Customer Service Bulletins

2016_May_Turning on De-Humidification Mode
To: Cell Technicians and Service Contractors responsible for PM Service and Repair. Subject:  Turning on New Automatic De-humidification Mode Background...
Tue, Jul 11, 2017 at 11:11 PM
2015_September: Changing Cooling Set-point from 77 to 79
To: Cell Technicians and Service Contractors responsible for PM Service and Repair Subject:  Changing Cooling Setpoint Product: AIRSYS WPUs (all sizes...
Thu, Oct 8, 2015 at 7:30 PM
2015_July: Resolving High Humidity for Low Heat Load Sites
To: Service Contractors responsible for PM Service and Repair Subject: Resolving high indoor humidity issues in cell sites Product: AIRSYS WPUs (all m...
Mon, Nov 9, 2015 at 12:27 PM
2014_June: Damper Actuator Alarm (A24/25): Increasing alarm tolerance
To: Service Contractors responsible for PM Service and Repair Subject: Increasing alarm tolerance for temperature differential Product: AIRSYS WPUs (all ...
Tue, Mar 29, 2016 at 11:51 AM
2014_May: Emergency Wiring Instruction
To: Service Contractors responsible for PM Service and Repair and Cell Technicians Subject: Achieving temporary mechanical cooling without controller in...
Sat, Sep 26, 2015 at 10:18 PM
2014_May: Disabling Free Cooling Mode
To: Service Contractors responsible for PM Service and Repair Subject: Turning off Free Cooling (FC) functionality of AIRSYS WPUs Background: In sev...
Tue, Sep 22, 2015 at 4:29 PM
2013_August: Generator Run Alarm Setting Change
RE:  This bulletin is to notify Shelter OEMs, AIRSYS Authorized service companies, and VzW field personnel with New Build AIRSYS HVAC equipment, that th...
Tue, Sep 22, 2015 at 4:20 PM
2013_March: Compressor Shipping Bracket Removal
RE:  Ensuring the Compressor Shipping Brackets are removed from AIRSYS HVAC units on New Build cell sites AFTER they are delivered to their site location ...
Tue, Sep 22, 2015 at 4:14 PM
2013_March: AIRSYS Alarm Output Wiring Recommendations
RE:  Software Revision 13B37 has been shipping in AIRSYS controllers since Nov 2012 and does not map alarm outputs that correspond directly with the new ...
Tue, Sep 22, 2015 at 4:13 PM
2021_Dec: Replacing Compressor and Inverter Driver on 11V1B & 11V1T Single Phase UNICOOL Model
SUBJECT Ordering compressor and inverter driver(variable frequency drive) for UNICOOL 11V1B3MR410AAC & 11V1T3MR410AAC SCOPE Service contractors re...
Fri, Oct 7, 2022 at 11:00 AM