heat-timer ETS Installation And Operation Manual page 46

46 ETS Installation and Operation Manual
Symptom
No display or distorted
display.
Display shows sensor
"Open".
Display shows sensor
"Short".
System reads incorrect
temperature.
No hot water.
059326‐00 Rev D
Troubleshooting
Possible Cause
No power to the ETV Platinum
Plus Control Module, incorrect
or defective wiring.
Sensor disconnected.
Defective sensor, wires, or ETV
Platinum Plus Control Module.
Defective sensor, wires, or ETV
Platinum Plus Control Module.
Defective sensor or ETV
Platinum Plus Control Module.
If a flow switch is installed, the
Flow Switch option is set to
"Yes", and the flow input is
open, the mixing valve may be
marginally closed.
Water heater malfunction.
Recommended Action(s)
Verify the ETV Platinum Plus Control Module is
receiving power, all power wiring is in good
condition and connected.
The ETV Platinum Plus Control Module requires
120Vac power to terminal 1 and 2, and earth
ground wiring to terminal 3.
Turn power to the ETV Platinum Plus Control
Module off then back on.
Verify the sensor is properly connected to the ETV
Platinum Plus Control Module.
Short the sensor input wires. The display should
read "Short".
• If the display still reads "Open", the device is
defective. Replace the ETV Platinum Plus
Control Module.
• If the display reads "Short", test the sensor
wiring for continuity. Replace the sensor/
wiring.
Remove the sensor wires from the input terminals.
The display should read "Open".
• If the display still reads "Short", the device is
defective. Replace the ETV Platinum Plus
Control Module.
• If the display reads "Open", test the sensor
wiring for continuity. Replace the sensor/
wiring.
Disconnect the wires from the input terminals. The
display should read "Open".
• If the display does not read "Open", the device
is defective. Replace the ETV Platinum Plus
Control Module.
• If the control reads "Open", and the difference
is within 5°F, replace the sensor.
Verify Flow Switch setting and the position of the
mixing valve.
Check water heater(s) to ensure proper operation.
Heat‐Timer Corp.