Johnson Controls Quantech Millennium QCC3080CZE Installation Operation & Maintenance page 7

FORM QCC3-NM1
ISSUE DATE: 12/19/2023
Section 9: Service and troubleshooting ............................................................................................................149
Clearing history buffers................................................................................................................................. 149
Service mode outputs ................................................................................................................................... 149
Service mode condensing unit configuration ................................................................................................ 150
Service mode analog and digital inputs ........................................................................................................ 150
Control inputs and outputs ........................................................................................................................... 151
Checking inputs and outputs ........................................................................................................................ 153
Optional printer installation ........................................................................................................................... 157
Section 10: Maintenance.....................................................................................................................................161
Important ...................................................................................................................................................... 161
Compressors oil level check ......................................................................................................................... 161
Oil analysis ................................................................................................................................................... 161
Condenser fan motors .................................................................................................................................. 161
Condenser MCHX ........................................................................................................................................ 161
Microchannel coil cleaning ........................................................................................................................... 161
Cleaning procedure required for standard and environment guard microchannel coils ............................... 162
Cleaning procedure for environment guard premium microchannel coils .................................................... 162
Steps to touch-up small sections of finned coil surface ................................................................................ 163
Steps to touch-up end (dead) tubes and condenser coil headers: ............................................................... 163
Materials required: ........................................................................................................................................ 163
Chilled liquid system maintenance ............................................................................................................... 164
Scheduled maintenance ............................................................................................................................... 164
Chiller / compressor operating log ................................................................................................................ 164
Evaporator freeze damage ........................................................................................................................... 164
Glycol concentration ..................................................................................................................................... 164
Winterization ................................................................................................................................................. 164
Before applying power to the chiller, ensure the chilled liquid system is filled ............................................. 164
Removing water/glycol from the evaporator ................................................................................................. 165
Operating parameters .................................................................................................................................. 165
On-board battery backup .............................................................................................................................. 165
Brazed plate heat exchanger (evaporator) heater ........................................................................................165
Overall unit inspection .................................................................................................................................. 165
BAS control .................................................................................................................................................. 166
BACnet and Modbus data communication ................................................................................................... 169
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Table of contents (cont'd)
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