Service manual

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CONTROL
b) On condition that a low pressure protection error occurs and the whole unit has stopped for more than three
minutes and it is detected continuously for six seconds that the low pressure protection switch is closed, then this error
can be eliminated. However, if the low pressure protection occurs twice in one hour, then it has to eliminate the error by
powering the outdoor unit again.
2.2.7 Compressor overload protection
If the compressor overload switch is detected having movement, the indoor unit will display the corresponding
malfunction as it stops when the indoor temperature reaching set temperature. When the compressor stops for more than
3min and the compressor overload switch is reset, the unit will resume operation status automatically. If the protection
appears for more than 6 times (if the running time of the compressor is longer than 30min, the protection times record will
be cleared), the unit can not resume operation status automatically, but can resume running only after cutting off the power
and then putting through the power.
2.2.8 Drive Error
When the system is powered on and starts to run for the rst time, let all indoor units on line run under the “Fan”
mode, and they will go to the piping test through the preset mode after they has run at the high fan speed for six minutes.
2.2.9 Refrigerant Recovery
The refrigerant can be recovered from either the indoor unit or the outdoor unit.
From the outdoor unit: it is available to recover the refrigerant from the outdoor unit by pressing “SW3”for a long
time period.
From the indoor unit: when the unit is powered on and runs under the COOL mode, it is available within ve minute
to go the refrigerant recovery mode by pressing three times the “LIGHT” button on the wireless controller in three seconds
with “F0”displayed.
How to quit the refrigerant recovery:
When the refrigerant recovery has started, it will quit when the “SW3” is pressed down for a long time period or
there is a signal from the wireless controller or it has run for ten minutes.
2.2.10 Forcible Defrosting
How to activate this function: when indoor unit runs under the heating mode and at 16
℃
, it will activate the forcible
defrosting by pressing the “+”and “-” buttons alternately three times in ve seconds.
How to quit this function: the function will quit when the mode of indoor units conicts.
2.2.11 Switchover of the Defrosting Modes
Under the unit is under the “Off” status, if “H1” is not displayed on the wireless controller, then the unit will go to
the defrosting mode 1 when it is turned on through the wireless controller.
Under the unit is under the “Off” status, if “H1” is displayed on the wireless controller, the unit will go the defrosting
mode 2 when it is turned on through the wireless controller.
Under the unit is under the “Off” status, it is available to switch over the defrosting mode 1 and defrosting mode 2 by
pressing the “Mode” and “Blow” buttons simultaneously.
2�3 Control Function of Indoor Unit
2.3.1 Running Mode
1.COOL 2.DRY 3.HEAT 4.AUTO 5 FAN
2.3.2 Basic Functions of the System
a. COOL Mode
Under this mode, the fan and swing function goes as the set conditions, and the set temperature range is 16
℃
~30
℃
.
b. DRY Mode
Under this mode, the fan will run at the low speed and the swing function is performed under the set conditions. The
set temperature range is 16~30
℃
.
c. FAN Mode
Under this mode, only the fan of the indoor unit runs. And if the auto speed is set, the fan will run under the same
condition as the COOL mode.
d. HEAT Mode
a) Under this mode, the set temperature rang is 16
℃
~30
℃
.
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