Fisher FSMED-74HFPL Technical & Service Manual page 18

9.8.4 Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold
wind function prevails.
Anti-cold wind control function at heating mode
Indoor exchanger temp. up
Indoor exchanger temp. down
9.8.5 Auto wind at heating mode
Room temp. up
Room temp. down
9.8.6 Indoor evaporator high-temperature protection at heating mode
Indoor exchanger temp. up
Indoor exchanger temp. down
9.8.7. The louver opens to Standard Angle ANGLHEAT when power is on for the first time
9.9 Defrosting operation (Available for heating only).
9.9.1 Defrosting condition: Defrosting starts when either of the following ①&②:
① A and B are satisfied:
A: The compressor keeps running for 40 minutes or more.
B: The temperature difference of evaporator and room temperature meets one of the
following:
② Calculate from the end of latest defrost, evaporator high temp. protection only closes
outdoor fan with the compressor still running. Add up to 90 minutes.
Condition
T= Indoor exchanger temp.
T<TE1
TE1<T<TE2
T>TE2
T> TE3
TE3<T<TE4
T<TE4
Condition
T=Indoor Temp.-Setting Temp.
T<2
T>2
T> 0
T<0
Condition
T= Indoor exchanger temp.
T<TE8
TE8<T<TE7
T>TE7
T>TE9
T<TE9
Fan speed is high
Fan speed is mid
Fan speed is low
Breeze
Indoor fan speed
Compressor
On
On
Off
Off
On
Temp. of evaporator---room temp.
≤TH
DEFROST
≤TM
DEFROST
≤TL
DEFROST
Meet only if it is Breeze
17
Indoor fan speed
Off
Breeze
Setting fan speed
Setting fan speed
Breeze
Off
High
Med.
Med.
High
Outdoor fan
On
Off
Off
Off
On