WFCO EM-15 - EM-15; EM-20 Troubleshooting Guide

13
Symptom Potential Reason Action to Perform
No power on both circuits. 1. No power to EM-##
2. EM-## is in “OFF-time
delay”
1. Verify that the RV has
power & reset the EM-##
breaker
2. Power the EM-## for 5
minutes & verify operation
No power on one circuit
(the other circuit is OK).
1. Load may not be turned
ON
2. EM-## may have turned
o 1 circuit because of
current draw
3. EM-## may be in “OFF-
time delay”
1. Turn ON both loads
2. Turn OFF power to the
operating circuit appliance,
wait 5 minutes & verify
operation of the other
circuit appliance
3. Power the EM-## for 5
minutes & verify operation
Both circuits are on at the
same time.
1. Total current draw may
be below the trip point
2. EM-## may be in the
wrong mode
1. Turn both appliances
on high & verify that the
circuit breaker doesn’t trip
2. Refer to qualied service
technician for mode
verication
No LED lights on the
remote.
1. No power to EM-##
2. Bad connection on the
remote cable
3. Defective remote
1. Verify that the RV has
power & reset EM-##
breaker
2. Replace remote cable
3. Replace remote
Switch doesn’t work on the
remote.
1. EM-## may be in “OFF-
time delay”
2. Defective remote
1. Power the EM-## for 5
minutes & verify operation
2. Replace remote
Refer to the Troubleshooting Chart on the next page.
e air conditioner logic wiring chart assumes the air conditioner expects a relay contact
closure when the compressor should be o. Please refer to the air conditioner
manufacturers manual for more information.
EM-15 / EM-20 TROUBLESHOOTING