504
YASKAWA
SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Code
Name
Causes
Possible Solutions
LOW_SUCT
Low Suction Detected
The bypass detected a Low Suction condition.
•
Check the digital input programmed for Low Suction Switch
(Z2-0x = 42).
•
Check the connected device for continuity.
•
Check Bypass Digital Input Invert Settings in Z2-09 to Z2-16.
Code
Name
Causes
Possible Solutions
LSP
Low Suction Pressure
An external input has indicated that an insufficient
suction pressure condition exists in these conditions:
•
Y4-24 = 1 [Low City Alarm Text = Low Suction
Pressure]
•
The terminal set for
H1-xx = B8 or 1B8 [MFDI
Function Selection = Low City Pressure or !Low
City Pressure]
activates
•
Examine the pressure switch contact for correct operation.
•
Make sure that control wiring to drive terminal strip from
pressure switch contact.
•
Make sure that suction pressure is present with an isolated
measuring device.
•
Increase the system pressure.
•
Set
Y4-22 [Low City On-Delay Time]
and
Y4-23 [Low City Off-
Delay Time]
correctly.
•
Deactivate the digital input terminals set to
H1-xx = B8 or 1B8
.
Note:
•
If the drive detects this error, the terminal set to
H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm]
will activate.
•
If the drive detects this error during run, it coasts to stop and does not operate until the digital input has deactivated for the time set in
Y4-22
.
Code
Name
Causes
Possible Solutions
LT-1
Cooling Fan Maintenance Time
The cooling fan is at 90% of its performance life
estimate.
1.
Replace the cooling fan.
2.
Set
o4-03 = 0 [Fan Operation Time Setting = 0 h]
to reset the
cooling fan operation time.
Note:
When the performance life estimate is expired, the terminal set to
H2-01 to H2-03 = 2F [MFDO Function Selection = Maintenance Notification]
will activate.
Code
Name
Causes
Possible Solutions
LT-2
Capacitor Maintenance Time
The capacitors for the main circuit and control circuit
are at 90% of their performance life estimate.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Note:
When the performance life estimate is expired, the terminal set to
H2-01 to H2-03 = 2F [MFDO Function Selection = Maintenance Notification]
will activate.
Code
Name
Causes
Possible Solutions
LT-3
SoftChargeBypassRelay MainteTime
The soft charge bypass relay is at 90% of its
performance life estimate.
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Note:
When the performance life estimate is expired, the terminal set to
H2-01 to H2-03 = 2F [MFDO Function Selection = Maintenance Notification]
will activate.
Code
Name
Causes
Possible Solutions
LT-4
IGBT Maintenance Time (50%)
The IGBT is at 50% of its performance life estimate.
Check the load, carrier frequency, and output frequency.
Note:
When the performance life estimate is expired, the terminal set to
H2-01 to H2-03 = 2F [MFDO Function Selection = Maintenance Notification]
will activate.
Code
Name
Causes
Possible Solutions
LWT
Low Water In Tank
An external input has indicated that the water level in
the tank is too low in these conditions:
•
Y4-24 = 2 [Low City Alarm Text = Low Water in
Tank]
•
The terminal set for
H1-xx = B8 or 1B8 [MFDI
Function Selection = Low City Pressure or !Low
City Pressure]
activates
•
Examine the pressure switch contact for correct operation.
•
Make sure that control wiring to drive terminal strip from
pressure switch contact.
•
Make sure that suction pressure is present with an isolated
measuring device.
•
Increase the water level.
•
Set
Y4-22 [Low City On-Delay Time]
and
Y4-23 [Low City Off-
Delay Time]
correctly.
•
Deactivate the digital input terminals set to
H1-xx = B8 or 1B8
.
Note:
•
If the drive detects this error, the terminal set to
H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm]
will activate.
•
If the drive detects this error during run, it coasts to stop and does not operate until the digital input has deactivated for the time set in
Y4-22
.
Code
Name
Causes
Possible Solutions
NMS
Setpoint Not Met
The feedback deviates from the setpoint at a level
more than
Y1-15 [Maximum Setpoint Difference]
for
the time set in
Y1-16 [Not Maintaining Setpoint
Time]
.
•
Examine for a blocked impeller, over cycling, or broken pipe.
•
Set
Y1-15
and
Y1-16
correctly.
Note:
•
If the drive detects this error, the terminal set to
H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm]
will activate.
•
If the drive detects this error, it will respond as specified by the setting of
Y1-17 [Not Maintaining Setpoint Sel]
.
Summary of Contents for H6B1A002
Page 12: ...12 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
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Page 454: ...5 14 Z Bypass Parameters 454 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
Page 590: ...8 6 Storage Guidelines 590 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
Page 780: ...11 3 European Standards 780 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
