Danfoss AKC 25H1 Description

2 Function description RC.1J.Z4.02 © Danfoss 09/1999 AKC 25H1
Contents
Introduction ............................................................................................................................... 3
Operation .................................................................................................................................. 4
System information ................................................................................................................. 4
Language .................................................................................................................................. 4
Capacity regulation of compressor........................................................................................ 5
Regulation...................................................................................................................... 5
External displacement of reference ............................................................................... 5
Neutral zone and regulating band ................................................................................. 6
Compressor definition .................................................................................................... 6
Time delays for cut ins and cut outs ............................................................................... 6
Sequence for cut in and cut out of capacity ................................................................... 7
Signal from the compressor's safety controls ................................................................ 7
Hourmeter ...................................................................................................................... 8
Temperature sensor ....................................................................................................... 8
Forced control of compressor capacity .......................................................................... 8
Capacity regulation of condenser .......................................................................................... 9
Regulation...................................................................................................................... 9
Neutral zone and regulating band ................................................................................. 9
Condenser definition...................................................................................................... 9
Signal from the condenser's safety controls ................................................................ 10
Hourmeter .................................................................................................................... 10
Forced control of condenser capacity .......................................................................... 10
Overriding ...............................................................................................................................11
Monitoring ............................................................................................................... 12
Monitoring of maximum discharge gas temperature ........................................ 12
Monitoring of maximum discharge pressure .................................................... 12
Monitoring of minimum suction pressure ......................................................... 13
Monitoring of suction gas superheat................................................................ 13
Monitoring of the different parts of the compressor's safety circuit .................. 14
Monitoring of other automatic controls ............................................................ 14
Supply voltage ........................................................................................................................ 15
Function switch ......................................................................................................................15
Clock function ........................................................................................................................ 15
Refrigerant..............................................................................................................................16
Service .................................................................................................................................... 17
System measurements/data ................................................................................................18
Alarms and messages ..........................................................................................................19
Access codes ........................................................................................................................23
Supporting text ....................................................................................................................... 23
Installation considerations ................................................................................................... 23
List of literature ...................................................................................................................... 24
This function description was revised in September 1999 and applies to AKC 25H1 with code
numbers 084B2017 and 084B2018.
Validity

Danfoss AKC 25H1 Specifications

General

Brand	Danfoss
Model	AKC 25H1
Category	Controller
Language	English