MULTIQUIP DA7000 Series Manual

TI_DA7000_Voltage_Diagnostic 05/19/2011
1
Technical Information
Product Group
:
Generator
Model: DA7000 Series
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DA7000 Voltage Diagnostic
This documentation can be used as a guide when inspecting and diagnosing failure associated with the AC
voltage output on the DA7000 series generator.
Use of an accurate multi
-
meter is necessary when inspecting the generator.
Safety precautions should be followed at all times when servicing this
equipment. Consult operations manual for more safety information.
Component Identification and Location
Screws
TB2
(terminal board 2)
Fuse Box
TB1
(terminal board 1)
CB
(circuit breaker)
RE1
(diode rectifier)
R
(resistor)
Mounted behind panel
To access components to be inspected
remove control panel, (4) Phillip head screws.

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Technical Information
Inspection Procedure
Check the following with the engine off!
•Inspect F4 fuse, (see page 3).
•Inspect (J) terminal on TB2 for 12V DC when starter switch key is in the run position, (see page 3).
Starter Switch
( MQ part# )
3741059110
•Inspect for loose wires, contacts, or damaged receptacles, starter switch, & circuit breakers.
•Remove J-K bottom yellow wires from TB2 (stator excitation windings) perform a resistance test, (see page 3).
…………………………………. .Resistance specification: 1.63 ohms
•Perform a resistance test between stator windings wires U1 to V1 and U2 to V2 …
Resistance specification: .16 ohms (located at TB1)
•NOTE: Before performing resistance test always disconnect and isolate the wires to be tested. Resistance
(nominal reading ± 10%)). When checking resistance also check each wire for continuity to ground for open
circuits.
•Inspect RE1 diode rectifier for continuity/no continuity as shown below.
(Disconnect the leads to properly check the rectifier & resistor)
•
••
•Excitation & Output Windings – Pg. 3
•
••
•Resistor & Rectifier – Pg. 4
•
••
•Engine Diagram – Pg. 5
•
••
•Generator Diagram – Pg. 6
•Perform a resistance test on the ‘R’ resistor - Resistance specification: 10 ohms (see page 4)

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Technical Information
F4
–
5amp
( MQ part# )
0601806642
J & K
TB2 and Fus
e Box
U & N provides 120V AC to the receptacles
N & V provides 120V AC to the receptacles
TB1
U & N
N & V
Excitation &
Output Windings
Inspect fuse with multi-meter, ensure
inside filament is intact.

TI_DA7000_Voltage_Diagnostic 05/19/2011
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Technical Information
RE1 & R
Resistor &
Rectifier
RE1 & R is mounted behind the panel by machined screws
RE1
R
There are two rectifiers at this location, the top one RE1 is for excitation.
RE1
(Diode Rectifier) ( MQ part# 0601823204 )
prevents voltage spikes or back feed in the circu
it.
R
(Resistor) ( MQ part# 0601842463 )
opposes the electrical current by producing a voltage drop
between it’s terminals in proportion to the current. (controls the flow of electrical current)

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Technical Information
Engine Wire Diagram

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Technical Information
Generator Wire Diagram