Fuji Electric FRENIC-Mini Error Er-2: Remote keypad communications error

FRENIC-Mini inverter · taken from the manufacturer’s manual, pages cited

Alarm codeEr-2

Remote keypad communications error happens if the connection between the remote keypad and inverter is broken, noisy, or the keypad itself fails. The manual's first action is: “Check continuity of the cable, contacts and connections. → Replace the cable.”

Model
Fuji Electric FRENIC-Mini
Display shows
Remote keypad communications error (Er-2)
Type
Alarm code
Source
Manual p. 147

What Er-2 means

Remote keypad communications error p. 147

Common causes

  • (1) Break in the communications cable or poor contact. p. 147
  • (2) A high intensity noise was given to the inverter. p. 147
  • (3) The remote keypad malfunctioned. p. 147
  • (4) The RS-485 communications card malfunctioned. p. 147

What to do

  1. Check continuity of the cable, contacts and connections. → Replace the cable. p. 147
  2. Check if appropriate noise control measures have been implemented (e.g., correct grounding and routing of control and main circuit wires). → Improve noise control. For details, refer to "Appendix A" of the FRENIC-Mini User's Manual. p. 147
  3. Check that alarm Er-2 does not occur if you connect another remote keypad to the inverter. → Replace the remote keypad. p. 147
  4. Check that alarm Er-2 occurs even if you connect another remote keypad to the inverter. → Replace the card. p. 147

Before you service the product, read the safety instructions in the manual p. 4.

If Er-2 is still not resolved

  • Contact service / dealer p. 4
    “ii„ Safety precautions Read this manual thoroughly before proceeding with installation, connections (wiring), operation, or maintenance and inspection.”
  • Contact service / dealer p. 29
    “CAUTION: When wiring the inverter to the power supply of 500 kVA or more (50 kVA or more for the single-phase 115 V class series of inverters), be sure to connect an optional DC reactor (DCR).”
Open the manual at page 147 All FRENIC-Mini error codes Manual details & download

This page summarises what the manufacturer’s manual says about Er-2; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Fuji Electric. Found a mistake? Report an error.