YASKAWA iQpump1000 - Page 282

HOA Keypad Display Minor Fault Name
Terminal So (H1-0o = 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
rUn
Motor Switch during Run
A command to switch motors was entered during run.
Cause Possible Solution
A motor switch command was entered
during run.
Change the operation pattern so that the motor switch command is entered while the drive is stopped.
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.
Digital Operator Display Minor Fault Name
THo
<1>
Thermistor Disconnect
The thermistor used to detect motor temperature has become disconnected.
Cause Possible Solutions
The motor thermistor is not connected
properly.
Check the thermistor wiring.
<1> Detected in models 4A0930 and 4A1200.
HOA Keypad Display Minor Fault Name
TrPC
IGBT Maintenance Time (90%)
IGBTs have reached 90% of their expected performance life.
Cause Possible Solution
IGBTs have reached 90% of their expected
performance life.
Replace the drive.
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
Parameter settings are not appropriate for
the load
Check the settings of parameters L6-02 and L6-03.
There is a fault on the machine side Check the load for any problems.
HOA Keypad Display Minor Fault Name
UL4
Undertorque Detection 2
The current has fallen below the minimum value set for torque detection (L6-05) for longer than the allowable
time (L6-06).
5.3 Alarm Detection
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YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual