PLANAR
Edition 1
March 2016
Page. 27 of 29
If when you press a button, the indicator on the controller does not light up, check the
wiring, the power supply voltage of the controller, and electrical contacts of the terminals.
Any dirt or oil should be wiped off the contacts with a clean cloth soaked in
gasoline.
If after the removal of defects the controller still does not work, it is necessary to
replace the controller. If after the replacement the cause of the fault is corrected, the old
controller is considered to be inoperable and it should be replaced. The controller can not
be repaired, it should be replaced by a new one.
If after the replacement of the controller the heater malfunction persists, check the
wiring and the CU.
5.12 Functions, Troubleshooting and Replacement of Cabin Sensor
(it is available as an option)
The cabin sensor (Figure 18) is used to measure air temperature in the area of its
installation, and it allows to maintain desired temperatures within 1
30°C.
The performance of installed sensor can be determined by the operation of the heater.
If the heater does not maintain the desired temperature:
-
measure the temperature in the sensor area and compare its value with the value
displayed on the CNTRL;
-
replace the sensor with a known good and retest.
If the heater with a new sensor is working properly, the old sensor is defective and
should be replaced. If the heater with a new sensor still does not maintain the set
temperature - check the CU.
(1 – chip; 2 – pin
connector)
Fig. 18–Cabin Sensor
Sensor performance (during heater operation) can be determined by the output
voltage.
The output voltage at 0°C - 2.73V. The voltage increases with increasing
temperature. As the temperature increases by 1°C, the output voltage will increase by 10
mV.
Attention! The cabin sensor, if installed, should be disabled, if you have to run
the heater when the air temperature is more than 30
С.