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SIM Inverter Monobloc Air-to-Water Heat Pump
Settings > Factory > Passcode ‘’22’’ > Unit State
Unit State Submenu
Allows the user to see the current state of certain items. By selecting the appropriate top menu, the user can see how the unit is
currently operating. See below chart for each item a user can monitor.
Unit State Menu
Top Menu Number Name Possible Options Description
Load
Status
O01 Compressor On/Off Status of the Compressor
O02 Water Pump On/Off Status of the Primary Circulator
O03 4-Way Valve On/Off Status of the Reversing Valve. ON is Heating, OFF is Cooling
O04 Fan motor On/off Status of Fan motor(s)
O06 Antifreeze heat strip On/Off Status of the Condensate Pan heater
O07 Crank Antifreeze Heat Strip On/Off Status of the Compressor Crankcase Heater
O08 Spray valve On/Off Not available for this unit
O09 Auxillary Electric Heater On/Off Status of the Auxiliary Electric Heater output
O11 Alarm On/Off Status of the Alarm output
O12 Hot Water Pump On/Off Status of the DHW pump circulator
O13 3-way Valve On/Off Status of DHW diverter valve. ON is DHW, OFF is space conditioning circulation
O14 Eev Steps 0-480 Electronic Expansion Valve steps of capacity, out of 480
Switch
Status
S01 High Pressure Open/Closed
High Pressure protection switch. Closed indicates normal operation. Open indicates
the switch is tripped on High Pressure, 638 PSIG, 4.4 MPa.
S02 Low Pressure Open/Closed
Low Pressure protection switch. Closed indicates normal operation. Open indicates
the switch is tripped on Low Suction Pressure, 2.1 PSIG, 0.15 MPa
S03 Flow Switch Open/Closed
Water ow switch. Closes when minimum ow is achieved, Approximately 4.5 GPM for
the SIM-036, 7.0 GPM for SIM-060. Opens when ow is lost or falls below this value
S04 Remote Switch Open/Closed Remote On/Off, open is Standby, Closed is Unit Enabled
S05 Mode Switch Open/Closed Remote Heat/Cool selection, Open is Cooling, Closed is Heating
S06 DHW On/Off Open/Closed Indicates DHW enabled by an external switch
S07 Electric Heater Overload Open/Closed
Auxiliary Electric Heater Safety Switch. Closed allows normal heater operation, Open
indicates the safety tripped on water overtemp and Aux Heat output is prevented.
S08 Heat/Cool On Off Open/Closed
Indicates Space Conditioning modes, Heating or Cooling, are enabled. Whether or not
the compressor is active
Temp
Status
T01 Inlet Water Temp °F / °C Return water temp
T02 Outlet Water Temp °F / °C Supply water temp
T03 Exhaust Temp °F / °C Compressor discharge temp
T04 Water Tank Temp °F / °C DHW Tank temperature
T05 Suction Temp °F / °C Compressor Suction Temperature
T06 Coil Temp °F / °C Outside Coil surface temperature
T07 Ambient Temp °F / °C Outside Air temperature
T08 Suction Pressure PSI Compressor Suction Pressure
T09 Exhaust Pressure PSI Compressor Discharge Pressure
T10 Actual Frequency Hz Running frequency of compressor
T11 Set Frequency Hz Target frequency compressor/control is attempting to achieve
T12 Speed of fan1 motor RPM's Operating speed of Fan Motor 1
T13 Speed of fan2 motor RPM's Operating speed of Fan Motor 2 (if applicable)
T14 Suction Overheat °F / °C Calculated Suction Superheat
T15 Exhaust Overheat °F / °C Calculated Discharge Superheat
T16 Module Temp Protect Value °F / °C
Overtemp protection Setpoint of the Inverter Board chip. Set by Inveter Board. Actual
Measured Value is T21
T17 AC Input Voltage V Measured input voltage to unit
T18 AC Input Current A Measured current that unit is using
T19 Compressor phase current valid value A Three phase current provided to the Compressor motor from the Inverter Board
T20 Bus Voltage Value V Three phase voltage provided to the Compressor motor from the Inverter Board
T21 IPM/PIM module Actual Temp °F / °C Inverter board chip temperature. Shuts the compressor off if temperature is excessive.
T22 Target Speed of Fan Motor RPM's Target operating speed of Fan Motor(s)
T23 Target Temp after AT compensation °F / °C
Target temperature that the unit is driving to under current condtions according to the
Outdoor Reset (ODR) Settings
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