Fintek iCOOL, Technical Manual

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9.5.4 Sensor damage protection
1. Room temperature sensor damage:
If room temperature is lower than -40
ć
or higher than 120
ćˈ
room temperature sensor is supposed to
be damaged unit goes into protection mode as below and unit will display E1 be damaged, unit goes into protection mode as below, and unit will display E1.
a. Compressor will work with 20 minutes on and 5 minutes off in cooling and heating mode.
b. Compressor will work with 10 minutes on and 6 minutes off in dry mode.
c. Unit will work with fan function if unit is in auto mode.
2. Indoor coil temperature sensor damage:
If indoor coil temperature is lower than -30
ć
or higher than 90
ćˈ
indoor coil temperature sensor is
supposed to be damage unit will display E2 supposed to be damage, unit will display E2.
3. Outdoor coil sensor, room temp sensor or indoor coil sensor OPT or RT IPT sensor was damaged
In the heating mode, every time compressor runs total for 50 minutes, and then defrosts 3 minutes.
Note: When room temperature sensor and indoor coil sensor sensor are damaged same time
ˈ
unit will
display E1, and work with room temperature sensor damaged cycle.
9.5.5 Indoor PG motor problem protection
If indoor fan motor could not receive the feedback pulse for 5 seconds it would close Compressor If indoor fan motor could not receive the feedback pulse for 5 seconds, it would close. Compressor,
outdoor fan motor, valve and aux electrical heater will close same time. Indoor unit fan motor would run
again after 10 seconds, if still do not receive the speed feedback signal, unit close and display E3.
9.5.6 Refrigerant insufficient protection
After compressor running for 20 minutes in cooling mode, if indoor coil temperature • room temperature -
5 ć , and time keeps 40 minutes, unit would stop working and display E4.
After compressor running for 20 minutes in heating mode, if indoor coil temperature ” room temperature
+ 5 ć , and time keeps 40 minutes, unit would stop working and display E4.
9.5.7 Failure Error code display
If there are problems with some specified components, unit would display failure codes as below:
Failure situation Running light flash Code
Room temperature sensor 1/time E1 p
failure
Indoor coil temperature
sensor failure 2/time E2
Indoor PG Motor failure Work 1.5S/Stop 0.5S E3
Refrigerant Insufficient failure Work 1.5S/Stop 1S E4
If there are above 2 failure codes displayed same time, each failure code would be displayed with 5
seconds.