Service Manual
24
Installation and Maintenance
10.4.3 After simultaneously pr button and – button for continuously 3 seconds, all buttons on display board will be
shielded. Later if you press any of the buttons, the buzzer will sound once while the dual-8 will display “LC” for three times and
then return to normal display to indicate the user that the button has been locked. When pressing these two buttons
simultaneously again, the shielding function will be canceled and display will resume normal status.
10.5 Function button
When unit is turned on, functions of auto, drying, fan, timer, purifying, setting and room temperature setting can be shifted
orderly. If any of the character flashes, it means this function can be set by pressing set +, set -. During X-fan operation, press
this button to turn off the unit directly. When unit is off and not under X-fan status, press function button to directly set timer on.
When unit is off and not under X-fan status, every time you press function button, timer and cleaning can be shifted orderly. If
any of the character flashes, it means the corresponding function can be set by pressing set +, set -. Confirmation is made if
there is no operation changed within 5 seconds after setting is done.
10.6 Fan speed button
(Under drying and auto drying, this button is invalid and buzzer does not sound.) When pressing fan speed button, the fan
speed can be chosen and displayed according to the following order:
Outdoor units
1. Compensatory function of input parameter
Under cooling mode, the indoor ambient temperature of control calculation participated
＝
T indoor amb.
－⊿
T cooling indoor
amb. compensation
）
Under heating mode, the indoor ambient temperature of control calculation participated
＝
T indoor amb.
－⊿
T heating indoor
amb. compensation
）
2.In order to protect safe operation of the entire unit, the outdoor discharge sensor should be inserted at the sensor sleeve
corresponded to discharge tube so that the control system can accurately inspect the discharge temperature of system and
conduct accurate control and protection. Otherwise, it will shut down and indicate outdoor discharge sensor is invalid (not
correctly connect and plug at the right place). Stop for treatment, and press on/off button for recovery.
3. Cooling mode
3.1 Working condition and process of cooling operation
3.1.1 When (T indoor amb.
－⊿
T cooling indoor amb. compensation)
－
Tpreset≥0.5
℃
, unit will be started in cooling
operation.
3.1.2 When (T indoor amb.
－⊿
T cooling indoor amb. compensation)
－
T preset≤-2
℃
, or (T indoor amb.
－⊿
T cooling indoor
amb. compensation)
－
T preset
＜
-1
℃
lasts for 6 minutes and its frequency decreases to low limit frequency, the unit will
stop operation as it reaches the temperature point.
3.1.3 Otherwise, the unit will maintain its previous running status.
3.2 Temperature setting range
3.2.1 If T outdoor amb.≥
【
T low temperature cooling temperature.
】
, its set temperature range is 16~30
℃
(normal temperature
for cooling)
3.2.2 If T outdoor amb.
＜【
T low temperature cooling temperature.
】
, its set temperature range is 25~30
℃
(low temperature for
cooling), namely the lowest set temperature judged by outdoor unit is 25
℃
.
4. Drying mode
4.1 Working condition and process of drying mode: the same as cooling mode
4.2 Temperature setting range: The same as cooling mode
5. Fan mode
5.1 Compressor, outdoor fan and 4-way valve are closed;
5.2 Temperature setting range: 16
～
30
℃
.
6. Heating mode
6.1 Working condition and process of heating mode: (T indoor amb. is the actual detected temperature of indoor amb. temp.
sensor and
⊿
T heating indoor amb. compensation. is indoor amb. temperature compensation during heating operation)
6.1.1When T preset
－ (
T indoor amb.
－⊿
T heating indoor amb. compensation.) ≥0.5
℃
, unit will be started in heating
operation;
Auto
Quiet
Low
Medium
High
Turbo
