Honeywell Portable Electrical Generator Service Manual www.honeywellgenerators.com 8-2
ELECTRICAL DIAGNOSTICS
8.1 ELECTRICAL DIAGNOSTICS
See “Specifications” Page For
Rated Power, Voltage, & Frequency Specs
Under Load and No Load Conditions
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
G
Y
W
X
123-
126V
246-
252V
123-
126V
If Voltage Out of Range,
see “240V Circuit Check”
W
G
Y
123-
126V
Check Voltage Output at
NEMA 5-20R 120V
Duplex Outlet #1
If Voltage Out of Range,
see “120V Circuit Check”
W
G
X
123-
126V
Check Voltage Output at
NEMA 5-20R 120V
Duplex Outlet #2
Check Master Breaker Continuity
If Out of Range, Replace Breaker
240V Circuit Check
(Out of Spec Voltage)
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
“Alternator -
Exciter Winding Connector”)
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
120V Circuit Check
(Out of Spec Voltage)
Rated Power Check
(Low Power Output)
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:
s0OWER/UTPUTIS7ITHIN
Rated Power Specification Range
s&REQUENCY$ROPS"ELOW(Z
s6OLTAGEOutput at the
NEMA L14-30R 240V Receptacle
Drops Below Minimum
G
Y
W
X
114-
126V
228-
252V
114-
126V
If Minimum Rated Power Cannot
Be Achieved, see Honda Shop
Manual for Engine Troubleshooting
General Electrical Check
Check Output Voltage = 246-252V
Adjust Voltage Regulator,
if necessary
If Voltage Still Out of Range
Replace Voltage Regulator
If Voltage Out of Range,
see “120V Circuit Check”
NEMA 5-20R
120V
Duplex Outlet #1
NEMA 5-20R
120V
Duplex Outlet #2
NEMA 14-30R
240V
Receptacle
Conduct This Check Only When
Directed by General Eletrical Check
Conduct This Check Only When
Directed by General Eletrical Check
Conduct This Check Only When
Directed by General Eletrical Check
Start Engine and Run at No Load
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