REFTHEREFRIGERATION TECHNOLOGY
TECHNICAL OFFICINE / Drives

Find the route.
Follow the verification.

An operating center for refrigerators and maintenance: parts from the problem, identify the drive, find the exact source and follow the controls in order.

CENTRO OPERATIVO / PARTENZA RAPIDA

Tell me where you're still.

Enter the real problem. Each path keeps model, state, measures and source before proposing the next verification.

21 routes32 Official PDF10 trademark3 levels
01Identifyingmodel · firmware · application
02Conservationcode · time · cycle stage
03Comparecommand · reference · status
04Measuresonly with suitable tools and skills
05Confirmationproven cause · final verification · outcome

What do you want to leave?

21 routes · 3 levels

The level organizes reading, does not allow to intervene. With a selected family, the cases of other families are excluded; the general routes remain indicated as method.

21 routes available

ATV320

OCF: overcurrent on ATV320

The drive signals an excessive current. The code does not show itself a failure of the Drives: it is necessary to distinguish start, regime and stop.

Alarm
ATV320

SCF1: distinguish engine circuit and configuration

SCF1 reports a short circuit event. The Schneider FAQ also considers wiring, engine characteristics and adjustment data: does not authorize to declare failure the power stage from the code only.

Alarm
ATV320

ObF: alarm during deceleration

The Schneider source associates ObF with too fast braking, dragging load or high power. The choice of correction depends on the process and hardware installed.

Alarm
ATV320

OHF: high drive temperature

OHF covers the superheat of the drive. It is distinguished from the thermal protection of the engine: the framework context and the load are part of the diagnosis.

Alarm
ATV320

SLF1: loss of local Modbus communication

In the manual ATV320 SLF1 identifies the interruption of the local Modbus serial communication. It is not the generic code for all networks and all options.

Communication
ATV630 · configuration described in the FAQ

ATV630 ready, but RUN on the terminal does not start

A ready drive does not necessarily receive the command from the terminal. The ATV630 FAQ distinguishes control from clamps and HMI control; the local/remote key may not be enabled.

Command
ATV630 · configuration described in the FAQ

nSt on ATV630: check the stop command

The ATV630 FAQ describes a case of free wheel stop in three-wire control: the opening of the stop entry leads to nSt. It should be read the real configuration, not applied a universal scheme.

Command
ATV320 / ATV600 / ATV212

SoMove: connection, DTM and configuration

SoMove and the DTM library are distinct elements. The DTM must match the family; connection and compatibility must be verified in official documentation.

Software
General method · no equivalence between codes

I don't know the model. Where do I start?

The first solution is to identify the device. Mark and power are not enough: serve complete reference, voltage, firmware and type of engine.

Foundations
General method · no equivalence between codes

The reference changes but the speed does not follow

Separate process request, received signal, active reference and output of the drive. A percentage value on the controller does not show what the Drives receives.

Regulation
General method · no equivalence between codes

The compressor turns but the capacity fridge is low

The output frequency is a given of the system, not a measure of the cooling capacity. The verification must connect request, drive and circuit conditions.

Refrigeration
General method · no equivalence between codes

Replacement and commissioning: minimum dossier

Replace a drive is not equivalent to copying few values. Power, motor, options, control and safety functions must remain consistent with the machine.

Commissioning
FC 103 · software and revision to be confirmed

FC 103: read warnings and alarms before reset

The code is only the starting point: status, alarm log, process conditions and software review serve to distinguish cause, consequence and stored block.

Diagnosis Danfoss
CDS 803 · 6–30 kW · compatible software

CDS 803: from code to targeted verification

The CDS 803 distinguishes warning, alarm and triple locked. Each code must be connected to size, software, compressor status and electrical conditions before reset.

Compressor diagnostics
CDS 803 · open/closed loop · mandatory OEM limits

CDS 803: the compressor does not complete start-up

A failure to start can depend on control circuit, engine data, speed limit, feedback or mechanical block; the sequence changes between open and closed ring.

Commissioning
ACH580 · HVAC program · hexadecimal codes

ACH580 ready but not part: permissive and interlock

The codes indicate run enable, run permissive or start interlock missing: the drive can be healthy but correctly blocked by the logic machine.

Command and permissive
ACH580 · fault 2310 · manual hardware variant

ACH580 2310: overcurrent

The output current exceeded the internal limit. The code does not distinguish itself from load, ramp, engine data, wiring or insulation.

Alarms ABB
ACH580 · fault 2330/2340 · separate motor circuit

ACH580 2330 / 2340: dispersion or short circuit

2330 oriented towards a ground dispersion; 2340 towards a short circuit in the engine or cables. The test must exclude the drive from the measuring circuit.

Motor circuit
ATV320 · USF · FAQ and manual of the installed revision

USF: insufficient power supply or transient decrease

ATV320 signals too low network voltage or a transient fall. It is necessary to distinguish the plant event from an internal condition before changing thresholds.

Power supply
Practical guides / PRIMARY SOURCES

Practical guides Practical Manufacturers

6 Practical guides · Danfoss, ABB, Schneider Electric

Each guide starts from a precise family and indicates revision or section of the source. Do not transfer parameters, thresholds or tests to another drive or compressor.

6 Practical guides verified available

Danfoss · FC 103

Return oil at low speed

How to read the Oil Return Management function without transferring times and frequencies from one compressor to another.

Programming Practical guides · Section 3.22.1 · Printed pages 188–190Open the verified guide →
Manual library / PRIMARY SOURCES

Manual library Drives and compressors

32 official PDFs from Danfoss, BITZER, Copeland, ABB and Schneider Electric. Recontrolled connections on 16 October 2026. Check reference, size, firmware and options. Italian and English revisions may differ: the revision number is shown on the manufacturer's page.

32 documents available

Danfoss · FC 103

Installation and operation

Manual · EN · FC103-OPER

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Danfoss · FC 103

Programming and parameters

Programming · EN · FC103-PROG

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Danfoss · FC 103

Design and integration — 2015 edition

Design · EN · FC103-DESIGN

Previous generation document: verify applicability to the installed drive.

Open official PDF

Danfoss · CDS 803

Installation and operation

Manual · EN · CDS803-OPER

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Danfoss · CDS 803

Drive design for compressors

Design · EN · CDS803-DESIGN

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Danfoss · CDS 803

Programming and parameters

Programme · EN · CDS803-PROG

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

BITZER · VARIPACK

Operating instructions IP20 / IP55 / IP66

Manual · DE / EN / FR · CB-110-4

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

BITZER · VARIPACK

Quick installation IP55 / IP66

EN / DE / FR · CB-111-3

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

BITZER · BEST / VARIPACK

BEST: connection and use of service tools

Software · DE / EN · CT-311-5

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

BITZER · VARIPACK

Drives range for compressors — technical presentation

Catalogue · EN · CP-110-1

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Copeland · EVM

EVM installation

Manual · EN · EVM-INSTALL

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Copeland · EVH

Installation EVH

Manual · EN · EVH-INSTALL

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Copeland · EVM

Quick Start Guide

Starting · EN · EVM-QUICK

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Copeland · EVM / EVM-Pro

Application Manual and Diagnostic EVM / EVM-Pro

Programming · EN · AE-1456

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

Copeland · EVH

Technical manual EVH triphase

Programming · EN · EVH-TECH

Edition for voltages 208–230 / 480 / 575 V: do not transfer data to different European variants.

Open official PDF

Copeland · A*V

Drive for alternative variable speed compressors

Application · EN · AE8-1437

Compressors: Check model, size, firmware and combinations approved by the manufacturer.

Open official PDF

ABB · ACH580

Starting of the HVAC program

Starting · EN · 3AXD50000047658

HVAC and integration: verify OEM compressor requirements; FMBT-21 module requires compatible hardware.

Open official PDF

Official page and reviews i
ABB · ACH580

Module FMBT-21 Modbus/TCP

Communication · EN · 3AXD50000158607

HVAC and integration: verify OEM compressor requirements; FMBT-21 module requires compatible hardware.

Open official PDF

Official page and reviews i

For the refrigerator circuit: Operating manual Danfoss FC 103 (EN) e. Check compressor and machine constraints separately.

SOFTWARE / CONFIGURAZIONE

SoMove and DTM: two elements to align

Identifies family, firmware, interface and software version. Before transferring parameters, keep the configuration read and compare it to the approved one.

DIECI MARCHI / ACCESS TO THE SOURCE

Another family? Start with his builder.

This directory keeps access to the resources of other brands. Schneider cases of this page do not interpret their fault codes.