EcoSmart ES50LVP Installation, Operation And Maintenance Manual - Troubleshooting
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3. On the bottom side of the upper cover, disconnect the supply air temperature sensor by
sliding out the rubber grommet.
4. Gently pull out the black wire until a white connector is revealed.
5. Unplug the white connector noting that there is a polarizing/locking feature when re-
assembling.
6. Remove (Qty. 2) ¼-20 bolts, lockwashers and flat washers holding the control and
blower assembly to the centre plate.
7. Slide out assembly.
8. Re-assemble in the reverse order.
TROUBLESHOOTING
Thermostat call error
If the ecosmart does not run when the thermostat is calling, jumper R to W for heating, or R to
Y (Y2) to verify if the problem is with the thermostat or ecosmart control. Note that some
thermostats have a delay (typically five minutes) before they will re-start cooling.
External pump does not run
In areas where hard water is present the pump may stick and fail to run. Often, closing the
isolation valve on the return leg and opening the drain port so that water flows through the
pump can free this. If this fails to free the pump, removal for cleaning or replacement is
necessary. The daily pump exerciser will help prevent pump sticking.
External pump is noisy at start-up
If sound has not diminished within 1 minute, air may be present in the system and may need re-
purging. If the heat source is a water heater, check to make sure branch connections for the
heating loop are horizontal to prevent the collecting of air in the loop.
Water heater temperature and pressure relief valve is weeping
A check valve or back-flow preventer may have been installed in the system. Some form of
pressure relief may be required. Consult water heater manufacturer’s instructions. An
expansion tank may be required.