How To Test A Coil Diode - Genie Z-30/20N Service Manual

Service Manual
Manifolds

How to Test a Coil Diode

How to T est a Coil Di ode
Properly functioning coil diodes protect the
electrical circuit by suppressing voltage spikes.
Voltage spikes naturally occur within a function
circuit following the interruption of electrical current
to a coil. Faulty diodes can fail to protect the
electrical system, resulting in a tripped circuit
breaker or component damage.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
1 Test the coil for resistance. See, How to Test a
Coil.
2 Connect a 10Ω resistor to the negative
terminal of a known good 9V DC battery.
Connect the other end of the resistor to a
terminal on the coil.
Resistor, 10Ω
Genie part number
Note: The battery should read 9V DC or more when
measured across the terminals.
88
27287
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
1 multimeter
2 9V DC battery
3 10Ω resistor
4 coil
Note: Dotted lines in illustration indicate a reversed
connection as specified in step 6
3 Set a multimeter to read DC current.
Note: The multimeter, when set to read DC current,
should be capable of reading up to 800 mA.
4 Connect the negative lead to the other
terminal on the coil.
5 Momentarily connect the positive lead from
the multimeter to the positive terminal on the
9V DC battery. Note and record the current
reading.
April 2016
Part No. 139378