Valve Coils - Genie GS-3384 Service And Repair Manual

September 2016
7-11 Valv e C oils
7-11

Valve Coils

How to Test a Coil
A properly functioning coil provides an
electromotive force which operates the solenoid
valve. Critical to normal operation is continuity
within the coil that provides this force field.
Since coil resistance is sensitive to temperature,
resistance values outside specification can
produce erratic operation. When coil resistance
decreases below specification, amperage
increases. As resistance rises above specification,
voltage increases.
While valves may operate when coil resistance is
outside specification, maintaining coils within
specification will help ensure proper valve function
over a wide range of operating temperatures.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
Note: If the machine has been in operation, allow
the coil to cool at least 3 hours before performing
this test.
1 Tag and disconnect the wiring from the coil to
be tested.
2 Test the coil resistance using a multimeter set
to resistance (Ω). Refer to the Valve Coil
Resistance Specification table.
Result: If the resistance is not within the
adjusted specification, plus or minus 10%,
replace the coil.
Part No. 1272222
Valve Coil Resistance
Specification
Note: The following coil resistance specifications
are at an ambient temperature of 68°F / 20°C. As
valve coil resistance is sensitive to changes in air
temperature, the coil resistance will typically
increase or decrease by 4% for each 18°F / 10°C
that your air temperature increases or decreases
from 68°F / 20°C.
Description
Proportional solenoid valve, 12V DC
(schematic item AD)
Solenoid valve, 3 position 4 way, 10V DC
(schematic items AG and AK)
Solenoid valve, 3 position 4 way, 10V DC with
diode (schematic item AH)
Solenoid valve, 2 position 2 way, 10V DC
(schematic items CA, CB, CC and CD)
Solenoid Valve, 2 position 3 way, 10V DC
(schematic item AL)
Solenoid valve, 2 position 2 way, 12V DC with
diode (schematic item DA)
Solenoid Valve, 2 position 3 way, 12V DC with
diode (schematic items DE and DF)
Solenoid valve, 2 position 2 way, 12V DC with
diode (schematic item DG)
Solenoid Valve, 2 position 3 way, 10V DC with
diode (schematic items EF and EJ)
Solenoid Valve, 2 position 3 way, 10V DC
(schematic item FC)
GS-84 • GS-90
Service and Repair Manual
Manifolds
Specification
4.1Ω
3.6Ω
7.2Ω
5.5Ω
6Ω
7.5Ω
10Ω
10Ω
7Ω
6Ω
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