Stulz SplitAir3 SAL40 - Page 61

61 © STULZ SpA . – all rights reserved EN/39B/06.2018
SAL
6. Air flow Evaporator fan broken Contact STULZ service
Fan cables disconnected Contact STULZ service
Air flow pressure switch faulty Contact STULZ service
Wrong setting of air flow switch Contact STULZ service
Pipes to the air flow switch clogged or bended Clean and re-position plastic pipes
7. Dirty filter Air filter is clogged Replace the filter
Clogged filter pressure switch faulty Contact STULZ service
Wrong setting of clogged filter pressure switch Contact STULZ service
Pipes to the clogged filter pressure switch clogged
or bended
Clean and re-position plastic pipes
8. High pressure Condenser air recirculation Remove obstacles near the condenser air discharge.
Verify that external panels are correctly closed
Insufficient condenser air flow Check that condenser fan is free to move
Clean condenser and air openings
High pressure switch defective Contact STULZ service
External temperature higher than max limit Change unit model
9. Low pressure Refrigerant leakages Contact STULZ service
Low pressure switch defective Contact STULZ service
Obstruction of refrigerant filter Contact STULZ service
10. Antifreeze Cold air recirculation Remove obstacles near cold air supply
Insufficient evaporator air flow Check that evaporator fan is free to move
Check that air filter is not clogged. In case, replace it
Wrong calibration of evaporator temperature probe Check with a reference thermometer. Contact
STULZ service for calibration
11. High / max
temperature
Cooling capacity lower than heat load Reduce heat load or increase number of units
Bad positioning of remote temperature probe
(accessory ACTRAS)
Check and reposition probes
Wrong calibration of return air temperature probe Check with a reference thermometer. Contact
STULZ service for calibration
Low air flow Check and replace air filter (see also dirty filter alarm)
Insufficient cold air circulation in the site Check unit and racks layout
Low refrigerant charge Contact STULZ service
Compressor faulty Look for alarms on the display. Contact STULZ
service
Anomalous condensing pressure Check condenser efficiency. Contact STULZ service
12. Low / min
temperature
Too cold in the room Improve thermal insulation of the room / unit or add
external stand-alone heaters
Electric heaters faulty Contact STULZ service
13. High humidity Humidity infiltration from outside (if free cooling
module is present)
Check passage of air from the outdoor
Wrong calibration of humidity probe Check with a reference hygrometer.
Contact STULZ service for calibration
14. LAN failure Missing LAN cable Connect units in LAN with a suitable cable
LAN cable is not pin-to-pin Replace it with a pin-to-pin cable
Wrong setting of sequencing jumpers Contact STULZ service
Wrong setting of sequencing parameters Contact STULZ service
Sequencing part of C2020 controller is damaged Contact STULZ service