Unit Lockouts - Bosch SM Series Installation, Operation And Maintenance Manual

SM Split AH/AV Air Handler Troubleshooting | 25

Unit Lockouts

Periodic lockouts almost always are caused by air
or water flow problems. The lockout (shutdown) of
the unit is a normal protective measure in the
design of the equipment. If continual lockouts
occur call a mechanic immediately and have them
check for: water flow problems, water
temperature problems, airflow problems or air
temperature problems. Use of the pressure and
temperature charts for the unit may be required to
properly determine the cause.
Subject to change without prior notice
SM Split AH/AV Air Handler 8733826256 (2020/06)