Temperature Detection Circuit - Hitachi RAM-90QH5 Service Manual

8. Temperature Detection Circuit

The outdoor units (this model) provides with the outdoor temperature thermistor, DEF (defrost) thermistor,
G
OH (overheat) thermistor and electric expansion valve thermistor so that they detect the temperatures of the
unit and control the system.
The circuit of the thermistors is shown as Fig. 8-1 for model RAM-90QH5 and their roles and temperature
G
measuring points are shown as Table 8-1.
Fig. 8-1 Temperature Detection Circuit
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