To Next PageTo Next PageWhat to do if my Ranco ETC displays 'EP'?
If your Ranco Temperature Controller displays 'EP', first verify if the sensed temperature is within the expected range. If the temperature appears correct, inspect the probe for potential damage by comparing its reading to a known ambient temperature between -30°F and 220°F. If the probe's reading is inaccurate, replace it.
How to fix 'CL' message on my Ranco ETC Temperature Controller?
If your Ranco Temperature Controller shows a 'CL' message, try removing power to the control for at least five seconds, then reapply power. If the 'CL' message persists after doing this, the control needs to be replaced.
What to do if my Ranco ETC displays 'E2'?
If your Ranco Temperature Controller displays 'E2', carefully review all settings and correct any that are incorrect.
Why does my Ranco ETC show 'E1'?
If the 'E1' message appears on your Ranco Temperature Controller, and no keys are being pressed, it indicates that the control needs to be replaced.
General| Display | LED |
|---|---|
| Control Type | On/Off |
| Output | SPDT Relay |
| Accuracy | ±1°F (±0.5°C) |
| Enclosure Rating | NEMA 1 |
| Sensor Type | NTC Thermistor |
| Number of Outputs | 1 |
| Temperature Differential | Adjustable |
| Mounting | Panel |
| Input Voltage | 120/240V AC, 50/60Hz |
| Power Supply | 120/240V AC, 50/60Hz |
Wide setpoint temperature range and adjustable differential.
Easy selection of setpoint, differential, and heating/cooling modes.
Two individually programmable stages for heating or cooling.
Constant readout of temperature/settings and display backlight.
IP67 rated thermistor probe for remote sensing up to 400 feet.
Includes SPDT relays, Fahrenheit/Celsius scales, lockout, optional output.
Details input voltage options and power consumption.
Defines operating temperature and differential ranges.
Specifies switch action (SPDT) and NTC thermistor sensor.
Specifies control ambient temperature, storage, and humidity.
Lists part numbers, voltage, stages, and analog output options.
Explains LCD function for temperature readout and settings.
Describes backlight activation when keys are pressed.
Details how setpoint, differential, and modes are determined.
Explains delay feature to protect compressors in cooling mode.
Select Fahrenheit or Celsius scale for temperature display.
Set the desired temperature for Stage 1 operation.
Set the differential for Stage 1 to control cycling.
Select cooling (C1) or heating (H1) mode for Stage 1.
Configure the delay for compressor protection in cooling mode.
Set the desired temperature for Stage 2 operation.
Set the differential for Stage 2 to control cycling.
Select cooling (C2) or heating (H2) mode for Stage 2.
Final step to confirm all programmed settings.
How to use the lockout switch to prevent keypad tampering.
Error E1 indicates issue with key presses or control replacement.
Error E2 signifies settings not stored, requiring correction.
Error EP indicates probe issue (open, shorted, out of range).
Error EE indicates EEPROM corruption, requiring control replacement.
Error CL indicates calibration mode entry, requires power cycle.
Guidelines for mounting the ETC control to a flat surface.
Information on using 1/2 inch conduit connections and hub security.
Conformity to NEC, load limits, copper conductors, slack for wiring.
Diagrams for 24V AC and Line Voltage wiring.
Details the 0-10V analog output signal representation.
Prohibits field calibration; recommends replacement controls.
Guidelines for mounting sensor for space or spot sensing.
How to extend sensor cable up to 400 feet using 22 AWG wire.
Steps to verify installation and check sensor resistance.
Explains easy sensor replacement using the Quick Connect feature.
Provides part numbers for ordering replacement sensors.
