Product Manual

Table Of Contents

5. Transfer Switch Service7-2019

WARNING

Ignition of explosive battery gases can cause severe personal injury. Do not smoke or

cause any spark, arc, or flame while servicing batteries.

WARNING

Batteries emit hydrogen, a highly explosive gas. Thoroughly ventilate the battery

compartment before connecting battery cables. Connect the negative (-) cable (s) first to

reduce the risk of arcing.

3. Reconnect utility power (Normal).

4. Reconnect generator set power (Emergency).

5. Enable Remote and Standby using the local display mounted on the generator set.

6. Test system operation by turning off the utility feeder breaker.

7. Make sure the generator set starts and the switch transfers.

8. Turn the utility feeder breaker back on.

9. Make sure the switch transfers back to utility and the generator set shuts off.

5.3 Control Relay (K1) Replacement Procedure

WARNING

The transfer switch presents a shock hazard that can cause severe personal injury or death.

Before beginning installation, remove all sources of AC power. If a generator set provides

emergency power, press the generator set stop button, disconnect AC line power, disconnect the

battery charger from its AC power source, and disconnect the starting battery (negative [-] lead

first).

1. Remove all sources of power from the transfer switch in the following order.

a. Press the stop button on the generator set.

CAUTION

Always disconnect a battery charger from its AC source before disconnecting the

battery cables. Otherwise, disconnecting the cables can result in voltage spikes high

enough to damage the DC control circuits.

b. If there is an external battery charger, disconnect the battery charger from its AC power source.

WARNING

Ignition of explosive battery gases can cause severe personal injury. Do not smoke or

cause any spark, arc, or flame while servicing batteries.