Friedrich FPHFC36A3B Wi-Fi Service & Parts Manual page 67

Control Logic Description
Auto Mode
This mode can be chosen with remote controller and the setting temperature can be changed
between 61°F~86°F(16°C~30)
In auto mode, the unit will choose cooling, heating or fan -on ly mode according to
=T1 -Ts).
Indoor fan will run at auto fan of the relevant mode. The louver operates same as in relevant
mode. If the compressor keeps stopping for 10 minutes or the setting temperature is modified
the machine will choose mode according to T again.
Evaporator Low -tem perature Protection
DC -Inverter
AC will enter T2 protection if any of the following condition is satisfied.
Condition:
Cooling mode : When the indoor coil temp. T2 keeps lower than TE5 for 120 seconds ,
the compressor and outdoor fan will shut off. When T2 is higher than TE6 , the
compressor and outdoor fan will restart.
67
OPERATION
.
T=T1 -Ts
T＞3 7°F(3°C)
27°F(-3 ) ≤ T≤ 37°F(3°C)
T ＜27°F(-3°C)
T2
On
TE6
TE5
Runni ng mode
Cooling
Fan -only
Heating
Off
T ( T
,