EcoSmart ECO Series User Manual

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This page will help you navigate our troubleshooting guide. Read the each step carefully and do not skip
ahead. For additional help, contact technical support by email at support@ecosmartus.com, or call 877-
474-6473, Monday-Friday, 9:00 am—5:00 pm EST.
Existing installations
 LED display light is not activating with flow rate
o Follow Activity B (page 6)
 LED display light is illuminated on heater, but unit is not heating
o Follow Activity A (page 4)
 Not receiving power at unit
o Follow Activity C (page 8)
 Unit is no longer producing adequate heat, but is activating
o Follow Activity E (page 12), and then Activity F (page 14)
New installations (same day install)
 LED display light is not activating with flow rate, but does when rotating round knob
o Follow Activity B (page 6)
 LED display light is illuminated on heater, but unit is not heating
o Follow Activity C (page 8)
 Unit is not activating, even when rotating round knob
o Follow Activity D (page 10) & E (page 12)
Error Codes
 E 1 - Inlet Thermistor (Page 19)
 E 2 – Outlet Thermistor (Page 20)
 E 3 – Both Thermistors (Page 21)
 E4 – High Temp (Page 22)
 E 5 – High Flow Rate (Page 23)
 S 103 – Low Voltage (Page 24)
When contacting technical support, please have your model and serial number ready. The serial number
is located on the front cover of the unit. Serial number is printed on a white and black pixelated sticker
and begins with the letters S/N followed by numbers (see image below).

EcoSmart ECO Series Specifications

General

Energy Efficiency	99.8%
Weight	6.5 lbs
Brand	EcoSmart
Type	Tankless
Temperature Range	80°F - 140°F
Flow Rate	Up to 2 GPM
Warranty	Limited Lifetime
Voltage	240V