Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty - Manual (Page 119)

Troubleshooting the Drive 5-5
Drive OL
Level 2 ➀ The calculated IGBT temperature requires a reduction in Current Limit.
If Drive OL Mode (150) is disabled and the load is not reduced, an
overload fault will eventually occur.
Flux
Amps Ref
Rang ➁ Result of autotune procedure (61).
IntDBRes
OvrHeat ➀ The drive has temporarily disabled the dynamic braking regulator
because the resistor temperature has exceeded a predetermined
value.
IR Volts
Range ➁ The drive autotuning default is Calculate and the value calculated for IR
Drop Volts is not in the range of acceptable values. This alarm should
clear when all motor nameplate data is properly entered.
MaxFreq
Conflict ➁ The sum of Maximum Speed (82) and Overspeed Limit (83) exceeds
Maximum Freq (55). Raise Maximum Freq (55) or lower Maximum
Speed (82) and/or Overspeed Limit (83) so that the sum is less than or
equal to Maximum Freq (55).
Motor
Type Cflct ➁ Motor Type (90) has been set to Sync Prm Mag or Sync Reluc, and one
or more DC functions (for example, DC Boost, DC Brake, etc.) have
been activated. DC injection functions are imcompatible with
synchronous motors and may demagnetize them.
NP Hz
Conflict ➁ Fan/pump mode is selected in Torq Perf Mode (53), and the ratio of
Motor NP Hertz (43) to Maximum Freq (55) is greater than 26.
Power
Loss ➀ Drive has sensed a power line loss.
Prechrg
Actv ➀ Drive is in the initial DC bus precharge state.
Speed
Ref Cflct ➁ Speed Ref x Sel or PI Reference Sel is set to “Reserved”.
Under-
Voltage ➀ The bus voltage has dropped below a predetermined value.
VHz Neg
Slope ➁ Custom V/Hz mode has been selected in Torq Perf Mode (53) and the
V/Hz slope is negative.
Table 5.4 – Alarm Names Cross-Referenced by Alarm Numbers
No.
1
1 Alarm numbers not listed are reserved for future use.
Alarm No.
1
Alarm
1 Precharge Active 20 Bipolar Conflict
2 UnderVoltage 21 Motor Type Conflict
3 Power Loss 22 NP Hz Conflict
5 Analog In Loss 23 MaxFreq Conflict
6 IntDBRes OvrHeat 24 VHz Neg Slope
8 Drive OL Level 1 25 IR Volts Range
9 Drive OL Level 2 26 FluxAmps Ref Rang
17 Dig In ConflictA 27 Speed Ref Cflct
18 Dig In ConflictB 30 DigIn Bad Value
19 Dig In ConflictC
Table 5.3 – Alarm Descriptions (Continued)
Alarm
Ty
p
e
Description