Yaskawa iQpump Micro User Manual
Page 190
Digital Operator Display
Minor Fault Name
TdE
Time Data Error
Cause
Possible Solution
An error has occurred in the Real-Clock
Time function of the HOA keypad.
Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your nearest
sales representative.
Digital Operator 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.
Digital Operator 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.
Digital Operator 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).
Cause
Possible Solution
Parameter settings are not appropriate for
the load
Check L6-05 and L6-06 settings
There is a fault on the machine side
Check the load for any problems.
Digital Operator Display
Minor Fault Name
UL6
Underload Det 6
Motor Underload
The load has fallen below the underload curve defined in L6-14.
Cause
Possible Solution
The output current has fallen below the
motor underload curve defined in L6-14 for
longer than the time set to L6-03
Adjust the value set to L6-14 so that output current remains above the motor underload curve during normal
operation.
Digital Operator Display
Minor Fault Name
Uv
Undervoltage
One of the following conditions was true when the drive was stopped and a Run command was entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the drive was opened.
• Low control drive input power voltage. This alarm outputs if L2-01
≠0 and DC bus voltage < L2-05.
Cause
Possible Solution
Phase loss in the drive input power.
Check for wiring errors in the main circuit drive input power. Correct the wiring.
Loose wiring in the drive input power
terminals.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified.
Refer to Wire Gauges and Tightening
There is a problem with the drive input
power voltage.
• Check the voltage.
• Lower the voltage of the drive input power so that it is within the limits listed in the specifications.
Drive internal circuitry is worn.
• Check the maintenance time for the capacitors (U4-05).
• Replace the drive if U4-05 exceeds 90%.
The drive input power transformer is too
small and voltage drops when the power is
switched on.
• Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.
• Check the capacity of the drive input power transformer.
Air inside the drive is too hot.
Check the temperature inside the drive.
5.3 Alarm Detection
190
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual