FC 3500 DC Fan Control
Document no.:150304 Version: 1.2
Page 18 of 23
Additional explanation of parameter:
6.2 Night temperature offset (P70)
During nighttime it is possible to give the set point an offset of parameter P70 (-10..10°K/-
18..18°F) degrees, which lowers the normal set point. F.i.:
Set point at 20°C, and P70=+5°K gives at nighttime a set point of (20°C - (+5°K) )= 15°C or
Set point at 20°C, and P70=-7°K gives at nighttime a set point of (20°C - (-7°K)) = 27°C.
7 Error codes
During operation the following error codes may occur;
Error code Description
Room temperature sensor failure
Water temperature sensor failure
Outside temperature sensor failure
7.1 Trouble shooting
Error codes Solution
Replace the sensor. If the problem persists, the unit may be defective
Check if there is no obstruction in the fan
Check if the power supply is connected to the fan(s)
Check the wirring to the fan(s)
Check the fan type in the parameters (F10, F20, F30, F40)
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