Airwell YDAX-035H-09M25, Technical Manual

Page: 99 / 144

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 Page 99 
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
TP Compressor discharge temperature
Tsc Adjusted setting temperature
In this manual, such as CDIFTEMP, HDIFTEMP2, TCE1,
TCE2...etc., they are well-setting parameter of EEPROM.
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 nine seconds, 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
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 sensor is
lower than setting temperature.
Sensor redundancy and automatic shutoff
• If one temperature sensor malfunctions, the air
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
Compact Cassette
Super-slim Cassette
Operation
indicator
Electric heating
indicator
( some models)
Timer
indicator
PRE-DEF indicator
(pre-heating/defrost)
Alarm indicator
When wireless control
feature is activated
( some models)
LED display
1.4 Fan Mode
When fan mode is activated:
• The outdoor fan and compressor are stopped.
• Temperature control is disabled and no temperature
setting is displayed.
• The indoor fan speed can be set to 1%~100%, or low,
medium, high and auto.
• The louver operations are identical to those in cooling
mode.
• Auto fan: In fan-only mode, AC operates the same as
auto fan in cooling mode with the temperature set at
24°C.
1.5 Cooling Mode
1.5.1 Compressor Control
Reach the configured temperature:
1) When the compressor runs continuously for less than
120 minutes.