3 - 124
S-100 • S-105 • S-120 • S-125
Part No. 1268494
March 2017
Section 3 • Repair Procedures
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 / 20°C
that your air temperature increases or decreases
from 68°F / 20°C.
Description
Specification
Solenoid valve, 2 position 3 way, 12V DC
9
Ω
(schematic item DA, DO, FB, FC)
Solenoid valve, 3 position 4 way, 12V DC
9.8
Ω
(schematic item EA, EB, EC, ED)
(before serial number 292)
Solenoid valve, 3 position 4 way, 12V DC
8.8
Ω
(schematic item EA, EB, EC, ED)
(after serial number 291)
Proportional solenoid valve, 12V DC
5.4
Ω
(schematic item FG, BG, GD, GH)
Proportional solenoid valve, 12V DC
5
Ω
(schematic item FB, FF, BB, BF)
3 position 4 way D03 valve, 12V DC
4.6
Ω
(schematic item FD, BD)
Solenoid Valve, 2 position 3 way, 12V DC
4.6
Ω
(schematic item FQ, FR, BQ, BR)
Solenoid Valve, 2 position 2 way, 12V DC
7.2
Ω
(schematic item BN, BO)
Solenoid valve, 3 position 4 way 12V
7.2
Ω
(schematic items ES, FC, BC)
(before serial number 292)
Solenoid valve, 3 position 4 way 12V
7.1
Ω
(schematic items ES)
(after serial number 291)
Solenoid valve, 2 position 3 way 12V
7.2
Ω
(schematic items AA)
How to Test a Coil Diode
Genie incorporates spike suppressing diodes in
all of its directional valve coils except proportional
valves and those coils with a metal case. 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. Refer to,
How to
Test a Coil.
2 Connect a 10
Ω
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.
Note: The battery should read 9V DC or more
when measured across the terminals.
9V
BATTERY
10
RESISTOR
AMMETER
COIL
+
-
+
-
d
a
b
b
c
c
a multimeter
b
9V DC battery
c 10
Ω
resistor
d coil
Note: Dotted lines in illustration indicate a
reversed connection as specified in
step 6
MANIFOLDS
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