No. Name Description Range Def.
Control
Mode
Addr.
Hex
Pg.
V/
f
O
L
V
P
M
L8-03
Overheat Pre-Alarm
Operation Selection
Sets the drive operation when an overheat alarm oH is
detected.
0: Ramp to Stop using the active decel time.
1: Coast to Stop.
2: Fast-stop using the time set in C1-09.
3: Alarm Only. Drive continues running, but displays an
alarm.
4: Reduced Speed Operation. Drive continues to run with
reduced frequency reference as specified in L8-19.
Settings 0 through 2 trigger a fault relay if the heatsink
becomes too hot.
0 to 4 3 A A A 4AF 224
L8-05
Input Phase Loss Protection
Selection
Selects the detection of input current phase loss, power
supply voltage imbalance, or main circuit electrolytic
capacitor deterioration.
0: Disabled
1: Enabled
Note: This parameter is disabled in 200 V single-phase
drives.
0, 1
0
<19>
A A A 4B1 225
L8-07
Output Phase Loss
Protection Selection
Selects the output phase loss detection.
0: Disabled
1: Enabled (triggered by a single phase loss)
2: Enabled (triggered when two phases are lost)
Output phase loss is detected when operating with less than
5% of the drive rated current. Detection can mistakenly
occur if the motor is small relative to the drive capacity rating
(this parameter should be disabled in such cases).
0 to 2 0 A A A 4B3 226
L8-09
Output Ground Fault
Detection Selection
Selects the output ground fault detection.
0: Disabled
1: Enabled
0, 1
<3>
A A A 4B5 226
L8-10
Heatsink Cooling Fan
Operation Selection
Controls the heatsink cooling fan operation.
0: Run with timer (Fan operates only during run and for
L8-11 seconds after stop.)
1: Run always (Cooling fan operates whenever the drive is
powered up.)
0, 1 0 A A A 4B6 226
L8-11
Heatsink Cooling Fan
Operation Delay Time
This parameter sets the delay time for the cooling fan to shut
off after the run command is removed when L8-10 = 0.
0 to 300 60 s A A A 4B7 226
L8-12
Ambient Temperature
Setting
Used to input the ambient temperature. This value adjusts
the drives oL2 detection level.
-10 to 50 40 °C A A A 4B8 226
L8-15
oL2 Characteristics
Selection at Low Speeds
Sets the oL2 characteristics at output frequencies below 6
Hz.
0: No oL2 level reduction below 6 Hz.
1: oL2 level is reduced linearly below 6 Hz. It is halved at 0
Hz.
0, 1 1 A A A 4BB 226
L8-18
Soft Current Limit Selection
Selects the software current limit function. Typically no
adjustment is required.
0: Disabled
1: Enabled
0, 1
<15>
A A − 4BE 227
L8-19
Frequency Reduction Rate
during oH Pre-Alarm
Specifies the frequency reference reduction gain at overheat
pre-alarm when L8-03 = 4.
0.1 to 1.0 0.8 A A A 4BF 225
L8-29
Current Unbalance
Detection (LF2)
Selects the detection of unbalanced output currents caused
by faulty devices in the output circuit.
0: Disabled
1: Enabled
0, 1 1 − − A 4DF 227
L8-35
Installation Method
Selection
Selects the installation type:
1: Side-by-Side Mounting
2: NEMA Type 1 Drive
3: Finless Drive or External Heatsink Installation
0 to 3
<3>
<13>
<19>
Α Α A 4EC 227
L8-38
Carrier Frequency
Reduction
Provides protection to the IGBTs by reducing the carrier
frequency at low speeds.
0: Disabled
1: Enabled below 6 Hz
2: Enabled for the whole speed range
0 to 2
<3>
A A A 4EF 227
L8-40
Carrier Frequency
Reduction Time
Sets the time for that the drive continues running with
reduced carrier frequency after the carrier reduction
condition has gone (see also L8-38).
A setting of 0.00 s disables the carrier frequency reduction
time.
0.00 to
2.00
0.50 A A A 4F1 228
B.2 Parameter Table
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
363
B
Parameter List
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