WAKL5N0802A
Edition: 07.02.2022
Page: 2/18
Contents
Page:
Introduction
........................................................................................................................
3
Information on the operating instructions
.........................................................................
4
Directives for Installation, Connection and Use
................................................................
5
1.Technical data ......................................................................................................................5
1.1.
Air conditioning units ........................................................................................................5
1.2.
Pressure Switches ...........................................................................................................5
2.Maintenance plan .................................................................................................................5
2.1.
Overview of maintenance parts 2
nd
generation ..................................................................6
2.2.
Overview of maintenance parts 3
rd
generation...................................................................6
3.Maintenance of the refrigerant circuit .................................................................................7
3.1.
Check of refrigerant level in the sight glass of the roof unit ................................................7
3.2.
Leakage test with an electronic leak detector ....................................................................7
3.3.
Cleaning of condenser coil ...............................................................................................7
3.4.
Check of the refrigerant receiver for corrosion ...................................................................8
3.5.
Replacement of filter dryer
– functional test of low pressure switch ....................................8
3.6.
Function check of high pressure switch (8)......................................................................10
3.7.
Check of screw connections on compressor for tightness ................................................11
3.8.
Fresh air / recirculation air filter check for contamination, if necessary replace .................11
3.9.
Oil level check of the compressor at the oil sight glass ....................................................12
3.10.
Compressor oil exchange ...............................................................................................12
4. Maintenance work on the electrical installations .............................................................13
4.1.
Function check of the condenser fans .............................................................................13
4.2.
Function check of the evaporator blowers .......................................................................14
4.3.
Visual check of safety fuses............................................................................................14
4.4.
Plug connection check for tightness ................................................................................14
4.5.
Visual check of electrical cables for abrasion ..................................................................14
4.6.
Check the control ...........................................................................................................15
5.Repair instructions for UL500 EM/ UL700 EM ...................................................................15
5.1.
Demounting and mounting of evaporator blowers............................................................15
5.1.1.
Demounting evaporator blowers .....................................................................................15
5.1.2.
Mounting evaporator blowers..........................................................................................16
5.2.
Demounting and mounting of the flap servo-motors.........................................................16
5.4.
Mounting and demounting of the condenser fans ............................................................18
6.Warranty Conditions ..........................................................................................................18
7.Waste disposal in accordance with legal provisions ........................................................18
8.History of modification.......................................................................................................18
Appendix:
