Orcon HRC-EcoMax Series Installation Manual page 36

index
Temperature sensor fault
When a fault occurs with one of the sensors, the display and the printed circuit board
indicate which sensor is malfunctioning. See the connection diagram on page 15
for which sensor is connected to which connector. To verify whether the sensor is
defective, you can disconnect it from the connector and measure it (10 kΩ at 20°C).
If your meter indicates 0 or infinity, the sensor is defective and a new sensor needs
to be installed.
To install a new temperature sensor, see how the current sensor is mounted in the
unit. Then remove it from the housing and pull it up through the cable entry from
the unit, after disconnecting the connector from the printed circuit board. Take the
new temperature sensor and feed it through the cable entry with the metal head.
Then place the metal head in the appropriate recess: see the illustrations below. Then
clamp the rest of the cable into the recess in the housing and attach the connector to
the printed circuit board (see Chapter 4.4). Finally, route the cable through the cable
ties around the printed circuit board. The fault has now been corrected.
Viewed from the bottom
Viewed from the bottom
Humidity sensor fault
If the moisture sensor is defective, this is shown on the display. The moisture sensor may
not be properly connected to the connector. You can check the operation of the humidity
sensor by turning the unit on <AUTO> and breathing over the moisture sensor.
36