Kb-electronics KBAC-48 Manual do Utilizador descarregar pdf (Página 23)

a fuse (Littelfuse 312/314, Buss ABC, or equivalent) or a circuit breaker in series with each ungrounded

conductor. Do not fuse motor leads. For the recommended fuse size, see Table 4 on page 10.

Wire the drive in accordance with the National Electrical Code requirements and other local codes that

may apply to the application.

12 DIAGNOSTIC LEDs

The drive contains two diagnostic LEDs mounted on the enclosure cover to display the drive’s

operational status.

12.1 Power On LED (PWR) – The “PWR” LED will illuminate green when the AC line is applied to the drive.

WARNING! Do not depend on the PWR LED as a guaranteed power o condition.

Be sure the main power switch or circuit breaker is in the “OFF” position before

servicing this drive.

12.2 Status LED (ST) – The “ST” LED is a tricolor LED which provides indication of a fault or abnormal

condition. The information provided can be used to diagnose an installation problem such as incor-

rect input voltage, overload condition, and drive output miswiring. It also provides a signal which

informs the user that all drive and microcontroller operating parameters are normal.

Table 7, summarizes the “ST” LED functions.

Table 7 – Drive Operating Condition and Status LED Indicator

Drive Operating Condition

Flash Rate

and LED Color

Normal Operation Slow Flash Green

Overload (120% – 160% Full Load)

Steady Red

t (Drive Timed Out)

Quick Flash Red

Short Circuit Slow Flash Red

Undervoltage

Quick Flash Red / Yellow

Overvoltage

Slow Flash Red / Yellow

Stop Steady Yellow

Stand-By

Slow Flash Yellow

Input Phase Loss

Rapid Flash Yellow

Notes: 1. Slow Flash = 1 second on and 1 second o. Quick Flash = 0.25 second on and 0.25 second o. 2. When the Overload is removed, before

the I

t times out and trips the drive, the “ST” LED will ash green. 3. When the Undervoltage or Overvoltage condition is corrected, the “ST” LED

will ash Red / Yellow / Green. 4. Only if the Forward-Stop-Reverse Switch is installed. 5. Model KBAC-29, with three-Phase AC line input, and

Models KBAC-45, 48. Rapid Flash = 4 mSec on and 6 mSec o.

13 TRIMPOT ADJUSTMENTS

The drive contains trimpots which are factory set for most applications. See Figure 2 on page 9 for the

location of the trimpots and their approximate factory calibrated positions. Some applications may

require readjustment of the trimpots in order to tailor the drive for a specic requirement. The trimpots

may be readjusted as described below.

WARNING! If possible, do not adjust trimpots with the main power applied. If adjust-

ments are made with the main power applied, an insulated adjustment tool must be

usedandsafetyglassesmustbeworn.Highvoltageexistsinthisdrive.Fireand/orelectrocution

canresultifcautionisnotexercised.TheSafetyWarningonpage5mustbereadandunderstood

before proceeding.

(Shown Factory Set to 0% Frequency Setting)

MIN

15 35

Figure 30 – Minimum Speed

Trimpot Range

(Shown Factory Set to 100% Frequency Setting)

MAX

110

75 90

100

Figure 31 – Maximum Speed

Trimpot Range

0.3

(Shown Factory Set to 1.5 Seconds)

ACCEL

1.5

Figure 32 – Acceleration

Trimpot Range

1 2 ... 18 19 20 21 22 23 24 25 26 27 28

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