Fisher FSFIF-121AE2, Service Manual

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Electrical Control Function
122 Electrical Control System
1.3.3.4 High evaporator coil temp.T2 protection:
TEstop
T2
Resume
Off
Decrease
TEdown
TEnorm
Hold
Off: Compressor stops.
Decrease: Decrease the running frequency to the lower level.
Hold: Keep the current frequency.
Resume: No limitation for frequency.
.
1.3.4 Auto-mode
This mode can be chosen with remote controller and the setting temperature can be changed between
17~30
℃
.
In auto mode, the machine will choose cooling, heating or fan-only mode according to ∆ T ( ∆ T =T1-Ts).
∆ T=T1-Ts Running mode
∆ T
＞
2
℃
Cooling
-2< ∆ T ≤ 2
℃
Fan-only
∆ T ≤ -2 ℃
Heating
Indoor fan will run at auto fan of the relevant mode.
The louver operates same as in relevant mode.
If the machine switches mode between heating and cooling, the compressor will keep stopping for 15
minutes and then choose mode according to T1-Ts.
If the setting temperature is modified, the machine will choose running function again.
1.3.5 Drying mode
Indoor fan speed is fixed at breeze and can’t be changed.
All protections are active and the same as that in cooling mode.
Low indoor room temperature protection
In drying mode, if room temperature is lower than 10
℃
, the compressor will stop and not resume until room
temperature exceeds 12
℃
.
1.3.6 Timer function
1.3.6.1 Timing range is 24 hours.
1.3.6.2 Timer on. The machine will turn on automatically when reaching the setting time.