Service & Troubleshooting Guide - Home Generator System - Models 040213 and 040234 (15kW)
Section 2 - Troubleshooting Information
Page 50
2
CHECKING THE STATOR WINDING
THROUGH THE HARNESS
Access Requirements:
• Access to CMA Board (
Related Fault Indications:
• Low Voltage (
FC_3
) and three remote blinks.
Checking the power winding resistance through the
harness ensures the integrity of the winding and the
associated wiring.
1. Set the SYSTEM switch to
OFF
and remove the 15
Amp fuse.
2. Turn the generator circuit breaker
OFF
3. Check between
Wire #11
and
Wire #22
(Fig. 42) or
NEUTRAL
4. Check between
Wire #44
and
Wire #22
(Fig. 42) or
NEUTRAL
.
Compare the readings from steps 3 and 4 with the power
winding resistance specifications on page 64.
Fig. 42 - Checking Stator Winding Through The Harness
NOTE
: Measuring through the harness will not
isolate a defective power winding but it will
validate a winding/wiring combination that is
serviceable.
To isolate the stator winding:
See “CHECKING THE STATOR POWER WINDING” on
page 51
CHECKING THE EXCITATION WINDING
IN THE GENERATOR
Access Requirements:
• Roof Removal (
)
• Remove The Exhaust Bulkhead (
)
• Remove The Blind-End Cover (
Related Fault Indications:
• Low Voltage (
FC_3
) and three remote blinks.
Gain access to the capacitors as mentioned above.
• Isolate The Capacitors
NOTE
: Use the manufacturer's instructions that
apply to the type of meter you are using. The
rated capacity is printed on the capacitors.
If a value discrepancy is found:
• Replace Capacitor
Check Excitation Winding (DPE) Resistance between
wires that were disconnected from capacitors and lead
into the stator (Fig. 43).
Compare your readings with the excitation winding
resistance specifications found on page 64.
Fig. 43 - Checking Excitation (DPE) Winding Resistance
If not:
• Check for short-to-ground.
If none:
•
See “REMOVE THE STATOR ASSEMBLY” on
.
If resistance reading is OK:
• Re-install/replace the capacitors
• Re-assemble the standby generator enclosure.
This is going to be done at the generator!
Summary of Contents for 40213
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