Master Lock MGR2900A - Manual (Page 14)

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PORTABLE GASOLINE GENERATORS
R
TROUBLESHOOTING
WARNING: Only a qualified electrical service person should service
and repair generator. Use only factory approved replacement parts.
POSSIBLE CAUSE
1. Loss of residual magnetism
2. Winding short circuit or loose
connections
3. Defective rotor diode
4. Defective capacitor
1. Engine speed too low
2. Defective rotor diode
3. Partial short circuit in winding
4. Defective capacitor
1. Engine speed too high
1. Defective rotor diode
2. Electrical load too high
3. Engine not running properly
OBSERVED PROBLEM
No voltage when starting generator with no
electrical load
Voltage is less than normal voltage with no
electrical load
Voltmeter reading more than 10% high with
no electrical load
Voltmeter reading correct with no electrical
load, but more than 10% low when electrical
load is added
REMEDY
1. Apply 12-volt battery to capacitor ter-
minals for 2-3 seconds
2. Check resistance of coils (see Electrical
Component Specifications, page 15)
3. Replace both diodes on rotor
4. Replace capacitor
1. Set engine speed to 3800 RPM (63 Hz)
with no load
2. Replace both diodes on rotor
3. Check resistance of coils (see Electrical
Component Specifications, page 15)
4. Replace capacitor
1. Set engine speed to 3800 RPM (63 Hz)
with no load
1. Replace both diodes on rotor
2. Do not overload generator
3. Contact an authorized engine service
center
STORAGE
Note: For additional help, visit DESA
Specialty Products’™ technical service
web site at www.desatech.com.
www.desatech.com
Note: See engine owner’s manual for engine troubleshooting.
SERVICING THE
ENGINE
Robin parts and services should be handled
by your nearest authorized engine service
firm. Visit:
www.robinamerica.com
or call Robin direct:
1-800-277-6246
IMPORTANT: Keep generator level while in
storage. Never store generator upside down
or standing on end.
Note: We supply the engine owner’s manual
with generator. Refer to that manual for
questions concerning engine storage.
WARNING: The muffler be-
comes very hot during operation.
The muffler remains hot for a
while after shutdown. Let engine
cool before storing.
WARNING: Remove all fuel from
fuel tank before storing generator.
Store fuel in approved container.
Store fuel in a well-vented area free
of open flames or sparks.
Use a fuel additive, such as STA-BIL ® or an
equivalent, when storing generator with fuel
in fuel tank. This will minimize fuel gum
deposits from forming in engine.
Cover and store generator in a clean, dry
place. Do not expose generator to extreme
high or low temperatures during storage.
TECHNICAL
SERVICE
You may have further questions about as-
sembling, operating, or maintaining this
product. If so, you can visit our Technical
Service web site at www.desatech.com or
contact our Technical Service Department
at 1-800-858-8501 (English Only). You may
also write to:
DESA Specialty Products™
ATTN: Technical Service Specialty Products
P.O. Box 90004
Bowling Green, KY 42102-9004
When contacting DESA Specialty Prod-
ucts™, have ready
• Your Name
• Your Address
• Your Phone Number
• Model Number of Product
• Serial Number
• Date of Purchase (Include copy of receipt
for written requests).