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2 1 CONTENTS 1 Contents How to use this manual Introduction Models available To be used in heat pump 2 steps configurations together with ECH 211. ECH 200 family is a range of compact devices that permit to EXP211. Expansion module for ECH200 to control An Invensys Company. Turn the unit ON and OFF. Press also once to reset all manually reset alarms not currently active; all the alarm events per hour will also be reset even if the Turn the unit ON and OFF, Press once to reset all manually reset alarms not currently active; all the alarm events per hour. xThis manual is designed to permit quick, easy reference with the following features: Energy 211B:2 step heat pump + ext. proport. fan +modbus. Expansion EXP200 is available for only model Ech 211. This manual and its contents remain the sole property of Invensys Controls Italy s.r.l. and shall ECH 200 Electronic Controller for mono- and bi- Compressor Chillers ANALOG OUTPUT + MODBUS MW320030 ECH 211 2-STEP, HEAT PUMP MW320032 ECH 211B 2-STEP,Invensys. 1/68. 1.1. List of alarms. List of alarms. When an alarm is triggered, two things occur value of parameter Pa A02, after which manually reset;.