SERVICE MANUAL
R
−
410A Ductless Split System: DLF4(A/H), DLC4(A/H)
421 08 9204 00
45
Overload protection
If temperature sensed by the overload sensor is over 239
°
F, the
compressor will stop and the outdoor fan will stop with a time lag
of 30 seconds. If the temperature drops below 203
°
F, the
overload protection will be reset.
If voltage on the DC bus is below 150V or over 420V, the
compressor will stop and the outdoor fan will stop with a time lag
of 30 seconds. When voltage on the DC bus returns to its normal
value and the compressor has stayed at a stop for at least 3
minutes, the compressor will resume its operation.
Faults of temperature sensors
Description of
Sensors
Faults
Indoor Ambient
Temperature
The sensor is open or short
−
circuited for 30
consecutive seconds
Indoor Tube
Temperature
The sensor is open or short
−
circuited for 30
consecutive seconds
Outdoor Ambient
Temperature
The sensor is open or short
−
circuited for 30
consecutive seconds
Outdoor Tube
Temperature
The sensor is open or short
−
circuited for 30
consecutive seconds, and no detection is
performed within 10 minutes after defrost
begins
Exhaust
After the compressor has run for 3 minutes, the
sensor is open or short
−
circuited for 30
consecutive seconds
Overload
After the compressor has run for 3 minutes, the
sensor is open or short
−
circuited for 30
consecutive seconds
Other Controls
(1) ON/OFF
Press the remote button ON/OFF: the on
−
off state will be
changed once each time you press the button.
(2) Mode Selection:
Press the remote button MODE, then select: AUTO, COOL,
DRY, FAN, HEAT, or AUTO.
(3) Temperature Setting Option Button
Each time you press the remote button TEMP+ or TEMP
−
, the
setting temperature will be up or down by 1
°
F. Regulating
Range: 61
−
86
°
F , the button is useless under the AUTO mode.
(4) Time Switch
You can start and stop the machine according to the setting time
with the remote controller.
(5) SLEEP State Control
a. When the air conditioner is in the COOL or DRY mode, and
the SLEEP mode has been set, after about 1 hour, the
pre
−
setting T will raise 1.8
°
F. It will raise another 1.8
°
F again
after 2 hours. It will raise 3.6
°
F in 2 hours, then it will run on at
the setting temperature and fan speed.
b. When the air conditioner is in the HEAT mode, and the Timer
has been set, after about 1 hour, the pre
−
setting T will reduce
1.8
°
F, and it will reduce another 1.8
°
F again after 2 hours. It will
reduce 3.6
°
F in 2 hours, then it will run on at the setting
temperature and blower speed.
c. The set point stays the same under the FAN mode and AUTO
mode.
(6) Indoor Fan Control
The Indoor Fan can be set to HIGH, MED, LOW by remote
control, and the Indoor Fan will be respectively run at high,
medium, low speed. It can also be set as AUTO.
In moisture removal mode, the Indoor Fan will be set to low
speed.
(7) Buzzer Control
The buzzer will send a “Beep” sound when the air conditioner is
powered up or receives the information sent by the remote
control or there is a button pushed.
(8) Auto button
If the controller is on, it will stop when the button is pressed. If
the controller is off, it will start when the button is pressed. The
swing light will be on, and the main unit will run based on the
remote controls current settings.
(9) Up
−
and
−
Down Swinging Control
When the power is turned on, the up
−
and
−
down motor will first
move the air deflector to 0 counter
−
clockwise. The air outlet will
be closed.
After starting the machine, if you don’t set the swinging function,
heating mode and auto
−
heating mode, the up
−
and
−
down air
deflector will move to D clockwise; under other modes, the
up
−
and
−
down air deflector will move to L1. If you set the swing
function when you start the machine, then the deflector will
swing between L and D. The air deflector has 7 swing states:
Location L, Location A, Location B, Location C, Location D,
Location L to Location D, stop at any location between L
−
D (the
included angle between L~D is the same). The air deflector will
be closed at 0 location, and the swing is function only works if
the indoor fan is running.
Figure 17
-
Swing Angles for Heating and Cooling
(10) Display
a. Operation pattern and mode pattern display
All the display patterns will display for a time when the unit is
powered on, the operation indication icon will display in red
under standby status. When the machine is started by remote
controller, the indication icon will light and display the current
operation mode (the mode light includes: Cooling, Heating and
Dry). If you press the light button, all the display icons will go
dark.
b. Double
−
8 display
According to the settings of the remote control, the display may
show the current temperature (the temperature scope is from
61
°
F to 86
°
F) on the indoor ambient temperature. The heating
and air supply temperature will display 77
°
F under auto
−
mode,
the temperature will display 64
°
F under the heating mode, and
the temperature will display H1 under the defrosting mode.(If you
set the celsius temperature display, the display will show
according to celsius temperature)
(11) Protection function and failure display
E2: Freeze
−
proofing E4: Exhaust protection E5: Overcurrent
protection
E6: Communication failure E8: Overload protection
F1: Indoor ambient sensor start and short circuit (continuously
measured failure for 30S)
F2: Indoor evaporator sensor start and short circuit (continuously
measured failure for 30S)
F3: Outdoor ambient sensor start and short circuit (continuously
measured failure for 30S)
F2: Outdoor condenser sensor start and short circuit
(continuously measured failure for 30S, and not measured within
10 minutes after defrosted)
F5: Outdoor exhaust sensor start and short circuit (continuously
measured failure for 30S after the compressor has operated 3
minutes)
H3: Overload protection of compressor H5: Module protection
PH: High
−
voltage protection PL: Low
−
voltage protection
P1: Nominal cooling and heating P2: Maximum cooling and
heating
P3: Medium cooling and heating P0: Minimum cooling and
