Electrical Diagnostics - Honeywell HW7000EH Service Manual

8.1 ELECTRICAL DIAGNOSTICS

General Electrical Check
Check for Tripped Master Breaker
Resolve Overload Problem
to Ensure Safe Operation
After Electrical Load Resolved
Push to Reset Breaker
If Cannot Reset, Replace Breaker
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
= 62.5 Hz + 0.5
Adjust Governor, if necessary
(see Honda Shop Manual)
If Frequency Still Out of Range,
see Honda Shop Manual
for Engine Troubleshooting
Check Voltage Output at
NEMA L14-30R 240V Receptacle
246-
G
252V
Y
W
123-
126V
If Voltage Out of Range,
see "240V Circuit Check"
Check Voltage Output at
NEMA 5-20R 120V
Duplex Outlet #1
W
G
123-
126V
If Voltage Out of Range,
see "120V Circuit Check"
Check Voltage Output at
NEMA 5-20R 120V
Duplex Outlet #2
W
G
123-
126V
If Voltage Out of Range,
see "120V Circuit Check"
Honeywell Portable Electrical Generator Service Manual
240V Circuit Check
(Out of Spec Voltage)
Conduct This Check Only When
Directed by General Eletrical Check
Check Master Breaker Continuity
If Out of Range, Replace Breaker
Check Continuity from
NEMA L14-30R 240V Receptacle
For Each Connection (X, Y, W, G)
to Corresponding
Alternator Terminal
If No Continuity,
Check for Tight Connections
at the Receptacle & Alternator
If Connections Did
Not Correct Continuity,
Replace Electrical Panel
Check Alternator Brushes
for Residue or Defect
(see Manual Section
"Alternator - Carbon Brushes")
Check Rotor Winding
(see Manual Section
"Alternator -
Rotor Winding Connection")
Check Main Winding
(see Manual Section
"Alternator -
Main Winding Terminal Block")
Check Exciter Winding
(see Manual Section
X
"Alternator -
Exciter Winding Connector")
123-
126V
Start Engine and Run at No Load
Check Output Voltage = 246-252V
Adjust Voltage Regulator,
if necessary
If Voltage Still Out of Range
Replace Voltage Regulator
Y
X
ELECTRICAL DIAGNOSTICS
120V Circuit Check
(Out of Spec Voltage)
Conduct This Check Only When
Directed by General Eletrical Check Directed by General Eletrical Check
Check Duplex Outlet
Breaker Continuity
If Out of Range, Replace Breaker
Check Continuity from
NEMA 5-20R 120V Duplex Outlet
For Each Connection (X or Y, W, G)
to NEMA L14-30R 240V
Receptacle
If No Continuity,
Check for Tight Connections
at the Receptacle & Alternator
If Connections Did
Not Correct Continuity,
Replace Electrical Panel
See "Specifications" Page For
Rated Power, Voltage, & Frequency Specs
Under Load and No Load Conditions
NEMA 5-20R NEMA 5-20R
120V 120V
Duplex Outlet #1 Duplex Outlet #2
www.honeywellgenerators.com
Rated Power Check
(Low Power Output)
Conduct This Check Only When
NOTE: At high-altitudes, standard
carburetor air-fuel mixture will be
rich causing a decrease in engine
performance and an increase in
fuel consumption.
If generator will always operate
in altitudes higher than 5000 feet
(1500 meters), install smaller
carburetor main fuel jet and
readjust pilot screw.
Start Engine and
Add Resistive Loads Until
One of the Following Occurs:
Rated Power Specification Range
Output at the
NEMA L14-30R 240V Receptacle
Drops Below Minimum
228-
G
252V
X
Y
W
114-
114-
126V
126V
If Minimum Rated Power Cannot
Be Achieved, see Honda Shop
Manual for Engine Troubleshooting
NEMA 14-30R
240V
Receptacle
8-2