Product Manual

Table Of Contents

5 Transfer Switch Service

5.1 Introduction

This section covers the removal and replacement procedures for transfer switch components.

NOTICE

For servicing purposes, each transfer switch mechanism is removed and replaced as a single

component; there are no serviceable sub-components.

5.2 Switch Removal and Replacement Procedure

5.2.1 Disconnect AC Power

WARNING

The transfer switch is a shock hazard that can cause severe personal injury or death unless all

AC power is removed. Disconnect all sources of AC power to the transfer switch before

servicing.

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

Accidental starting of the generator set can cause severe personal injury or death due to

electrocution or contact with moving parts. Disconnect the starting battery cables before

performing service. Remove the negative (-) cable(s) first to reduce the risk of arcing.

WARNING

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

before removing battery cables. Disconnect the starting battery cables before performing

service. Remove the negative (-) cable(s) first to reduce the risk of arcing.

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

a. Press the stop button on the local display located 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. Open and lock out the generator set AC circuit breaker. The generator set main breaker has a

lockout mechanism built in between the handles on the breaker.