• Reconnect the signal line.
Multi-function contact input setting is
incorrect
• Check for unused terminals set for H1-
oo
= 20 to 2F (Pump Fault).
• Change the terminal settings.
HOA Keypad Display
Fault Name
Err
EEPROM Write Error
Data cannot be written to the EEPROM
5.3 Fault Detection
184
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
