Service manual

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CONTROL
a)For the duct type indoor unit: Under the COOL, HEAT, DRY, or FAN mode, the return air temperature sensor is
adopted; while under the HEAT mode, it is the receiver temperature sensor.
For the cassette type, oor/ceiling type indoor unit: Under all modes, the return air temperature sensor is adopted.
b) When the duct type, cassette type, or the oor/ceiling type indoor unit works with the wired controller, the ambient
temperature sensor can be set in the following four ways:
①
01:The indoor temperature sensor is set for the return air.
②
02:The indoor temperature sensor is set for the wired controller.
③
03:The indoor temperature sensor is set for the wired controller under the HEAT mode, and for the return air under
any other mode.
④
04:The indoor temperature sensor is set for the return air under the HEAT mode, and for the wired controller under
any other mode.
c) Setting of the Ambient Temperature Sensor of the New Screen-Touch Wired Controller
When the unit is off, it is available to go to the debugging status by pressing the “Function” and “Timer” buttons for
ve seconds, and the corresponding code will be displayed on the temperature area of the wired controller. There are four
kinds of codes which can be adjusted through the “▼” /“▲ ”button.
The third one is the default code. The setting of the ambient temperature sensor of the wired controller should be
memorized.
The “Enter/Cancel” button shall be pressed to conrm and leave the setting. If there is no response to the last button
press within 20 seconds, then the system will quit the setting and go to the normal “Off” status but with the setting still
saved.
j. Switchover of the Defrosting Mode
On condition that the unit is off, if “H1” is not displayed on the wireless controller, then the unit will go to the setting
status of the “Defrosting Mode 1”as it is turned on through the wired controller. Then, once the indoor unit receives this
signal, it will soon send it to the outdoor unit. In contract, if “H1”is displayed, the unit will go the setting status of the
“Defrosting Mode 2”, and the indoor unit also will send this signal to the outdoor unit as soon as it receives it.
On condition that the unit is off, it is available to switch over the “Defrosting Mode 1” and “Defrosting Mode 2” by
pressing the “MODE” and “BLOW” buttons simultaneously.
k. Turbo
As soon as the controller receives the “Turbo” instruction, the fan of the indoor unit will run at the extreme high
speed and the fan of the outdoor unit will run at high cooling/heating frequency.
l. Blow
Blow Function:It is a function to automatically blow off the moist inside the exchanger of the indoor unit to prevent
mould growing after the unit is shut off.
a) On condition that this function is activated, when the “On/Off” press button is operated, the fan of the indoor
unit will still run for ten minutes (with the symbol “BLOW” displayed). At this time, the fan will stop as this function is
deactivated.
b) This function is unavailable under the AUTO, FAN, and HEAT modes.
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