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System (ES990LVP and ES50LVP) ........................................................................................................ 22
Cool CFM (ES90LVP) ............................................................................................................................ 23
Cool CFM (ES50LVP) ............................................................................................................................ 23
SEQUENCE OF OPERATION ........................................................................................... 24
Full Modulation ................................................................................................................................... 24
Step Modulation ................................................................................................................................. 24
Basic Modulation Mode ...................................................................................................................... 25
Cooling Mode (Modulation, Step and Basic) ...................................................................................... 25
Dehumidification ................................................................................................................................. 26
............................................................................................................................................................ 26
Fan Mode ............................................................................................................................................ 26
Constant Low Fan Circulation ............................................................................................................. 26
Freeze Protection ................................................................................................................................ 26
Pump Exerciser .................................................................................................................................... 27
SERVICE AND MAINTENANCE ....................................................................................... 27
Filter .................................................................................................................................................... 27
Coils ..................................................................................................................................................... 27
Fan and Motor .................................................................................................................................... 27
Control and Blower Assembly Removal .............................................................................................. 27
TROUBLESHOOTING .................................................................................................... 28
Thermostat call error .......................................................................................................................... 28
External pump does not run ............................................................................................................... 28
External pump is noisy at start-up ...................................................................................................... 28
Water heater temperature and pressure relief valve is weeping ...................................................... 28
Insufficient or no heat ......................................................................................................................... 29
Cold water at hot faucet ..................................................................................................................... 29
Fan runs for cooling but not for heating ............................................................................................. 29
Heating during standby mode ............................................................................................................ 29
WARRANTY ................................................................................................................ 29
All technical information subject to change without notice.
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