YASKAWA L1000H - Fine Adjustments

6 Fine Adjustments
YASKAWA Europe TOEP C710616 92D AC Drive L1000H Quick Start Guide 30
6 Fine Adjustments
This section provides tips for improving the ride quality after the basic setup is complete and lists solutions to potential
problems. Refer to the Technical Manual for detailed description.
 Potential Problems and Solutions
For detailed information on pumps and valves, please refer to Blain Documentation.
Problem Possible Cause Corrective Action
Elevator too slow when heavily loaded.
Torque reference value too high because
elevator was not empty at teach run.
• Repeat Empty Car Teach Run.
• Increase P8-02 value by 10% at a time.
Drive is overloaded and settings for Energy
Saving/Overload function are wrong.
• Set L3-01 = 1.
• Limit car load or select bigger drive.
Worn-out pump. Replace the pump.
Elevator too slow in case of heated up oil.
Incorrect temperature measurement.
• Check temperature sensor installation.
• Check if value for analogue input bias (H3-04) is set
correctly.
• Increase P8-01 value carefully.
Wrong temperature reference (p1-16), too
small temperature compensation gain or
worn-out pump.
Replace the pump.
Harsh starting and stopping. Too short ramp times
• Increase C1 parameters carefully.
• Increase S curve times carefully.
Leveling time okay when running with
Nominal Speed (not overload case) but too
long when running with slower speed.
Insufficient distance compensation before
deceleration.
Increase parameter P8-05 carefully in steps of 0.01.
Uncomfortable, harsh ending of travel.
Leveling Control might increase pump
speed too early.
Increase parameter Leveling Recovery Wait Time
(P7-01).
Stop Dwell time too short. Increase parameter P6-07.
Too short ramp times. Increase C1-04 slightly.
No leveling travel.
Change C1- and C2- parameters or increase
switch distance to reach leveling speed.
Uncomfortable, harsh begin of travel in
normal operation.
Insufficient Start Dwell. Increase parameter Start Dwell Time (P6-02).
Too high leakage frequency.
Reduce leakage frequency at start dwell by 10% to
20%.
Too small start swell ramp (P6-01). Increase start dwell ramp 0.5 Hz at a time.
Too little C2-01 time. Increase C2-01 time.
Energy Saving / Overload function is
enabled but the drive limits the speed to a
value, lower than the frequency shown in
U7-08.
Drive too heavy loaded for the given car
load.
Limit car load or select a bigger drive.
Car speed is good for Nominal Speed, but
not for Intermediate or Inspection Speed.
Incorrect torque references.
Decrease values, set in P3-11 (for Intermediate Speed)
or P3-12 (for Inspection Speed) in small steps.
Problem Possible Cause Corrective Action
Up Direction Travel
Elevator too slow then heavily
loaded
Torque reference value is too high (incorrect
empty car teach run)
Repeat Empty Car Teach Run
Increase P8-02 value by 10% at a time
Drive is overloaded and settings for overload
function is incorrect
Set L3-01 = 1
Limit car load or select bigger drive
Worn-out pump Replace the pump
Elevator too slow with
increased oil temperature
Incorrect temperature measurement
Check temperature sensor & converter installation
Make sure temperature converter has power (12 to 35 V DC)
Make sure temperature sensor dipped in oil
Check if value for analogue input bias (H3-04) is set correctly
Increase P8-01 value by 10% at a time
Wrong temperature reference (P3-16)
Check temperature reference (P3-16) and compare with the actual
(U7-02)
Worn-out pump Replace the pump
Harsh starting and stopping Too short ramp times
Increase C1 parameters
Increase S-curve times