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SECTION 4.SECTION 4.

SECTION 4.

EXTERNAL DRIVE STEXTERNAL DRIVE ST

EXTERNAL DRIVE ST

TUSTUS

TUS

INDICAINDICA

INDICA

ORSORS

ORS

The external drive status LCD indicators appear on

the door mounted panel display to the left and below

the 3½ digit LCD display.

4.14.1

4.1

POWER ONPOWER ON

POWER ON indicates the 120 V AC control

power of the drive is energized.

4.24.2

4.2

READYREADY

READY indicates that the drive power-up se-

quence has been successfully completed. There are no

drive faults. This indicator will go out when the drive

is in the run mode.

4.34.3

4.3

RUNRUN

RUN indicates that the drive is in the run mode

and there are no drive faults.

4.44.4

4.4

@ indicates that the drive circuits have reached

and synchronized with the commanded speed refer-

ence signal. The AT SPEED indicator displays only

when speed synchronization is maintained.

NOTE: IF THE SPEED CONTROLNOTE: IF THE SPEED CONTROL

NOTE: IF THE SPEED CONTROL

SIGNAL IS UNSTABLE, SPEED OS-SIGNAL IS UNSTABLE, SPEED OS-

SIGNAL IS UNSTABLE, SPEED OS-

CILLATIONS (HUNTING) WILLCILLATIONS (HUNTING) WILL

CILLATIONS (HUNTING) WILL

CAUSE THIS LCD TO FLASH ONCAUSE THIS LCD TO FLASH ON

CAUSE THIS LCD TO FLASH ON

AND OFF.AND OFF.

AND OFF.

4.54.5

4.5

REVREV

REV indicates the internal drive switch which

determines motor rotation direction has been acti-

vated to REVERSE the direction of the motor’s rota-

tion. This indicator should not be displayed for single

direction applications.

CAUTION

FOR SINGLE DIRECTION APPLI-FOR SINGLE DIRECTION APPLI-

FOR SINGLE DIRECTION APPLI-

CATIONS, CUSTOMER WIRINGCATIONS, CUSTOMER WIRING

CATIONS, CUSTOMER WIRING

SHOULD BE CORRECTED ATSHOULD BE CORRECTED AT

SHOULD BE CORRECTED AT

START-UP IF ROTATION IS INCOR-START-UP IF ROTATION IS INCOR-

START-UP IF ROTATION IS INCOR-

RECT. USING THE REVERSERECT. USING THE REVERSE

RECT. USING THE REVERSE

SWITCH COULD CAUSE OPERA-SWITCH COULD CAUSE OPERA-

SWITCH COULD CAUSE OPERA-

TOR CONFUSION AND/OR EQUIP-TOR CONFUSION AND/OR EQUIP-

TOR CONFUSION AND/OR EQUIP-

MENT DAMAGE IF IMPROPERLYMENT DAMAGE IF IMPROPERLY

MENT DAMAGE IF IMPROPERLY

USED.USED.

USED.

4.64.6

4.6

FAULTFAULT

FAULT displays to indicate that a fault condi-

tion exists from the OL, PL, OC, UV, OV, GF or EXT

fault circuits.

4.74.7

4.7

OLOL

OL displays when the OVERLOAD circuit is ac-

tivated due to excessive current being drawn by the

motor.

Potential causes of this fault trip are:

1. Motor bound or not free to rotate.

Example: Brake on, bearing problems, etc.

2. Belts improperly tensioned or aligned.

3. Sheaves and/or shaft couplings improperly

aligned.

4. Maximum speed of the drive set too high.

5. Misapplication or undersized drive.

After eliminating the cause, reset an overload fault by

switching the drive to stop mode and then restarting.

An overload fault cannot be reset automatically or by

the optional fault switch.

4.84.8

4.8

PLPL

PL flashes on and off if the L1 input line phase is

low or missing. The PHASE LOSS LED should not be

visible if the voltage on L1 phase is within tolerance.

NOTE:NOTE:

NOTE:

IF PHASE L2 OR L3 IS LOW IF PHASE L2 OR L3 IS LOW

IF PHASE L2 OR L3 IS LOW

IN VOLTAGE OR MISSING, THE 120IN VOLTAGE OR MISSING, THE 120

IN VOLTAGE OR MISSING, THE 120

VAC CIRCUITS OF THE DRIVE AREVAC CIRCUITS OF THE DRIVE ARE

VAC CIRCUITS OF THE DRIVE ARE

DE-ENERGIZED AND THE DRIVEDE-ENERGIZED AND THE DRIVE

DE-ENERGIZED AND THE DRIVE

WILL SHUT DOWN. THE PL LEDWILL SHUT DOWN. THE PL LED

WILL SHUT DOWN. THE PL LED

DOES NOT DISPLAY FOR THESEDOES NOT DISPLAY FOR THESE

DOES NOT DISPLAY FOR THESE

CONDITIONS.CONDITIONS.

CONDITIONS.

See Section 7.2.5 for information on resetting this fault.

4.94.9

4.9

OTOT

OT displays if the internal thermostats of the

drive see an OVER TEMPERATURE. There are two

thermostat circuits.

Internal ambient 160

F (70

C) (max)

Heatsink 195

F (90

C) (max)

If this fault circuit activates, check to ensure:

1. All drive fans are functioning properly.

2. The air flow paths are not clogged or re-

stricted.

3. The ambient temperature outside of the enclo-

sure is not in excess of 104

F (40

C).

4. The clearances required in Section 1.1 of this

manual are as specified.

5. The drive is mounted vertically.

6. The filters, if supplied, are clean and clear.

This fault automatically resets when the drive cools

down.

4.104.10

4.10

OCOC

OC displays if the OVERCURRENT circuit is ac-

tivated. An OVERCURRENT trip indicates a short

circuit in the inverter section of the drive or in the

motor wiring, or the drive was subjected to a severe

surge of input or output current.

If this circuit trips check:

1. The motor and motor wiring for a short from

phase to phase or phase to ground.

2. The motor wiring for an intermittent/loose

Brand	Graham
Model	1703 Series
Category	DC Drives
Language	English

Graham 1703 Series User Manual

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Graham 1703 Series Specifications