What does 'Er 4' or 'Open' mean on my 3M Laboratory Equipment?
- GGuy BrooksSep 23, 2025
If the alphanumeric display reads 'Er 4' or 'Open' on your 3M Laboratory Equipment, it indicates an open wire on the temperature sensor. Do not use the unit.
What does 'Er 4' or 'Open' mean on my 3M Laboratory Equipment?
If the alphanumeric display reads 'Er 4' or 'Open' on your 3M Laboratory Equipment, it indicates an open wire on the temperature sensor. Do not use the unit.
What to do if my 3M Ranger 247 Medical Equipment warming unit alerts after being turned off?
If the warming unit continues to sound alerts even after being turned off, it means the independent backup safety system has been activated. To stop the alerts, unplug the unit. Call 3M Patient Warming technical support.
What to do if nothing illuminates on the 3M Ranger 247 Medical Equipment warming unit panel?
If nothing illuminates on the warming unit panel, first ensure the unit is turned on and properly plugged into both the power entry module and a grounded outlet. If the issue persists, call 3M Patient Warming technical support.
What to do if the 3M Ranger 247 Medical Equipment warming unit alerts soon after plugging it in?
If the unit alerts shortly after being plugged in, check the test screw on the bottom of the unit. Ensure it is completely tightened. If the screw is missing, turn off and unplug the unit. Call 3M Patient Warming technical support.
What does 'Er 5' or 'Open' mean on my 3M Laboratory Equipment?
If the alphanumeric display reads 'Er 5' or 'Open' on your 3M Laboratory Equipment, it indicates electrical interference. Remove the unit.
What to do if my 3M Laboratory Equipment shows a 'HI' temperature alarm?
If your 3M Laboratory Equipment displays a 'HI' temperature alarm, it could be due to a change in flow rates, the unit reaching the set point before cassette insertion, or pre-warmed fluids. To resolve this: * Open the flow to reduce the temperature, the alarms should stop when the display reads 41°C and the unit is ready to use. * In case of prewarmed fluids, turn off the unit and discontinue infusion. Do not warm fluids before infusing them through the Ranger unit.
What to do if 3M Ranger 247 Medical Equipment alphanumeric display reads “Er 4” or “Open.”?
If the alphanumeric display on your 3M Medical Equipment reads “Er 4” or “Open,” it indicates an open wire on the temperature sensor. Do not use the unit.
How to fix a 3M Laboratory Equipment warming unit when nothing illuminates on the panel?
If nothing illuminates on the warming unit panel, first, ensure the unit is turned on and properly plugged into both the power entry module and a grounded outlet. Then check the fuses. If the issue persists, it may indicate a unit failure.
What to do if 3M Ranger 247 alerts sound, alphanumeric display and alert indicator light go dark?
If the alert sounds, the alphanumeric display and alert indicator light go dark on your 3M Medical Equipment, this indicates a primary controller failure, and the unit will no longer operate. Turn the unit off and unplug it. Discontinue use of the unit and discard the warming set. Note that the alert will continue to sound if you do not unplug the unit.
What to do if 3M Medical Equipment warming unit shows high temperature alert?
If the 3M Medical Equipment warming unit's alphanumeric display flashes a temperature of 43°C (Model 245) or 48°C (Model 247) or higher, along with the word “HI,” and the alert indicator illuminates with a sound, consider these possibilities: * If an extreme change in flow rates occurred, open the flow to reduce the temperature. The alerts will stop when the display reads 41°C, and the unit will be ready to use. * If the unit reached the set point temperature before the cassette was inserted, the alerts will stop when the display reads 41°C, making the unit ready for use. * If fluids were prewarmed above 42°C, turn off the unit, discontinue the infusion, and avoid prewarming fluids before using the Ranger warming unit.
Details on contacting Arizant Healthcare for technical assistance and ordering.
Critical safety information, warnings, and cautions for operating the warming unit.
Step-by-step instructions for performing the preventative maintenance on Model 245.
Procedure for testing the Model 245 unit's over-temperature alarm set points.
Procedure for testing the Model 247 unit's over-temperature alarm set points.
Solutions for common issues like no power, alarm sounds, or display problems.
Addressing advanced issues such as unit alarms on power-up or error code display.
Details on contacting Arizant Healthcare for technical assistance and ordering.
Critical safety information, warnings, and cautions for operating the warming unit.
Step-by-step instructions for performing the preventative maintenance on Model 245.
Procedure for testing the Model 245 unit's over-temperature alarm set points.
Procedure for testing the Model 247 unit's over-temperature alarm set points.
Solutions for common issues like no power, alarm sounds, or display problems.
Addressing advanced issues such as unit alarms on power-up or error code display.
| Brand | 3M |
|---|---|
| Model | Ranger 247 |
| Category | Medical Equipment |
| Language | English |












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