Gree KF-70DW/NA1 Operating manual

１．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．１
２．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．３
３．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．７
４．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．８
５．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．１０
７．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．１２
６．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．１１
８．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．２７
１０ ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．４０
９．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．３５
１１．．． ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．４１
KF(R)-70DW/NA1 Technical Service Manual
Introduction
In this technical service manual, you will find rich references to KF(R)-70DW/NA1
model including photoes, technical specifications, explosive views, spare parts lists and
circuit diagrams. Service people and engineers of Gree' s customers and distributors would
find it a very handy source of technical information of our products.
Technical Support Group
Mar.2004
Contents
Summary
Technical and specifications
Names and spare parts
Outlines and installation dimensions
Working principle diagram
Circuit diagram
PCB function manual
Disassemble procedures
Explosive view and spare parts list
Care and maintenance
Trouble shooting

1
KF-70DW/NA1 1Ph 230V 50Hz
R407C
１．
KFR-70DW/NA1
Summary
Model
Note

２．
3
Model KF-70DW/NA1
Function COOLING
Power Supply (Phase-Frequency-Voltage) 1Ph – 230V – 50Hz
Capacity (W) 7000
Rated Input (W) 3100
Rated Current (A) 15.2
RecyclingAirVolume (m
3/h) 1170
Dehumidifying Volume (L/h) 2.3
C.O.P/EER (W/W) 2.26
Model KF-70D/NA1
Motor Fan Speed (r/min) (H/M/L) 1360/1280/1240
Output Power (w) 100
Fan Type-Piece Centrifugal fan - 4
Diameter-Length (mm) φ125X 134
Evaporator Aluminum fin-copper tube
Pipe Diameter φ7
Row-Fin Gap (mm) 3-1.6
Working Area (m2) 1.042X 0.19
Swing Motor MP35CA
Input Power of Motor (W) 4
Fuse (A) controllor5A transformer0.2A
Working Capacitor (uF) 3
Noise dB (A) ≤48
Dimension (W/D/H)( mm) 1300X188X600
Dimension of Package (W/D/H)( mm) 1414x248x724
Indoor unit
Net Weight /Gross Weight (kg) 32/36
Model KF-70W/dNA1
Input Power (W) 3000
Running Current (A) 14.5
L.R.A. (A) 75
Throttling Method Capillary
Compressor Model C-RN220H5B
Protector Internal overload protection
Starting Method By capacitor
Working Temp Range 2～43℃
Condenser Aluminum-copper
Pipe Diameter Φ9.52
Rows - Fin Gap (mm) 2- 1.8
Working Area (m2) 725X813
Fan Motor Power(W)/Speed (rpm) 60/780
Fan Type-Piece Axial fan –1
Outdoor unit
Fan Diameter (mm) Ф450
Technicalspecifications

4
Defrosting Method Auto defrost
Noise dB (A) 58
Dimension (W/D/H)( mm) 950x412x840
Dimension of Package (W/D/H)( mm) 1100x450x920
Net Weight /Gross Weight (kg) 75/87
Refrigerant Charge (kg) R407C/2.4
Length (m) 5
Liquid Pipe (mm) Φ9.52(3/8”)Outer
Diameter Gas Pipe (mm) Φ16(5/8”)
Height (m) 5
Connecting Pipe
Max
Distance Length (m) 10
Outdoor unit
The data of above are subject to be changed, please refer to the nameplate for reference.

5
Model KFR-70DW/NA1
Function COOLING HEATING
Power Supply (Phase-Frequency-Voltage) 1Ph – 230V – 50Hz
Capacity (W) 7000 8500
Rated Input (W) 3000 3050
Rated Current (A) 14.6 15.1
Recycling Air Volume (m3/h) 1170
Dehumidifying Volume (L/h) 2.3
C.O.P / EER (W/W) 2.3 2.79
Model KFR-70D/NA1
Motor Fan Speed (r/min) (H/M/L) 1360/1280/1240
Output Power (w) 100
Fan Type-Piece Centrifugal fan - 4
Diameter-Length (mm) φ125X 134
Evaporator Aluminum fin-copper tube
Pipe Diameter φ7
Row-Fin Gap (mm) 3-1.6
Working Area (m2) 1.042X 0.19
Swing Motor MP35CA
Input Power of Motor (W) 4
Fuse (A) Controllor5A transformer0.2A
Working Capacitor (uF) 3
Noise dB (A) ≤47
Dimension (W/D/H)( mm) 1300x188x600
Dimension of Package (W/D/H)( mm) 1414x248x724
Indoor unit
Net Weight /Gross Weight (kg) 32/36
Model KFR-70W/dNA1
Input Power (W) 2900 2950
Running Current (A) 14.2 14.7
L.R.A. (A) 75
Throttling Method Capillary
Compressor Model C-RN220H5B
Protector Internal overload protection
Starting Method By capacitor
Working Temp Range 2～43℃
Condenser Aluminum-copper
Pipe Diameter Φ9.52
Rows - Fin Gap (mm) 2- 1.8
Working Area (m2) 725x813
Fan Motor Power(W)/Speed (rpm) 60/780
Fan Type-Piece Axial fan –1
Outdoor unit
Fan Diameter (mm) Ф450

6
Defrosting Method Auto defrost
Noise dB (A) 58
Dimension (W/D/H)( mm) 950x412x840
Dimension of Package (W/D/H)( mm) 1100x450x920
Net Weight /Gross Weight (kg) 75/87
Refrigerant Charge (kg) R407C/2.5
Length (m) 5
Liquid Pipe (mm) Φ9.52(3/8”)Outer
Diameter Gas Pipe (mm) Φ16(5/8”)
Height (m) 5
Connecting Pipe
Max
Distance Length (m) 10
Outdoor unit
The data of above are subject to be changed, please refer to the nameplate for reference.

3.
7
Names of spare parts
Indoor unit
Leftdecorationplate
Airguidelouver LEDboard
Rightdecorationplate
Front grill
Wrappingtape
Connectionpipe
Valve
Airout
Airin
Outdoorunit
Wirelessremotecontrol

４．
１８８
６００
１３００
100cm
30cm
60cm
60cm
150cm
8
４．１
Outlines and installation dimension
Outlines and dimensions of indoor unit
or more
or more
or more ormore
ormore

４．２
：ｍｍ
５００ｍｍ ５００ｍｍ
３００ｍｍ
２０００ｍｍ
1000mm
1000mm 1000mm
950
572
378
412
340
70
65106
８４０
9
Outlines and dimensions of outdoor unit
Unit
Handle Gas pipe Wire hole Liquid pipe Front grill
Morethan Morethan
Morethan
Airoutlet
Floor
More than
More than More than
More than
Obstructions

５．１
５．２
5.
10
Working principle diagram
Cooling system diagram for cooling only type
Cooling system diagram for cooling/heating type
When the power is on, indoor and outdoor units will start to run. The compressor sucks low-pressure refrigerant gas from the evaporator of indoor unit and
then discharges high-temperature, high-pressure refrigerant gas into outdoor condenser. Then air exchanges the heat with outdoor air and becomes refrigerant
liquid. The liquid is throttled by the capillary and changes into low-temperature and low-pressure liquid and then flows into indoor evaporator. Then liquid exchanges
the heat with the required air and changes into low-temperature and low-pressure refrigerant gas. the cycle introduced above goes on and on, and the demanded low
temperature environment is maintained.
When the power is on, indoor and outdoor units will start to run. When the system operates in cool mode, the compressor sucks low-temperature, low-
pressure refrigerant gas from indoor evaporator and then discharges high-temperature, high-pressure refrigerant gas into outdoor heat exchanger. With the
help of axial flow fan, the gas transfers its latent heat into outdoor air and becomes high-pressure refrigerant liquid. The liquid is throttled by the capillary
and changes into low-temperature and low-pressure liquid and then flows into indoor heat exchanger. With the help of centrifugal fan, the liquid evaporates
into low-temperature refrigerant gas and indoor air is cooled down. The refrigerant gas is sucked into the compressor and the cycle introduced above goes
on and on, and the demanded low temperature environment is maintained.
When the system operates in heat mode, 4-way valve changes its way and the refrigerant flows in the reversible cycle as the cool mode. The refrigerant
discharges its latent heat in the indoor heat exchanger, and sucks heat from outdoor heat exchanger and forms the heat pump cycle. This cycle goes on and
on, and the demanded high temperature environment is maintained.
Heating
Cooling Compressor
Gas-liquid separator
Condenser
electromagnetic
4-wayvalve
Axial flow fan
Auxillary capillary
Main capillary Filter
One-way valve
Cross flow fan
Evaporator
Evaporator Cross flow fan Capillary Filter
Axial flow fan
Condenser
Compressor
Gas-liquid separator

６．
11
KFR-70DW/NA1
KF-70DW/NA1
Circuit diagram
The circuit diagram are subject to change , please refer to the ones on the machine.

８７．
12
7.1
①
②
③
④
7.2

7.2.1




7.2.2




PCB function manual
Temperature parameter
Foundamental functions
DRY Mode
The room ambient temperature: (Tamb)
The room evaporator temperature:(Tevaporator)
The outdoor condenser temperature: (Tcondenser)
The exhasut temperature:(Texhaust)
In each mode, the compressor starts at once, it will not stop within 6min according to the changes of Tamb,
when it stopped once, after 3mins delayed, can start it again.
COOL mode
When Tamb≥Tset+1℃ , it will enter into COOL mode, the compressor, outdoor fan motor run.
Indoor fanmotor and swing motor run at the setting fan speed and setting.
When Tamb≤Tset-1℃, compressor, outdoor fan motor stop running. Indoor fan runs at set fan speed.
When Tset-1℃ ＜ Tamb ＜ Tset +1℃, keep the previous running mode.
In COOL mode, temp. setting range is 16℃～30℃.
When Tamb＞Tset+2℃, enter into COOL mode, the compressor, outdoor fan motor run, indoor fan motor
runs at setting low fan speed.
When Tset-2℃≤Tamb ≤Tset+2℃,compressor, outdoor fan motor run 6min, stop for 4min, that goes round
and round, indoor fan motor runs at low fan speed.
When Tamb＜Tset-2℃， the compressor and outdoor fan motor stop running, indoor fan motor runs at low
fan speed.
In DRY mode, the temp. setting range is 16℃～30℃.

13
7.2.3





７．２．３．１

７．２．３．２


HEAT Mode
When Tamb≤Tset-1℃ enter into HEAT mode, reversing valve, compressor, outdoor fan motor start to work.
indoor fan motor runs at setting fan speed and anti-cool wind.
When Tamb≥ Tset +1℃ ,compressor, outdoor fan motor stop running, reversing valve is powered on, indoor
fan motor runs at low speed and after blowing for 10s later, it will stop.
When Tset-1℃＜Tamb＜Tset+1℃， it will keep the original status.
In HEAT mode, the temp. setting range is 16℃～30℃.
In HEAT mode, the unit is turned off or swtich to othermode, after compressor stopped for 2min, the 4-way valve
is powered off.
Conditions for anti-cool wind
When compressor start to run in HEAT mode, the indoor fan motor does not run, 3min later
the indoor fan motor runs at the setting fan speed.
Conditions for defrosting
When unit keeps running 44min in heat mode, and 1min continuously had detected Tcondenser≤-5℃，
the defrosting started, the reversal valve, indoor and outdoor fan will stop running.
When the defrosting started running for 10min or Tcondenser≥10℃,defrosting will stop running, the
reversal valve, outdoor fan will run at the same time, the indoor fan motor will run in anti-cool mode.

14
7.2.4

7.2.5
 ℃.




7.3
7.3.1

FAN mode
Indoor fan motor runs at setting fan speed:
AUTO LOW MED HIGH
Temp. setting range is 16℃～ 30℃.
Auto mode
When Tamb＞2℃, it runs at cool mode, indoor setting temp. is25
Protection Functions
Indoor antifreezing protection
When 20℃≤Tamb≤2 6℃ , it will run in dry mode, the inner setting temp. is 24℃.
When Tamb＜20℃,it will run in HEAT mode, inner setting temp. is 20℃,Tamb≥24℃,quit HEAT mode.
If it is cooling only type unit, when Tamb＜20℃， it will run in FAN mode, inner setting temp. is 24℃．
When each mode start up, at least running for 30 seconds, Tamb then switch to AUTO mode running status.
Teva＜－2℃， it shows E2, compressor stops running, outdoor and indoor fan motor,
swing motor keep original running; when Teva＞６℃， compressor has stopped 4min,
When in COOL mode, compressor started up 10min, when continuously 3min detected

15

7.3.2


7.3.3


7.3.4


it will come back to display, controller runs at setting mode.
Compressor high pressure protection
When detected high pressure protection, E1 will be displayed.
When detected the compressor high pressure protection is released, E1 still display,E1 still display, that need to press
ON/OFF button to clean E1 displaying, and repress ON/OFF button to resume to run.
Compressor low pressure protection
When detected the low pressure switch tripped off, the unit will stop, after 3min it will resume to work automatically;
If E3 displayed, that can not resume automatically, so need to press ON/OFF button to turn off the unit, and repress
ON/OFF button for resuming.
When compressor stopped, detected low pressure switch tripped off, the unit stop, and E3 displayed, that cannot
resume automatically, need to press ON/OFF to turn off the unit, then repress ON/OFF button can resume to work.
Air exhaust pipe high temperature protection
After compressor started up, when detected delivery temp. is too high or air exhaust sensor is short circuit (or open circuit),
according to indoor ambient temp. if achieved the setting temp. the unit will stop.
After compressor stopped for 3min, when delivery temp. is get right, unit resume to run.
In DRY mode, it will run for 6min, and stop running for 4min, after compressor has run for 3min, and had
continuously 3min detected Ttube＜- 2℃, compressor, outdoor and indoor fan will run in low fan speed, and E2 is
displayed. When Ttube＞6℃, the compressor had stopped 4 min, and resume to display, the controller will run at
the setting mode.

16

7.3.5

7.3.6

7.3.7
7.4
7.4.1



7.4.2

7.4.3

7.5
If the above phenomenons existed, the unit cannot resume to run, E4 will be display. Press ON/OFF button to
turn off the unit, repress ON/OFF button return to run at the original running mode.
Indoor ultra high temperature protection
In HEAT mode, when detected the evaporator tube temp. is too high, outdoor fan motor stop running;
when evaporator tube temp. get right, outdoor fan motor start up.
Low voltage protection
Compressor is turned on, if the current had been detected exceed 22A, the room ambient temp. achieved the
setting temp., the unit will stop. When compressor had stopped 3min, it will automatically return to the original
setting mode. When displaying E5, can not automatically return to the original running mode, that need to press
ON/OFF button to turn off the unit, then repress the ON/OFF button to resume to work.
Error codes
E1: Compressor high pressure protection E2: Indoor anti-freezing protection E3: Compressor low pressure protection
E4: Air exhaust pipe high temp. protection E5: Low pressure protection
Functions of Sleep and Timer:
Sleep
If controller is in COOL mode or DRY mode, after SLEEP operation run for 1hour, the presetting Tset will be
increased 1 ℃， 2hours later, it will be increased 1℃， it ha s been decreased 2℃ within 2hours in all, then it runs at the setting temp.
If controller is in HEAT mode, after SLEEP operation run for 1hour, the presetting Tset will be decreased 1℃
2 hours later it will be decreased 1℃,it has been decreased 2℃within 2hours in all, then it runs at the setting temp.
There is no SLEEP function in FAN mode and AUTO mode.
Timer on
At powered on, the timer on could be set, when the time arrived, the controller runs at the original setting mode,
the time interval is 0.5h, setting range is 0.5-24h.
Timer off
At operating, the timer off could be set, if the time arrived, the unit will turned off, the time interval is 0.5h,
setting range is 0.5-24h.
Other control

17
7.5.1

7.5.2

7.5.3
7.6



7.7


SWING Control
In FAN mode:
The auto fan speed is as the same as the cool mode.
In COOL mode:
If Tamb≤Tset, that is low speed
If Tset＜Tamb≤Tset+3℃, is medium speed
If Tamb＞Tset+3℃, is high speed
If Tamb≥Tset, is low speed
I f Tset-3℃≤ Tamb＜Tset, is medium speed
If Tamb＜Tset-3℃,is high speed
In HEAT mode:
The auto fan speed control of the fan motor
The buzzer control
When controller is powered on or received the signals, the buzzer will sound.
Use SWING button to start or stop the control, only when indoor fan motor is running the SWING operation is available.
Indicators:
defrosting operations, the indicator flash.
When power suply indicator is powered on, it will light, when powered off, it will extinguish. When it is indoor
anti-freezing protection, compressor high pressure protection, low pressure protection as well as
The COOL indicator is lighting in COOL mode, DRY mode, Auto COOL, Auto DRY, in the other modes will extinguish.
The HEAT indicator is lighting in HEAT mode, and Auto HEAT mode, it will extinguish in other modes.
Memory function:
Memory contents: when MODE, SWING, TEMP. Setting, FAN Setting, TIMER Setting (When the time hasn't
arrived, and it powered off, the time will be recalculated; if the time had arrived and it is powered off, when
powered on, it will run at the mode which is the time arrived.)
After powered off, when powered on, the unit can automatically start up and run at the memory contents.

飞 碟 系 列
7.8
“ ”
“ ”
“ ”
“ ”
REMOTE CONTROL OPERATION PROCEDURE
18
Names and functions of wireless remote control
Note:
Be sure that there are no obstructions between receiver and wireless remote control.
The wireless remote control could receive the signal within 10 meters.
Don't drop or throw the wireless remote control.
Don't let any liquid in the wireless remote control and put it directly
under the sunlight or any place where is very hot.
SWING button
When it is pressed, the louvers
start to rotate automatically and
stop when repressed.
FAN button
Press this button to change
the fan speed of:
AUTO FAN
COOL mode
DRY mode
FAN mode
HEAT mode
1/0button
Press this button, the unit
starts to run, when press
it once more, the unit will
stop running.
MODE button
Press this button,the op-
eration will be changed
in the order of:
AUTO
TEMP.button
Temp. setting: increase or
decrease 1 by pressing
or once.
range is 16℃～30℃.
When in mode, setting
ra nge is
When in mode, setting
１６℃～３０℃．
range is
When in mode, the setting.
１６℃～３０℃．
In AUTO mode, the setting
temp. is unavailable.

REMOTE CONTROL OPERATION PROCEDURE
7.9
0 24h
Cancel
0 24h
19
Names and functions of wireless remote control(Remove the cover)
Note:This type of wireless remote control is a kind of new current control.
Some buttons of the control which are not available to this air conditioner
will not be described below.
Liquid crystal displayer
It shows all set contents.
SLEEP button
Pressthis button to set SLEEP
operationand stopwhen repressed.
TIMER OFF button
At stopping, press this button
to set TIMER OFF, each time
to press it , the time will be in-
creased 0.5h.
It circulates as below:
TIMER ON button
At stopping, press this button
to set TIMER ON, each time
to press it, the time will be in-
creased 0.5h.
It circulates as below:
Cancel

REMOTE CONTROL OPERATION PROCEDURE
7.10
16 ～30
4.
5.
2.
3.
1.
20
COOL mode operation
Press the button to start
theFAN,andsetthefanspeed.
Press the SWING button,
the louver will automatically
swing and when repressed,
it will stop to swing.
Press the button to ad-
just the suitable tempera-
ture.
Press MODE
button to select
When pluged in,press 1/
0 button, the unit will start
to run.
Microcomputer will accord to the room sensor detected the temp. and setting temp. differences
to start the cool operation or not.
The room sensor detected temp. is higher than setting temp., the cool mode operate.
The room sensor detected temp. is lower than setting temp., indoor fan motor will stop running,
water valve will be turned off, cool operation will stop.
Temp. setting range is .