YASKAWA L1000H Quick Start Manual page 29

 Fine Adjustments
Problem
Elevator too slow when heavily
loaded.
Elevator too slow in case of
heated up oil.
Harsh starting and stopping.
Leveling time okay when running
with Nominal Speed (not over-
load case) but too long when run-
ning with slower speed.
Uncomfortable, harsh ending of
travel.
Uncomfortable, harsh begin of
travel in normal operation.
Energy Saving / Overload func-
tion is enabled but the drive lim-
its the speed to a value, lower
than the frequency shown in U7-
08.
Car speed is good for Nominal
Speed, but not for Intermediate or
Inspection Speed.
YASKAWA Europe TOEP C710606 91B AC Drive L1000H - Quick Start Guide
Possible Cause
Torque reference value too high because
elevator was not empty at teach run.
Drive is overloaded and settings for
Energy Saving/Overload function are
wrong.
Worn-out pump.
Incorrect temperature measurement.
Wrong temperature reference (p1-16),
too small temperature compensation gain
or worn-out pump.
Too short ramp times
Insufficient distance compensation
before deceleration.
Leveling Control might increase pump
speed too early.
Stop Dwell time too short.
Too short ramp times.
No leveling travel.
Insufficient Start Dwell.
Too high leakage frequency.
Too small start swell ramp (P6-01).
Too little C2-01 time.
Drive too heavy loaded for the given car
load.
Incorrect torque references.
5 Start Up
Corrective Action
• Repeat Empty Car Teach Run.
• Increase P8-02 value by 10% at a time.
• Set L3-01 = 1.
• Limit car load or select bigger drive.
Replace the pump.
• Check temperature sensor installation.
• Check if value for analogue input bias
(H3-04) is set correctly.
• Increase P8-01 value carefully.
Replace the pump.
• Increase C1 parameters carefully.
• Increase S curve times carefully.
Increase parameter P8-05 carefully in
steps of 0.01.
Increase parameter Leveling Recovery
Wait Time (P7-01).
Increase parameter P6-07.
Increase C1-04 slightly.
Change C1- and C2- parame-
ters or increase switch distance to reach
leveling speed.
Increase parameter Start Dwell Time
(P6-02).
Reduce leakage frequency at start dwell
by 10% to 20%.
Increase start dwell ramp 0.5 Hz at a
time.
Increase C2-01 time.
Limit car load or select a bigger drive.
Decrease values, set in P3-11 (for Inter-
mediate Speed) or P3-12 (for Inspection
Speed) in small steps.
EN 29