What to do if WFCO Switch has no power on both circuits?
If there is no power on both circuits of your WFCO Switch, first verify that the RV has power and reset the EM-## breaker. If that doesn't work, power the EM-## for 5 minutes and verify operation.
What to do if WFCO Switch has no LED lights on the remote?
If the remote for your WFCO Switch has no LED lights, check the following: * Verify that the RV has power and reset the EM-## breaker. * Replace the remote cable. * Replace the remote.
What to do if WFCO EM-15 Switch has no power on one circuit?
If there is no power on one circuit of your WFCO Switch (and the other circuit is working), here are a few things to check: 1. Ensure the load is turned ON. 2. The EM-## may have turned off 1 circuit because of current draw. Turn OFF power to the operating circuit appliance, wait 5 minutes, and verify operation of the other circuit appliance. 3. The EM-## may be in “OFF- time delay”. Power the EM-## for 5 minutes and verify operation.
Why WFCO EM-15 Switch doesn’t work on the remote?
If your WFCO Switch isn’t working on the remote, it could be due to the following reasons: 1. The EM-## may be in “OFF- time delay”. To resolve this, power the EM-## for 5 minutes and verify operation. 2. The remote may be defective. Try replacing the remote.
How to fix WFCO Switch when both circuits are on at the same time?
If both circuits on your WFCO Switch are on at the same time, it could be due to: 1. Total current draw may be below the trip point. Turn both appliances on high and verify that the circuit breaker doesn’t trip. 2. The EM-## may be in the wrong mode. Refer to a qualified service technician for mode verification.
Explains the EM-15/EM-20 as a cost-efficient energy management branch circuit expander for RVs.
Details the EM-15/EM-20 as an Energy Management Switch for sharing power between two loads in RVs.
Describes the different operational modes for the EM-15 and EM-20 units, including Power Relay and Logic Relay modes.
Details the function and operation of the EM-20 remote control panel for managing circuit priority.
Explains how the remote panel's LEDs indicate circuit priority and how the priority can be changed by the user.
Provides information on the three primary mounting configurations for the EM-15/EM-20 enclosure.
Instructs on mounting the remote-control panel in an accessible location and routing the cable.
Illustrates the overall system wiring for the EM-15/EM-20, including shore power and breaker panel connections.
Shows the internal wiring diagram of the EM-15 and EM-20 units, detailing connections for loads and remote control.
Provides step-by-step instructions for wiring the EM-15/EM-20, including conductor types and torque recommendations.
Details the wiring for air conditioners with energy management system inputs using the EM-20's logic relays.
The WFCO EM-15 / EM-20 is a cost-efficient energy management switch designed for recreational vehicles (RVs) to share power from a single 15A or 20A branch circuit between two mid-to-large loads. This device prevents circuit breakers from tripping by intelligently managing power distribution to appliances such as microwaves, fireplaces, hairdryers, water heaters, or even two air conditioners. The EM-20 model is particularly useful for RVs with 30A AC service that have two air conditioners.
The EM-15 / EM-20 applies power to both connected loads until the total loaded current exceeds a preset threshold (approximately 13.5A for EM-15 and 18A for EM-20). When this threshold is exceeded, the device automatically cuts power to the secondary load while maintaining power to the primary load. Power to the secondary load is restored when the total loaded current drops below a lower preset level (approximately 5A). The default primary (priority) branch is Circuit A, with the secondary load wired to Circuit B.
The EM-15 operates in a single "Power Relay Mode." After a short delay of approximately 4 seconds upon power application, both primary and secondary circuits receive power. It continuously monitors current and shuts down the secondary circuit if levels reach approximately 13.5A. Power returns to the secondary circuit once current drops below 5A.
The EM-20 offers four basic modes of operation, selectable via an internal red & white switch:
The EM-20 logic relays provide dry relay contacts (simple low current switch closure). In normal operation with both circuits ON, the logic relays are de-energized (common connected to normally closed contacts). When total current exceeds the upper trip limit, the logic relay for the secondary channel is energized (common connected to normally open contacts).
To Next Page
General
