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TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
CONTROLLER
Power and Tank Sensor Connections
Sensors
Four independent temperature sensors (thermistors) are utilised in the heat pump module.
The sensors are identified as follows:
Tank sensor
Evaporator sensor
Compressor sensor
Heat exchanger water outlet sensor
The sensors are monitored by the controller and provide information on specific
temperatures. This information is utilised to determine heater operation.
For more information on the sensors refer to the Sensor Testing section on page 48.
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