Operation Modes And Functions; Abbreviation; Safety Features; Display Function - Fisher FSAIF-CP-91AE3 Technical Manual

1. Operation Modes and Functions

1.1

Abbreviation

Unit element abbreviations
Abbreviation Element
T1 Indoor room temperature
T2 Coil temperature of evaporator
T3 Coil temperature of condenser
T4 Outdoor ambient temperature
Tsc Adjusted setting temperature
TP Compressor discharge temperature
1.2

Safety Features

Compressor three-minute delay at restart
Compressor functions are delayed for up to ten seconds
upon the first startup of the unit, and are delayed for up
to three minutes upon subsequent unit restarts.
Automatic shutoff based on discharge temperature
If the compressor discharge temperature exceeds a certain
level for a period of time, the compressor ceases operation.
Automatic shutoff based on fan speed
If the indoor fan speed registers below 200RPM or over
2100RPM for an extended period of time, the unit ceases
operation and the corresponding error code is displayed on
the indoor unit.
Inverter module protection
The inverter module has an automatic shutoff mechanism
based on the unit's current, voltage, and temperature.
If automatic shutoff is initiated, the corresponding error
code is displayed on the indoor unit and the unit ceases
operation.
Indoor fan delayed operation
• When the unit starts, the louver is automatically
activated and the indoor fan will operate after a period
of setting time or the louver is in place.
• If the unit is in heating mode, the indoor fan is
regulated by the anti-cold wind function.
Compressor preheating
Preheating is automatically activated when T4 is lower
than setting temperature.
Sensor redundancy and automatic shutoff
• If one temperature sensor malfunctions, the air
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conditioner continues operation and displays the
corresponding error code, allowing for emergency use.
• When more than one temperature sensor is
malfunctioning, the air conditioner ceases operation.
1.3

Display Function

Unit display functions
Display
Temperature
value
(3s)
(3s)
(A)
(B)
(C)
Function
ECO function (available
on select units only)
when Wireless
Control feature is
activated(some units)
Temperature
Timer ON is set.
Activation of , Fresh,
Swing, Turbo, ECO,
Breeze away, ECO
intelligent or Silence
Timer OFF is set.
Cancellation of Fresh,
Swing, Turbo, ECO,
Breeze away, ECO
intelligent or Silent
Defrost
Active Clean (For
Inverter split type) or
self-cleaning(For Fixed-
speed type)
Heating in room
temperature under 8°C