Honeywell hw400 service manual Electrical Diagnostics HW3000/L Models

ELECTRICAL DIAGNOSTICS (HW3000/L MODELS)

8.1 ELECTRICAL DIAGNOSTICS (HW3000/L MODELS)

General Electrical Check

Check for Tripped Duplex Circuit Breaker(s)

Outlets Above the Breaker Indicate

the Excess Load Source

Resolve Overload Problem to Ensure Safe Operation

After Electrical Load Resolved Wait Several Minutes (for Thermal Breaker to Cool) Push to Reset Breaker

If Cannot Reset, Replace Breaker

Start Engine and Run at No Load

Check Engine Frequency = 61.5 to 63 Hz

Adjust Governor, if necessary

(see Manual Section “Governor Adjustment”)

If Frequency Still Out of Range, see Engine Diagnostics Section

Check Voltage Output at NEMA 5-20R 120V

Duplex Outlet #1

W X 123-

126V G

If Voltage Out of Range,

Perform “120V Circuit #1 Check”

Check Voltage Output at NEMA 5-20R 120V

Duplex Outlet #2

W Y

123-

126V G

If Voltage Out of Range,

Perform “120V Circuit #2 Check”

120V Circuit #1 Check

(No Output OR

Voltage Out of Spec)

Conduct This Check Only When

Directed by General Electrical Check

Remove Alternator End Cover

Check Wires and Connections

from AVR to Brush Assembly

for Proper Orientation

of Wire Connections

If a Connection is Loose or Disconnected, Reestablish a Tight Connection

If a Wire or Connection is Damaged,

Replace AVR

Check Wires and Connections

for the Exciter & AVR Tap

from AVR to Alternator

On AVR Side of Connection:

If a Connection is Loose or

Disconnected, Reestablish a

Tight Connection

If a Wire or Connector is Damaged,

Replace AVR

On Alternator Side of Connection:

If a Connection is Loose or

Disconnected, Reestablish a

Tight Connection

If a Wire or Connector

is Damaged,

Replace Alternator

Check for Continuity from

Duplex Outlet #1

for Each Connection (X, Y, W, G) to Corresponding Alternator Terminal

If Continuity Not Present

in Any Circuit,

Check Wires and Connections

from Receptacle to Alternator

If a Connection is Loose or

Disconnected, Reestablish a Tight Connection and Recheck Continuity

If a Wire or Connection is Damaged,

Replace Electrical Panel

Check for Continuity in

Duplex Outlet #1 Breaker

from the Line Terminal to the Load Terminal

If No Continuity,

Replace Duplex Circuit Breaker

Check for Continuity in Each Circuit of

Duplex Outlet #1

from the Female Socket on the Front

to the Terminal on the Back

If No Continuity,

Replace Duplex Receptacle

If Continuity Present,

Replace Electrical Panel

Perform “Alternator Check”

Start Engine and Run at No Load

Check Output Voltage (X to W) of Duplex Outlet #1= 123-126V

Adjust Voltage Regulator, if Necessary by Turning the Potentiometer on the Rear of the Voltage Regulator

If Voltage Still Out of Range

Replace Voltage Regulator

120V Circuit #2 Check

(No Output OR

Voltage Out of Spec)

Conduct This Check Only When

Directed by General Electrical Check

Remove Main Control Panel from

Control Panel Assembly

Check Continuity from Duplex Outlet #1

for Each Connection (X or Y, W, G) to Duplex Outlet #2

If Continuity Not Present

in Any Circuit,

Check Wires and Connections from Duplex Outlet #1 to Duplex Outlet #2

If a Connection is Loose or Disconnected, Reestablish a Tight Connection and Recheck Continuity

If a Wire or Connection

is Damaged,

Replace Electrical Panel

Check for Continuity in

Duplex Outlet #2 Breaker

from the Line Terminal to the Load Terminal

If No Continuity,

Replace Duplex Circuit Breaker

Check for Continuity in Each Circuit of

Duplex Outlet #2

from the Female Socket on the Front

to the Terminal on the Back

If No Continuity,

Replace Duplex Receptacle

If Continuity Present,

Replace Electrical Panel

Refer to Illustrations on Pages 8-3 and 8-5.

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