381333-395

Troubleshooting 3-3

Troubleshooting for MV ADTS

!DANGER

Refer to the Group 5 Controller User’s Guide 381333-126for ATS status display messages, time delays, pickup & dropout settings, & adjustments.

Hazardous voltage capable of causing shock, burns, or death is used in the switch. Do not touch the power or load terminal of the transfer switch!

Problem

Check in Numerical Sequence

 

1 Operation

2 Gen-Set

3 Voltage on

 

Display

 

 

 

 

 

Starting control must be in

 

Gen-Set does not start

Hold Transfer Test switch 15

the automatic position.

 

Batteries must be charged

 

when the Transfer

seconds or the outage must

and connected. Check

 

Control switch is turned

be long enough to allow for

wiring to engine starting

 

and held in Transfer Test

Feature 1C time delay plus

contacts on customer

 

position or when the

engine cranking and starting

terminal block TB. Verify on

 

normal source fails.

time.

the controller that small

 

 

 

plug J3 is connected to

 

 

 

receptacle P3.

 

 

 

 

Emergency

Transfer switch does not

 

Generator output circuit

voltage on

transfer the load to the

Wait for Feature 2B time

breaker must be closed.

controller display

emergency source after

Generator frequency must

should read at

delay to time out (if used).

the engine-generator set

be at least 95% of nominal

least 90% of

 

starts.

 

(57 Hz for a 60 Hz system.)

nominal phase to

 

 

 

phase voltage.

Transfer switch does not

 

 

Normal voltage on

transfer the load to normal

 

 

controller display

source when normal

Wait for Feature 3A time

 

should read at

returns or when the

delay to time out (if used).

 

least 90% of

Transfer Control switch is

 

 

nominal phase to

released.

 

 

phase voltage.

Engine-generator set does

 

 

 

not stop after load

Wait for Feature 2E time

Starting control must be in

 

retransfer to the normal

delay to time out (if used).

the automatic position.

 

source.

 

 

 

Load Disconnect Active

Wait for load disconnect time

Explanation: Transfer switch

in delayed-transition

transfer mode. Load disconnect time delay is

light comes on.

delay to time out.

adjustable from 0 to 5 min. 59 sec.

 

 

Load Disconnect Active

Check load disconnect time

Explanation: Transfer switch contacts are open

light stays on longer than 6

longer than 5 min. 59 sec (maximum setting).

delay setting. Call ASI.

min..

Load remains disconnected.

 

 

 

Circuit breaker trips (on an

Check the controller display for

error messages and determine the cause of the

trip. After the fault is cleared, turn the Breaker Control switch to CLOSE. Press

ATS without protective

the Alarm Reset button.

 

 

relay)

 

 

The CB should close.

 

 

 

 

 

 

Check the protective relay and determine the cause of the trip (refer to device’s

Circuit breaker trips (on an

instructions). After fault is cleared, reset the protective relay. Then reset the

ATS with a protective

Lock-Out Relay by turning it to RESET. Next turn the Breaker Control switch to

relay)

CLOSE. Press the Alarm Reset button.

 

 

The CB should close.

 

 

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Emerson 7000 manual Troubleshooting for MV Adts, Load Disconnect Active
Page 10 Page 12

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