HOA Keypad Display
Minor Fault Name
Chattering in the magnetic contactor (MC)
installed between the drive output
terminals and the motor.
Implement countermeasures so that chattering does not occur for the MC.
There is a phase loss or an imbalance in the
interphase voltages of the input power
supply.
Check the status of the input power supply and eliminate phase losses and imbalance.
HOA Keypad Display
Minor Fault Name
PoC
Pump Over Cycle
Cause
Possible Solution
The pump has exceeded the number of
cycles set in P2-10 in the time set in P2-11
and P2-12 is set to 1 (alarm).
• Set the Pump Over Cycle alarm characteristics in P2-10 and P2-11.
• Drive response to this condition is controlled by P2-12, Over Cycling Mode.
HOA Keypad Display
Minor Fault Name
R-DNE-S
o
Remote Drive Disable
Cause
Possible Solution
Terminal S
o
(H1-0
o
= 95) has been
closed for the time set in P4-26, Remote
Drive Disable On-Delay, when P4-25,
Remote Drive Disable Selection, was set to
0 (N.O.).
Remove conditions causing the terminal to close.
Terminal S
o
(H1-0
o
= 95) has been open
for the time set in P4-26, Remote Drive
Disable On-Delay, when P4-25, Remote
Drive Disable Selection, was set to 1
(N.C.).
Remove conditions causing the terminal to open.
HOA Keypad Display
Minor Fault Name
SE
MEMOBUS/Modbus Communication Test Mode Error
Note:
This alarm will not trigger a multi-function output terminal that is set for alarm output
(H2-
oo
= 10).
Cause
Possible Solution
A digital input set to 67H (MEMOBUS/
Modbus test) was closed while the drive
was running.
Stop the drive and run the test again.
HOA Keypad Display
Minor Fault Name
SPL
Suction Pressure Loss
Suction Pressure Loss
Wire-break detection for suction pressure.
Cause
Possible Solution
An analog input programmed for setting 23
“WaterLvl/Suction” has dropped below 3
mA or risen above 21 mA for longer than 1
second.
Repair pressure sensor or wiring.
HOA Keypad Display
Minor Fault Name
SrC
Phase Order Detection Fault
The phase rotation direction for the input power supply changed.
Cause
Possible Solution
An input power supply wiring terminal is
loose.
Investigate and correct the cause and reset the fault.
The fluctuation in the voltage of the input
power supply is too large.
HOA Keypad Display
Minor Fault Name
UL3
Undertorque Detection 1
The current has fallen below the minimum value set for torque detection (L6-02) for longer than the allowable
time (L6-03).
Cause
Possible Solution
5.4 Alarm Detection
210
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual