µAM - Controller Carel - Free user manual and instructions
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| Product Type | Controller |
| Brand | Carel |
| Model | µAM |
| Application | HVAC/R control (refrigeration, air conditioning) |
| Power Supply | 24 VAC/DC ±10% |
| Power Consumption | 5 VA max |
| Display | LED indicators (optional LCD via remote) |
| Inputs | 2 NTC/PTC probes (temperature) |
| Outputs | 4 relay outputs (compressor, fan, defrost, alarm) |
| Communication | RS485 (Modbus) optional |
| Dimensions (W x H x D) | 100 x 60 x 30 mm |
| Weight | 150 g |
| Protection Rating | IP65 (front panel only) |
| Operating Temperature | -10 to 55 °C |
| Storage Temperature | -20 to 70 °C |
| Functions | Temperature control, defrost cycles, alarm management, real-time clock |
| Maintenance | Keep clean and dry; no user-serviceable parts |
| Safety | Overvoltage and short-circuit protection on outputs |
| Spare Parts | Contact authorized Carel distributor |
| Repairability | Repairable by certified service centers |
| Manual Language | English, Italian, and others available online |
Frequently Asked Questions - µAM Carel
How do I reset the controller to factory defaults?
Press and hold the UP and DOWN keys simultaneously for 5 seconds until the display shows 'rES'. Confirm with the SET key.
What is the default set point temperature?
The default set point is 2 °C for refrigeration applications. Adjust via parameter 'SES'.
How do I configure the defrost cycle?
Access the parameters menu and set 'dEF' for defrost interval (hours) and 'dFd' for duration (minutes). Enable via 'dS'.
Why is the controller showing an 'E1' error?
Error 'E1' indicates a faulty probe. Check the NTC sensor connection and replace if necessary.
Can I use the controller with a remote display?
Yes, the µAM supports an optional remote display via the RS485 connection.
What is the maximum ambient temperature for operation?
The controller can operate in ambient temperatures up to 55 °C.
How do I adjust the hysteresis?
Set parameter 'HYS' to the desired value (default 0.5 °C). This controls the temperature differential.
Is there a manual override for outputs?
Yes, you can manually force outputs on/off via the 'tSt' menu for testing.
What type of probe is compatible?
The controller accepts NTC or PTC probes. Use Carel part numbers for best performance.
How do I lock the keyboard?
Set parameter 'LOC' to 1 to lock keys, preventing accidental changes.
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USER MANUAL µAM Carel
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Product information
Brand : Carel
Model : µAM
Category : Controller