Hisense KFR-72LW User manual

KFR-72LW/88FZBpC
Maintenance manual
Hisense Kelon Air-Conditionning Co.,Ltd

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Table of contents
一、MODELAND BRAND------------------------------------------------------------------------------------------2
1.1 Model------------------------------------------------------------------------------------------------------2
1.2 Marketing Trademark----------------------------------------------------------------------------------2
1.3 Short Selling---------------------------------------------------------------------------------------------2
二、OUTLINES--------------------------------------------------------------------------------------------------------3
三、FEATURES------------------------------------------------------------------------------------------------------4
3.1 Main functions-------------------------------------------------------------------------------------------4
3.2 Technical Features-------------------------------------------------------------------------------------4
四、SPECIFICATIONS----------------------------------------------------------------------------------------------6
五、ELECTRIC FUNCTIONS--------------------------------------------------------------------------------------7
5.1 Accessibility statement--------------------------------------------------------------------------------7
5.2 Cooling-run mode-------------------------------------------------------------------------------------19
5.3 Heating-run mode-------------------------------------------------------------------------------------10
5.4 Dehumidifying mode---------------------------------------------------------------------------------11
5.5 Air blowing mode--------------------------------------------------------------------------------------11
5.6 Dual-mode----------------------------------------------------------------------------------------------12
六、ELECTRICAL DATA------------------------------------------------------------------------------------------13
6.1 Electric Wiring Diagrams----------------------------------------------------------------------------13
6.2 Refrigerant Flow Diagram--------------------------------------------------------------------------15
6.3 System pressure diagram--------------------------------------------------------------------------15
6.4 Air-conditioning Appearance Dimension Drawing--------------------------------------------17
七、AFTER SERVICE---------------------------------------------------------------------------------------------19
7.1 Trouble List--------------------------------------------------------------------------------------------19
7.2 Parts List-----------------------------------------------------------------------------------------------21
7.3 Appendix: Specifications of components-------------------------------------------------------26
7.4 Failure Analysis And Checking Flowcharts----------------------------------------------------32

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一、 MODEL AND BRAND
1.1 Model: KFR-60LW/88FZBpC.
1.2 Marketing Trademark: Hisense Trademarks.
1.3 Short Selling: Frequency And Energy Saving.

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二、 OUTLINES
2.1 INDOOR
2.2 OUTDOOR 2.3 REMOTE

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三、 FEATURES:
1. DC inverter and Energy-saving environmental protection;
2. Large heating capacity；
3. Auxiliary heating design；
4. Voice function;
5. Ionic air purification technology；
6. Design of the wind on three sides
7. Large-size LED screen, with adjustable brightness feature;
8. Color trims, with the color change control；
9. Touch keys, Polyphonic Ringtones turning on or off;
10. Sliding Mechanism Design; The upper panel with a motion mechanism, slide up
when heating, And the wind out of the central. However, the upper panel is still and
the wind out of the top when cooling. The wind out of the central when heating and
out of the top when cooling, which is more conducive to hot and cold air convection
indoor, and improve the efficiency of heat exchange.
3.1 Main functions
3.1.1 Complete functions
Cooling, heating, dehumidification, automatic, blasting and so on. Various models
are complete and can realize various functions.
3.1.2 Touch-screen
Through the touch-screen, can intelligently adjust various refrigeration, heating and
other functions, as well as wind speed, temperature and other parameters.
3.1.3 Ultra-Low Noise
Indoor use the three sides inlet means of both sides and the bottom,
Optimization duct design, Quiet running noise.
3.1.4 Ion Purification
Efficient cold plasma can effectively remove the harmful substances indoors.
3.1.5 Sliding panel Features
When heating, the upper panel slides into the top and the middle baffle open.
When cooling or off, the upper panel slides into the bottom and Covers the middle
baffle, for beautiful and generous.
3.2 Technical Features
3.2.1 Characteristics of the circuits:
①Compressor Drivers use single-supply and low-cost IPM module program, and
improved system integration and reliability.②Compressor drive circuits use no
optocoupler and non-isolated driver program.
③System control and module driver are separated control, use asynchronous
communication mode for communication.

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④Using 180-degree sine wave drive program, improve the system vibration and
noise performance and energy efficiency while broadenning the scope of the
system ability.
⑤Using a new generation of higher reliability PFC program, further improve the
system reliability, and effectively improve the system’s harmonic performance and
energy efficiency at the same time.
⑥Outdoor switching power supply use new circuit, to reduce electromagnetic
interference.Quad output switching power supply to the system control, AC and DC
fan driver, PFC control circuit and module-driven electricity. In which system control
and other three-way power supply is fully isolated and improve reliability.
⑦Touch keys design, to highlight user-friendly design.
⑧The dedicated disply communications circuits, improved anti-jamming capability.
⑨Display and indoor power supply circuit are separated, and improved the
reliability of the work.
⑩Panel detection use photoelectric switch, and improved the reliability of
detection.
3.2.2 System characteristics:
Using high-efficiency DC compressor match with the large area of condenser and
evaporator, So air-conditioner could run stable and reliable, and energy-efficient.
3.2.3 Structural features:
Indoor structural elements is a new design
Panels: The upper panel is with a motion mechanism, which uses rack and
pinion driving program. The upper panel slides up when heating up,
and the center and both sides of the baffle open. However, the
upper panel is still, and the top and both sides of the baffle open.
The inlet use the sides and bottom inlet. The sides baffle use inside
and outside two-baffle program. The outer baffle meet the
requirements of design, while the inter baffle meet the requirements
of outlet.
Cabinet section: As the first use the material of color-coated side, eliminating
the need for spraying process. The first time using the overall style
of the case structure, using a combination production technology of
press and online bending, And using TOX riveting technology
without rivets to rivete fan backplanes, improving their appearance
and stability of the overall structure; Adopting a new duct design,
plastic volute as well as the 380mm diameter fan to further reduce
noise.
Outdoor cabinet universal W3C.
3.2.4 Additional features:
----High-efficiency compressor, High cooling capacity, Reliable and Durable.

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四、 SPECIFICATIONS
Model KFR-60LW/88FZBpC
Power Supply 220V～/ 50Hz Power Phase Single-phase Climate Type T1
Voltage Scope 175V ～250V ～Connection three-wire system Waterproof grade IPX4
Item Units Data
Rated Cooling Capacity (Minimum/Mid/ Max) kW 6.0 (1.6 / 3.0 / 6.8)
Rated Input Power (Minimum/Mid/ Max) kW 1.85 (0.45 / 0.79 / 2.40)
Rated Frequency (Minimum/Mid/ Max) Hz 72 (18 / 33 / 87)
Operating frequency range: Minimum~ Max Hz 25 ～87
Rated Input Current/Maximum Input Current A 8.4 / 14.6
Maximum Input Power kW 3.2
SEER/ APF [GB/T 7725-2004; GB 21455-2008] W/W 4.33/ - ; 3.93/3
Dehumidification Capacity L/h 2.0
AIR CIRCULATION m3/h 900
Indoor Fan Speed: Low/Mid/High r/min 260 / 320 / 380
Outdoor Fan Speed: Low/High r/min 620 / 840
Indoor/Outdoor Running Current: (Test Use) A 0.6(1±25%)/7.8(1±25%)
Cooling
Indoor/Outdoor Power Consumption: (Test Use) kW 0.13(1±25%)/1.72(1±25%)
Rated Heating Capacity (Minimum/Mid/ Max) kW 7.3 (1.4 / 3.6 / 10.0)
Rated Input Power (Minimum/Mid/ Max) kW 2.45 (0.45 / 0.97 / 3.20)
Rated Frequency (Minimum/Mid/ Max) Hz 90 (18 / 45 / 105)
Operating frequency range: Minimum~ Max Hz 25 ～105
Rated Heating Capacity/Rated input power of
low-temperature heating kW 6.5 / 2.80
Rated Input Current/Maximum Input Current A 11.4 / 20.0
Maximum Input Power kW 4.16
HSPF / APF [GB/T 7725-2004] W/W 2.7 / 2.9
AIR CIRCULATION m3/h 1000
Indoor Fan Speed: Low/Mid/High r/min 260 / 320 / 380
Outdoor Fan speed: Low/High r/min 620 / 840
Heating
Auxiliary heating device / Rated input power W RGL/1300
Temperature Range ℃-7 ～43
Fusing current of main circuit A 20
Refrigerant Code / Injection volume kg R410A/ 1.55
Indoor Noise: Minimum/Max dB(A) 33 / 42
Outdoor Noise: Minimum/Max dB(A) 48 / 52
Indoor Weight: Net Weight/GW kg 41 / 52
Outdoor Weight: Net Weight/GW kg 45 / 51
Indoor Size (length×Width×Height) cm 53×32×185
Outdoor Size (length×Width×Height) cm 90×35×64
Indoor Package Size (length×Width×Height) cm 196×64×43
Outdoor Package Size (length×Width×Height) cm 106×41×70
Compressor Manufacturers/Model/ Structure —— GUANGDONG Meizhi
/DA150S1C-20FZ/ Double Rotor
Wire: Diameter×Amount mm2 2.5×4
Connecting pipe: Tubule/Tube Diameter mm 12.7 / 6.35
Pipe: Random attachment length / Maximum m 4.0 / 15
Throttle —— Capillary
Parts Box No. —— RZA-0-1030-002-DD-0
Others
Outdoor Mounting bracket component code —— RZA-0-1040-015-XX-0

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五、 ELECTRIC FUNCTIONS
6．1 Accessibility statement
6.1.1 Failure codes self-test:
After continuously pressing "efficient" key on the remote four times in 10
seconds, the air-conditioner stars fault self-test. The fault flag should be
checked by the display chip. If there is any failure, the fault codes are
displayed in the location of the temperature value displayed, which flash 10
seconds or so, and other icons are properly displayed. If there is no failure,
screen display reads "0." Then if there is display communication failure, it
should also be displayed.
6.1.2 Fixed-frequency mode:
The air-conditioner runs into the rating, after continuously receiving the
operation of the efficient button on the remote 10 times. The air-conditioner
runs according to the original settings state, frequency value is fixed, and the
buzzer sounds five times.
6.1.3 Panel buttons and remote control logic:
Indoor control change its own state after receiving the remote control signal,
and the display contents are changed according to the settings change after
display CPU receiving the signal from the indoor control board.
6.1.4 Key Operation
6.1.4.1 Switch Key: ON or OFF.
6.1.4.2 Mode Key: Switching mode cycle.
6.1.4.3 Speed Key: Switching wind speed loop.
6.1.4.4 Temperature+ Key: Temperature increasing button, max 30.
6.1.4.5 Temperature- Key: Temperature decreasing button, minimum 16.
6.1.4.6 Left-right Throttle Key: Switching between sweeping and directional.
6.1.4.7 Lock Key: Entering lock state if no key operation about 1 minute, then
invalid key.
6.1.4.8 Unlock Key: Hold down the switch key for 2 seconds or so, Keys to unlock
state, Beeper.
6.1.5 Operator-machine communication
The air conditioner has two sets of thermal sensor to detect room temperatures.
One is equipped at remote controllers, and the other is equipped at the indoor
air inlet. The default setting for room temperatures is subject to the detection
by the remote controller. The remote controller detects the room temperature
once every 20 seconds, and automatically transmits a signal at an interval of 3
minutes or when a change in the room temperature is detected. If the indoor
control unit has not received a remote signal for more than 10 minutes, the
control function will be automatically switched over to the thermal sensor on
the indoor unit.

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6.1.6 Timer function (24-hour timer)
6.1.6.1 Timer on: When set to start in a time by the remote controller, the air
conditioner starts in the timer on condition. When the set time is up, the air
conditioner will turn on and operates in the preset conditions after receiving a
signal from the remote controller. If the air conditioner has not received a
signal from the remote controller when the set time is up, it will automatically
start and operate in the preset conditions.
6.1.6.2 Timer off: When set to stop in a set time by the remote controller, the air
conditioner will start in the timer off condition. When the set time is up, the air
conditioner will turn off after receiving a signal from the remote controller. If the
air conditioner has not received a signal from the remote controller when the
set time is up, it will turn off automatically.
6.1.7 Sleep
In the heating, cooling or dehumidifying mode, press the “Sleep” button on the
remote controller to start or cancel the sleep function in turn, and at the same
time the sleep icon on the display screen will be on or off accordingly. During
the time of sleep mode, the set temperature will change automatically. The air
conditioner will turn off and cancel the sleep function after the sleep function
works for 8 hours.
6.1.8 High efficient run function
In the heating (except for the single cooling unit), cooling or dehumidifying
mode, it may be set for high efficient run with the indoor fan speed changed to
the high efficient fan speed and the compressor operating at the highest
frequency as available. It will restore to the previous run state after 15 minutes
operation automatically.
6.1.9 Time control of Ionic Purifier
The ionic purifiers are not always in work after starting the ion feature, but be
automatically adjusted by the time (on or off).
This feature could not be started in the off state
6.1.10 Exchange of fresh air
At any time (including shutdown) can start exchange of fresh air function.
Shutdown initiative will cancel exchange of fresh air function, and exchange of
fresh air function will electrify outdoor unit.
6.1.11 Mute
After opening the mute function, indoor fan reduces speed, and outdoor
compressor reduces the frequency.
Mute function is superior to ion purification
6.1.12 Switching temperature display
Press the Temperature Switch key to switch indoor temperature, outdoor
temperature and set temperature circle.

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6.1.13 Energy-saving in use
After entering the state of energy-saving in use, the current does not exceed
X1 A, by adjusting the compressor operating frequency and limiting the
maximum current of the compressor. And switch operation can not cancel this
function.
6.1.14 Indoor Unit Error
Grating errors, DC fan and communication failure between indoor and outdoor
can lead to system downtime, but other errors can not. Report errors through
indoor LED lights.
6.1.15 Throttle State
6.1.15.1 Left-right inlet: Left-right inlets are positioned at the maximum position
when open, completely shut down after shutdown, and are still in other time.
6.1.15.2 Upper and lower damper blade：Opening and closing will be conducted
the largest location-based for the first time，and other control methods see the
corresponding mode.
6.1.15.3 Middle damper blades：Opening and closing will be conducted the
largest location-based for the first time，and other control methods see the
corresponding mode.
6.1.15.4 If shut down when the left throttle or intermediate damper in positioning
(uninterruptible power shutdown), the leaves should be restored to the shutdown
position when re-boot.
6.1.16 Automatic run mode
According to the parameters such as the set temperature and room temperature,
automatically determine the machine's operating mode
6.1．17 cooling→heating and heating→cooling:
cooling→heating: Compressor stops, 4-way valve is electrified after 50 seconds,
the compressor opens after 3 minutes
heating→cooling: Compressor stops, 4-way valve is interrupted after 50 seconds,
the compressor opens after 3 minutes
6.2 Cooling-run mode
6.2.1 Indoor fan
When the fan speed is set at the high, medium and low fan speeds, the fan runs at
a preset speed. When the fan speed setting is automatic, the fan speed is set
based on the difference in room temperatures.
When the fan speed setting is automatic, the fan speed is set based on the
difference in room temperatures.
6.2.2 Throttle blade control
6.2.2.1 The blades of the left-right throttle outlet
The blades of the left-right throttle are switched between fixed and swept according

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to the remote.
6.2.2.2 Top outlet
The top throttle is fixed at the maximum position.
6.2.3 Outdoor Fan
The speed of outdoor fan is single-speed. The outdoor fan is controlled on an off
according to outdoor ambient temperature.
6.2.4 Prevention against condensation and insufficient heat exchange at the low
indoor fan speed.
When the indoor fan speed is set at the low fan speed, the compressor’s power is
restricted as in the low temperature cooling.
6.2.5 4-way valve
State: It is interrupted in cooling.
Switchover: When initially electrified for cooling, the 4-way valve is interrupted
immediately.
When the heating is changed to the cooling, it needs an interval of 50
seconds for the 4-way valve to change over from being electrified to being
interrupted.
6.3 Heating-run mode
6.3.1 Throttle blade control
6.3.1.1 The blades of the left-right throttle outlet
The blades of the left-right throttle are switched between fixed and swept according
to the remote.
The left-right throttle is targeted to the minimum position in cold air prevention mode.
6.3.1.2 The blades of the top throttle control
The top throttle is fixed at the minimum position (the minimum position of 88 series
Floor Type Air-Conditioner is 0, that is, is closed).
The top throttle is fixed at the maximum position in cold air prevention mode.
6.3.2 Indoor fan
As cooling-run mode except for cold air prevention mode and defrosting mode (T=
Tset-Tindoor ambient).
6.3.3 Cold air prevention
If the outlet wind temperature of the indoor is too low in heating, Users can feel the
feeling of chilling by cold air. Cold air prevention function is that Controls the fan
speed according to the indoor coil temperature, and regulates the air supply, thereby,
Maintain indoor air supply at an appropriate temperature range, and improve the
air-conditioned comfort.
When the coil temperature reaches 20 after starting, indoor fan runs by the℃
breeze. Then control indoor fan speed to increase progressively according to the
indoor coil temperature. When the coil temperature reaches 38 , the indoor fan℃

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runs by the setting speed.
After stable operating, if the indoor coil temperature p <32 , the fan speed s℃
gradually reduced.
Under any circumstances, if the setting speed is less than the current speed, runs
by the setting speed.
6.3.4 Outdoor fan
The outdoor fan speeds are divided into three levels which can be changed over
according to outdoor ambient temperatures.
6.3.5 4-way valve
State: It is electrified in heating.
Switchover: When initially electrified for heating, the 4-way valve is electrified
immediately.
In the change from cooling to heating, it needs an interval of 50 seconds for the
4-way valve to change over from being interrupted to being electrified.
6.3.6 Auxiliary Heating
The unit automatically starts Auxiliary Heating or stops according to the
temperatures of indoor and outdoor.
6.4 Dehumidifying mode
6.4.1 Dehumidifying mode control
Dehumidifying mode is started or stopped according to the difference between the
setting temperature and the indoor environment temperature.
6.5 Air blowing mode
6.5.1 The outdoor unit does not work.
6.5.2 The indoor unit runs in the cooling mode. When being auto, the fan
speed is selected at medium speed.
6.5.3 The blades of the indoor throttle control
As cooling mode.
Fan Speed
Outdoor Temperature(℃)

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6.6 Dual-mode
6.6.1 Comfort mode is separated cooling comfort mode and heating comfort
mode.
6.6.2 Energy saving mode is separated cooling energy saving mode and
heating energy saving mode.

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六、 ELECTRICAL DATA
7.1 Electric Wiring Diagrams
7.1.1 Indoor
7.

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7.1.2 Outdoor

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7.2 Refrigerant Flow Diagram
7.3 System pressure diagram

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7.4 Air-conditioning Appearance Dimension Drawing
1. Indoor

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2. Outdoor

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七、 AFTER SERVICE
8.1 Trouble List
8.1.1 When the compressor is in operation, The 3 LED indicator lights on the
control panel of the outdoor unit indicates the causes of the restriction on the
compressor’s current operating frequency
Symbols for indicator light: ★: ON Ο: flashing ×: OFF
LED1 LED2 LED3 The cause of the restriction on the compressor’s current operating frequency
1 ΟΟΟNormal frequency ascent and descent with no restriction on the frequency
2 ××★Frequency descent or restriction on frequency ascent caused by over
current
3 ×★★Frequency descent or restriction on frequency ascent caused by
anti-freeze in cooling or overload control in heating
4 ★×★Frequency descent or restriction on frequency ascent caused by too high
compressor discharge temperature
5 ×★×Restriction on maximum operation operating frequency caused by too low
voltage on the supply circuit
6 ★★★Operating at a fixed frequency (when in a capacity measurement or forced
operation at a fixed frequency.)
7 ×★ΟOutdoor anti-overload protection Frequency descent or restriction on
frequency
8.1.2 When the compressor is interrupted, the outdoor LEDs are used to indicate
the troubles listed below:
Symbols for indicator light: ★: ON Ο: flashing ×: OFF
LED1 LED2 LED3 Troubles
1 ×××Normal
2 ××★Room temperature sensor short-circuited, open circuited or the
corresponding test circuit in trouble
3 ×★×Indoor heat exchanger temperature sensor short-circuited, open circuited
or the corresponding test circuit in trouble
4 ★××Compressor temperature sensor short-circuited, open circuited or the
corresponding test circuit in trouble
5 ★×★Outdoor heat exchanger temperature sensor short-circuited, open
circuited or the corresponding test circuit in trouble
6 ★★×Outdoor atmosphere temperature sensor short-circuited, open circuited
or the corresponding test circuit in trouble
7 Ο★×CT (mutual inductance coil) short circuit, open circuit or detection
circuit fault
8 Ο×★Outdoor voltage detection circuit fault
9 ××ΟSignal communication abnormal (indoor – outdoor)
10 ×Ο×Power module (IPM)protection
11 ★Ο★Maximum current control
12 ★Ο×Current overload control
13 ×Ο★Compressor discharge temperature too high
14 ★★ΟOver and under-voltage control
15 ★ΟΟOutdoor ambient temperature protection (only KFR-2820GW/BP)
16
17 Ο★★Refrigerant leak (not yet available)
18 ×★ΟCompressor housing temperature too high
19 ★★★Outdoor memory in trouble
20 ×ΟΟIndoor fan motor in trouble