Sinclair SDV 6 Service Manual page 47


Determine the initial fan speed of auto fan control
The initial fan speed is determined according to the difference
between ambient indoor temperature (T1) and set temperature (TS),
and it updates in the following situations:
1) The first time enter this mode
2) TS is changed
3) When switching between normal operation and silent operation
6.4.3 Anti-cold Air Control
This function only be used in heating mode, fan speed is changed according to value changes of the heat exchanger
intermediate temperature (T2) of the heat exchanger liquid pipe temperature (T2A) and High pressure equivalent
saturation temperature (TC). While in anti-cold air mode, set temperature (Ts) is displayed normally. Anti-cold air control is
valid during the oil return or defrosting period. If the IDU is turned off, the fan is turned off as well.
Note: The switching temperature of the heat exchanger intermediate temperature (T2), the heat exchanger liquid pipe
temperature (T2A) and the condensing temperature(TC) is determined by T_fanoff.
T_fanoff is the switch temperature point between Breeze and Fan off can be adjusted by controller.
6.4.4 Standby fan speed Control

Cooling standby
The default cooling standby fan speed is Speed 1. You can change the cooling standby fan speed from speed 1 to speed 7
through the controller.
The parameter setting code is "N18".

Heating standby
The default heating standby is Termal wind speed. The speed 1 runs for 1 minute and stops for X minutes (X is the set value
by the controller) which can be set from 4 minutes (default), 8 minutes, 12 minutes and 16 minutes (The parameter setting
code is "N21") . And You can change the heating standby fan speed through the controller (The parameter setting code is
"N20").
Termal: In the heating mode, The IDU in the standby state heating mode will run fan periodically at speed 1 for one minute (the period can be set by controller)
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Speed 1
T2 or T2A/Tc
Temperature
drop
Fan off
T2 or T2A/Tc
Temperature
drop