w w w . i n n o v a i r . c o m
DELUXE
Inverter
Service
M
anual
(13) F5 -Compressor top head sensor error
Explanation of
error
Cause:
The compressor top head sensor is a compressor top head temperature
protection switch most of the time. It keeps closed (short circuit) when the
compressor temperature is normal and switches off (open circuit) when the
temperature is too high. The main external control panel will indicate
“compressor top head sensor error” when it senses disconnection of the
compressor top head protection switch.
Inspection path:
Compressor top head sensor (temperature protection
switch)→Sensor wire→Connectors→Main external control panel
Tools required
for inspection
Pressure gauge, multimeter
Frequent
problematic part
System pressure, liquid deficiency, compressor top head sensor (temperature
protection switch), main external control panel
Inspection
procedure and
key points
1. First check if the compressor top head temperature is too high (above 110
℃
)
and causes action of the compressor top head sensor (temperature protection
switch)
. Possible r
easons why the compressor top head temperature is too high:
the system is deficient in liquid and the compressor idles; the system is blocked
and the pressure of the compressor is too high.
2. After excluding the possibility of the system problem, please note that the
temperature protection switch is closed normally. Test if the terminals of the
sensor are in the short-circuit condition with the multimeter. In case of
an
open
circuit, then there is something wrong with the sensor or lead wires.
3. Check if the sensor wire or the sensor connecting wire is damaged.
4. Check if the connecting terminal is connected firmly, the weld between the
terminal and the main control panel is loose; pull the terminal slightly for
inspection if necessary.
5. Disconnect the power supply and short circuit a metal with the compressor
top head terminal of the main external control panel. If the compressor top head
sensor error disappears after start up, then replace the sensor; if the error still
occurs, it’s probably the main control panel problem,
then
replace the main
external
control panel.
Special attention
The compressor top head sensor is just a temperature switch which is highly
reliable and is
, generally,
less likely to
be damaged
. Pay more attention to the
system pressure and the compressor temperature.
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