Hunter Genesis: “Fuse Open” Message on Timing Mechanism
LESSON SUMMARY: This lesson is designed to assist the user in troubleshooting which component failures within the satellite could cause the Timing Mechanism to display a message of “Fuse Open.”
Special Tools Needed: Digital Multimeter
⚠ CAUTION: THIS LESSON MAY INCLUDE INSTRUCTIONS TO TEST HAZARDOUS VOLTAGES (120V-240V) THAT CAN CAUSE SERIOUS INJURY OR DEATH. IT IS RECOMMENDED THAT A LICENSED ELECTRICIAN BE CONTRACTED TO PERFORM SUCH TESTS.
🛑 STOP: ALWAYS TURN OFF THE POWER TO THE SATELLITE BEFORE REMOVING OR INSTALLING ELECTRONIC COMPONENTS.
If the display on a Hunter Genesis Timing Mechanism reads “Fuse Open!,” this message is referring to the 3-AMP Fast-Acting Fuse located on the Power Supply Board. If the Timing Mechanism is displaying “Fuse Open!”, the 3-AMP Fast-Acting Fuse, Timing Mechanism or Power Supply Board could be damaged. Follow the guided steps below to determine which component(s) require replacement.
Testing the 3-AMP Fast-Acting Fuse:
*Note: Visually inspecting a fuse is never a trustworthy method to determine the failure or functionality of the fuse.
The 3-AMP Fast-Acting Fuse is located on the Power Supply Board. The Power Supply Board is located in the satellite enclosure directly above the TRIAC Board in the first position.
Start by removing the 3-AMP Fast-Acting fuse from its holders.
Use a digital multimeter on the resistance setting or continuity setting with an audible beep. If using the resistance setting, touch the two multimeter probes together and note the reading on the display; it should be 0 or very close to 0. *Note: Different multimeters will vary slightly.
Proceed to place one probe on each end of the fuse.
If using a digital multimeter on the resistance setting, a working fuse will display a reading close to the reading that was displayed when the two probes were touched together: 0 or very close to 0.
If using a digital multimeter on the continuity setting, a working fuse will create an audible beep.
If the digital multimeter reads Over Limit “OL” on the resistance setting, or no audible beep is heard on the continuity setting, the fuse is damaged and should be replaced.
If the fuse is known to be working properly, the Timing Mechanism and Power Supply Board will need to be tested.
Testing the Timing Mechanism:
The Timing Mechanism is located at the top of the satellite under the top lid enclosure.
Start by powering off the satellite using the On/Off switch located on the front of the Power Supply Assembly.
Next, unplug the ribbon cables on the Timing Mechanism from the Power Supply Board and Communication Board (if present).
Press the clip on the right side of the Timing Mechanism to release it from the satellite.
Remove the Timing Mechanism and take it to a known-working satellite location to test.
*Note: Prior to installing the Timing Mechanism at a known-working satellite location, be sure to power off the satellite at the known-working satellite location. Power to the satellite should always be off before installing or removing components.
If the Timing Mechanism continues to display the error message “Fuse Open!” when installed at a known-working satellite location, the Timing Mechanism is damaged and should be replaced.
If the Timing Mechanism does not display the error message “Fuse Open!” when installed in a known-working satellite location, the Power Supply Board at the original satellite location will need to be tested.
Replacement Timing Mechanisms can be purchased here.
Testing the Power Supply Board:
The Power Supply Board is located in the satellite enclosure directly above the TRIAC Board in the first position.
Start by powering off the satellite.
Next, unplug all cables and connectors from the Power Supply Board.
Proceed to unclip and remove the Power Supply Board from the satellite and take it to a known-working satellite location to test.
*Note: Prior to installing the Power Supply Board at a known-working satellite location, be sure to power off the satellite at the known-working satellite location. Power to the satellite should always be off before installing or removing components.
If the Timing Mechanism at the known-working satellite location displays the error message “Fuse Open!” after the Power Supply Board has been installed, the Power Supply Board is damaged and should be replaced.
Replacement Power Supply Boards can be purchased here.
Lesson tags: hunter, genesis, hunter genesis, genesis repair, genesis help, genesis troubleshooting, genesis exchange, genesis motherboard, genesis timing mechanism, genesis faceplate, boardtronics
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