Page 1
ES50HVP / ES90HVP HIGH VELOCITY AIR HANDLER Service Manual Ecosmartair 105 Haist Avenue, Unit 10 Vaughan, ON L4L 5V6 905-857-9755 ecosmartair.com P/N 14010A...
Contents CONTROL ASSEMBLY LAYOUT .................... 3 CONTROL ASSEMBLY LEGEND .................... 4 REMOVING BLOWER/CONTROL ASSEMBLY ..............5 TROUBLESHOOTING ......................5 Smart/WiFi thermostat not working properly ..................5 Thermostat call error ..........................6 Fan not running ............................. 6 Fan runs for cooling but not for heating ....................6 External pump does not run (sticking issue) ..................
CONTROL ASSEMBLY LEGEND Refer to Figure 1 (bolded numbers on left side are referred to in troubleshooting) 120VAC 60Hz single phase power input 120VAC 250W Max. pump output from relay Thermostat connection: R, G, Y2, Y, W, interrupted C 0-10VDC output voltage for variable speed pump Auxiliary 24VAC accessory output –...
REMOVING BLOWER/CONTROL ASSEMBLY Blower and control assembly can be removed as a single piece: • Turn off power to ecosmart • Disconnect AIR OUT temperature sensor (white plug/socket) just above front centre plate (8) and pull up out of the way to prevent damage to the cable when sliding out assembly •...
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 to prevent compressor damage.
External pump does not run (electrical issue) Two types of pumps can be used with the ecosmart: standard 120VAC pumps or variable speed pumps with a 0-10V control voltage input. 1. Jumper R to W (3) or set to test mode – Options DIP switch 6 on 2.
OPTION switch 6 to the OFF position. The calibration parameter is now permanently stored in the control board and will be retained even if power is removed from the ecosmart. If the heat airflow rate setting is changed, calibration must be repeated for correct operation.
Page 10
As a workaround until the board is replaced, set OPTIONS switch 4 to the off position and the ecosmart will run in fixed airflow mode. P a g e...