46 | Maintenance SM Series Heat Pump
SM Series Heat Pump6 720 220 406 (2013/1) Subject to change without prior notice
3. Lubrication of the blower motor is not
required, however may be performed on some
motors to extend motor life. Use SAE-20 non-
detergent electric motor oil.
4. The condensate drain should be checked
annually by cleaning and flushing to insure
proper drainage.
5. 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,
air flow problems or air temperature problems.
Use of the pressure and temperature charts for
the unit may be required to properly determine
the cause.
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