Yaskawa iQpump Micro User Manual
Page 186
Digital Operator Display
Minor Fault Name
Low Water in Tank
(LWT)
Low Water in Tank
Cause
Possible Solution
The water level in the tank is too low.
Shown when P4-24 = 2 and when the digital
input has been active (closed for P4-21 = 0,
or open for P4-21 = 1) for the time set in
P4-22.
• Check pressure switch contact for correct operation.
• Check control wiring to drive terminal strip from pressure switch contact.
• Check to make sure that suction pressure is present by means of a separate measuring device.
• Raise the water level.
Digital Operator Display
Minor Fault Name
LT-1
Cooling Fan Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be replaced.
Note:
An alarm output (H2-oo = 10) will only be triggered if both (H2-oo = 2F and H2-oo =
10) are set.
Cause
Possible Solution
The cooling fan has reached 90% of its
expected performance life.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
Digital Operator Display
Minor Fault Name
LT-2
Capacitor Maintenance Time
The main circuit and control circuit capacitors are nearing the end of their expected performance life.
Note:
An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Cause
Possible Solution
The main circuit and control circuit
capacitors have reached 90% of their
expected performance lives.
Replace the drive.
Digital Operator Display
Minor Fault Name
LT-3
Soft Charge Bypass Relay Maintenance Time
The DC bus soft charge relay is nearing the end of its expected performance life.
Note:
An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Cause
Possible Solution
The DC bus soft charge relay has reached
90% of expected performance life.
Replace the drive.
Digital Operator Display
Minor Fault Name
LT-4
IGBT Maintenance Time (50%)
IGBTs have reached 50% of their expected performance life.
Note:
An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Cause
Possible Solution
IGBTs have reached 50% of their expected
performance life.
Check the load, carrier frequency, and output frequency.
Digital Operator Display
Minor Fault Name
NETSCAN
Waiting for Master
(NETSC)
NETSCAN
Drive is waiting for a message from the master.
Cause
Possible Solution
No message was received from the master
within the time set in P9-28.
• Increase the P9-26 setting to account for network latency.
• Verify that there is a drive on the network with parameter P1-01 set to 3 and P9-27 to 0.
• Check network connections and verify H5-01 and P9-25 settings for all drives on the network.
Digital Operator Display
Minor Fault Name
NMS
SetPoint Not Met
(NOTSP)
Not Maintaining Setpoint
The setpoint cannot be maintained and P1-17 is set to 1.
Cause
Possible Solution
5.3 Alarm Detection
186
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual