Hokkaido HCNL 531 X2R User manual

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Domestic
Air conditioner
CAUTION
READ THIS MANUAL
CAREFULLY TO
DIAGNOSE TROUBLE
CORRECTLY BEFORE
OFFERING SERVICE.
THIS MANUAL IS USED
BY QUALIFIED
APPLIANCE
TECHNICIANS ONLY.
HOKKAIDO DOES NOT
ASSUMEANY
RESPONSIBILITY FOR
PROPERTY DAMAGE
OR PERSONAL INJURY
FOR IMPROPER
SERVICE
PROCEDURES DONE
BY ONE UNQUALIFIED
PERSON.
HCNL 531 X2R
HKEL 201 X3R
HKEL 261 X3R
HKEL 351 X3R

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CONTENTS
1. GENERAL INFORMATION...............................................................3
2. SPECIFICATION...............................................................................5
3. ELECTRICAL CONTROL..................................................................7
4. THERMISTER RESISTANCE CHART.............................................20
5. TROUBLE SHOOTING....................................................................29
6. PERFORMANCE CURVES DIAGRAM...........................................41
6.1 High drop and long pipe capacity modification curves………………………….....41
6.2.1 Cooling capacity-temperature curves……………………………………………..42
6.2.2 Heating capacity-temperature curves……………………………………………..44
6.3 Air outlet temp.-ambient temperature curves…………………………………….…46
6.4.1 Cooling discharge pressure curves...................................................................48
6.4.2 Cooling suction pressure curves.......................................................................50
6.4.3 Heating discharge pressure curves...................................................................52
6.4.4 Heating suction pressure curves.......................................................................54
6.5 Power consumption-temperature curves............................................................. 56
6.6 Noise curves........................................................................................................58
6.7 Sensible cooling value - Temp.curves.................................................................59
6.8 Compressor performance curves………………………………………………........61
7. WIRING DIAGRAM..........................................................................62
8. SCHEMATIC DIAGRAM OF PCB....................................................64
9. INSTALLATION................................................................................67

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1. General information
This Service Manual describes the operation, disassembly, troubleshooting, and repair of Haier Room
Air Conditioners, etc. It is intended for use by authorized services who troubleshoot and repair these
units.
It is assumed that users of this manual are familiar with the use of tools and equipment used to
troubleshoot and repair electrical, mechanical, and refrigeration systems; and understand the
terminology used to describe and discuss them.
Haier urges you read and follow all safety precautions and warnings contained in this manual. Failure
to comply with safety information may result in severe personal injury or death.
Related Publications
This is a base service manual, covering a range of similar models. It is intended to be used in
conjunction with the Parts Manual and Technical Sheet covering specific model being serviced.
NOTE: General Precautions and Warnings
WARNING
To avoid risk of personal injury or death due to electrical shock, disconnect electrical power to unit
before attempting to service the unit.
WARNING
To avoid risk of personal injury or death due to electrical shock, DO NOT, under any circumstances,
alter the grounding plug .Air conditioner must be grounded at all times. Do not remove warning tag
from power cord. If a two-prong (non-grounding) wall receptacle is encountered, contact a qualified
electrician and have the receptacle replaced with a properly grounder wall receptacle in accordance
with the National Electrical Code.
WARNING
To avoid risk of heat exposure, which may cause death or severe illness, air conditioner must be
monitored when failures or shuts down.
WARNING
To avoid risk of personal injury or death due to electrical shock, grounding wires and wires colored like
grounding wires are NOT to be used as current carrying conductors. The standard accepted color
coding for ground wires is green or green with a yellow stripe. Electrical components such as the
compressor and fan motor are grounded through an individual wire attached to the electrical
component and to another part of the air conditioner. Grounding wires should not to be removed from
individual components while servicing, unless the component is to be removed and replaced. It is
extremely important to replace all removed grounding wires before completing service.

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Product Features
Comfortable:wide-angle airflow
Health air purifying
Quiet operation
Engergy efficient
Wide variety of functions
MODEL:
HCNL 531 X2R

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2. Specification
Item Unit
HCNL 531 X2R
HKEL 261 X3R
HKEL 261 X3R
PowerPH, V, Hz 1, 230, 50 1, 230, 50
Climate Type T1 T1
Starting Current A 12 12
Cooling Capacity W 2600/5200 2600/3500/5300
Rated Power W 780/1560 780/990/1650
Rated Current A 3.4/7.6 3.4/4.1/7.9
Max Power W 1230/2100 1230/1350/2530
Max Current A 5.1/9.5 5.1/5.9/10.3
Cooling
33.3/33.3W/WREE 3.3/3.53/3.21
Heating Capacity W 3200/6200 3200/3800/6300
Rated Power W 1300/1700 1300/1455/1740
Rated Current A 5.8/7.8 5.8/6.9/7.9
Max Power W 1700/2300 1700/1560/2360
Max Current A 7.8/10.3 7.8/7.1/10.4
Heating
/64.2W/WPOC 3.64 2.46/2.61/3.62
Cooling 64~8164~81Operating
temp. rangeHeating-15~24 -15~24
Hrpm1150 1150/1250
Mrpm11001100/1100
Indoor fan
Velocity mprL 059/009
009
Outdoor fan Velocityrpm 860 860 /860
Indoor Air Volume (High) m3500 500/550
Max. pressure at warm sideMPa4.154.15
Moisture Removal 10-3m3/h 1.21.5
Indoor (H/M/L) dB(A)42/39/3543/39/35
Noise Level Outdoor 5555)A(Bd
Net Kg 8.6 8.6Indoor
WeightgKssorG 10.810.8
Net Kg 48.848.8Outdoor
WeightgKssorG 52.7 52.7
Netmm 795*182*265795*182*265Indoor
DimensionPackage mm 865*272*330865*272*330
Net mm 810*288*680810*288*680Outdoor
DimensionPackage mm 960*405*760960*405*760
Manufacturepanasonicpanasonic
Type 5CS130XCC03 5CS130XCC03
Compressor
Oil Charge ml 480 480
HCNL 531 X2R
HKEL 261 X3R
HKEL 351 X3R

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Type R410A R410A
Net Charge g 1800 1800
Refrigerant Charge if over standard
pipe length g/m 20 20
Liquid pipe Diameter mm 6.35 6.35
Gas pipe Diameter mm 9.52 9.52
Standard length m 5 5
Refrigerant
Pipe
Max length m 15 15
Length mm 580 580
Drain Hose Diameter mm 25.5 25.5
Remote Controller Model YR-S01 YR-S01
Class of electric Shock Protection I I
Class of Water Proof IP 24 IP 24
Power Cord (Model × Sectional Area) H05VV-F 3G2.5mm2H05VV-F 3G2.5mm2

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3. ELECTRICAL CONTROL
3.1.The indoor system
3.1. 1Operation Mode
3.1.1.1 Automatic operation
When the system is under the automatic operation option, the appropriate operation mode
will be decided according to the differences between the preset temperature and the indoor
temperature after the system starts up. Then, the system will operate according to the chosen
mode. In the following conditions, Tr stands for indoor temperature and Ts stands for outdoor
temperature.
Under the automatic option, the system will switch between the cooling and warming modes
according to the change of the indoor temperature. If the air conditionic is under the cooling
mode, when the preset temperature for stopping the compressor is reached, the compressor will
be stopped. The indoor temperature will be tested again 15 minutes after the stop of the
compressor. At the moment, if the tested temperature is under the Tr˘Ts-3ćcondition, the system
will be switched into the warming mode. If not, the system will remain in the cooling mode. If the air
conditionic is under the warming mode, when the preset temperature for stopping the compressor is
reached, the compressor will be stopped. The indoor temperature will be tested again 15 minutes
after the stop of the compressor. At the moment, if the tested temperature is under the Tr
˚Ts+8ćcondition, the system will be switched into the cooling mode. If not, the system will remain in the
warming mode.
３．1.1.2 Cooling operation mode
Temperature control range: 16ć---30ć
Temperature difference: r1ć
*Control features: When Tr˄input airflow˅>Ts˄set temperature˅ć, the compressor will be
opened,the indoor fan will operate at the set speed and the mode signal will be sent to the
outdoor system. When Tr˄input airflow˅Ts˄set temperature˅ć, the compressor will be
opened,the indoor fan will operate at the set speed and the mode signal will be sent to the
outdoor system. The system will keep the original status if Tr= Ts.
Airflow speed control: (temperature difference 1ć)
Automatic: When Tr>=Ts+3ć, high speed.
When Ts+1ć=<Tr<Ts+3ć, medium speed
When Tr<Ts+1ć, low speed
When the sensor is off, low speed
When the airflow speed has no delay from the high to low switching, the speed should be delayed
for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manul: When the system is operating, you can set the high, medium or low speed manually.
( When the sensor is on or off, the system will change the speed 2 seconds after receiving the
signal.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling
or demoisture). When the compressor works continuously for 1/6 minutes (adaptable in EEPROM)
and the temperature of the indoor coils has been below zero centigrade for 10 seconds, the

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compressor will be stopped and the malfunction will be recorded in the malfunction list. The
indoor system will continue to run. When the temperature of the indoor coil is raised to 7
ć, the compressor will be restarted again (the prerequirement of 3 minutesÿdelay should be
satisfied.)
* timing system on/off function.
* Dormant control function.
３．1.1.3 Demoisture mode.
* temperature control range: 16---30ć
* temperature difference: r1ć
Control feature: send the demoisture signal to the outdoor system.
When Tr>Ts+2ć, the compressor will be turned on, the indoor fan will operate at the set
speed.
When Tr is between the Ts and Ts+2ć, the outdoor system will operate at the high demoisture
frequency for 10 minutes and then at the low demoisture mode for six minutes. The indoor fan
will operate at low speed.
When Tr< Ts, the outsystem will be stopped, the indoor fan will be stopped for 3 minutes
and then turned to the low speed option.
All the frequency converses have a f1ćdifference.
* Wind speed control: Automatic:
When Tr >= Ts+ 5ć, high speed.
When Ts+3ćdTr< Ts+5ć, medium speed.
When Ts+2ćdTr< Ts+3ć, low speed.
When Tr<Ts+2ć, light speed.
If the outdoor fan stopped, the indoor fan will be paused for 3 minutes.
If the outdoor fan stopped for more than 3 minutes and the outdoor system still operates, the
system will be changed into light speed mode.
When the airflow speed has no delay from the high to low switching, the speed should be delayed
for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
Manual: When the sensor is off or Tr< Ts+3ć, the manual operation can not be made. (obligatory
automatic operation.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling
or demoisture). When the compressor works continuously for 1/6 minutes (adaptable in EEPROM)
and the temperature of the indoor coils has been below zero centigrade for 10 seconds, the
compressor will be stopped and the malfunction will be recorded in the malfunction list. The
indoor system will continue to run. When the temperature of the indoor coil is raised to 7
ć, the compressor will be restarted again (the prerequirement of 3 minutesÿdelay should be
satisfied.)
* coil protection (synchronic overheating protection) are installed for the four directions
latch malfunctions when demoisturing.
* timing system on/off function.
* Dormant control function.

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３．1.1.4 Heating operation mode.
* temperature control range: 16---30ć
* temperature difference: r1ć
* control feature: the temperature compensation is automatically added and the system will
send the heating signals to the outdoor system.
If TrdTs(compensatory value, the outdoor compressor is turned on, the indoor fan will be at the cold air proof
mode.
If Tr>Ts+compensatory value , the outdoor system is turned off, the indoor fan will be at the heat residue
sending mode.
If Tr<Ts+compensatory value , the outdoor system will be turned on again, the indoor fan will be at the cold
air proof mode.
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr<Ts, high speed.
When Ts=<Tr=<Ts+2ć, medium speed.
When Tr> Ts+2ć, low speed.
When the airflow speed has no delay from the high to low switching, the speed should be delayed
for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
*Airgate location control: the location for the airgate can be set according to your needs.
*Coldair proof operation
˄1˅he indoor operation within 4 minutes after the start up is as the following diagram
the air speed can be raised only after the speed has reached a certain level.
˄2˅4 minutes after the start up of the indoor fan, the light airflow and the low airflow
will be turned to the set speed airflow.
˄3˅In the cold air proof operation, the fan wonÿt stop after the start up.
˄4˅
During the cold air proof operation, the indoor system will continuously send þindoor
high speedÿsignals to the outdoor system.
* Residue heat sending. The indoor fan will send the residue heat at a low speed for 12 seconds.
If other conditions are satisified, when the compressor stops, the indoor system will operate at a light speed. The
Heat start temp 1
Heat start temp 2
Heat start temp 3
Heat start temp 4
Set speed
Low
Light speed
Fan/off
Fan/off No fan off
set speed
Keep the

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indoor fan will stop when the coil temperature is below the ‘ heat start temp 4’ .
* Defrosting. When the system receives the defrosting signal from outdoors, the indoor fan will stop and the
indoor temperature display won’ t change. At the time, any indoor coil malfunctions will be neglected. When the
outdoor defrosting finishes, the coil malfunction will still be neglected until the compressor has been started up
for 30 seconds. The indoor temperature display will not change and the system operates at the cold air proof
mode.
* Automatic heating temperature compensation: when the system enters the heating mode, the temperature
compensation (4) will be added. When the status is switched off, the compensation will be erased.
３.2 strength operation
the system enters the mode after receiving the þPOWER
ÿ.
Send strength operation signal to the outdoor system.
Strength operation for 15 minutes.
The strength operation stops or finishes after the 15 minutes.
The mode change finishes the strength operation.
Entering þSOFT
ÿ, you can have normal operation or signal control such as timing to finish
the strength operation.
When the system is at the automatic option with the strength/ mute function, if the system enters
the cooling mode, the cooling strength/ mute function will be offered; if the system enters the
heating mode, then the heating strength/ mute function will be offered; if the system enters the
airflow mode, there will be no strength/ mute function.
３.3 Mute operation
the system enters the mode after receiving the þmute signalÿ.
3.3.1. Mute heating: the airflow speed is slight, the system sends the mute signal to the outdoor system.
3.3.2 mute cooling: the airflow speed is slight, the system sends the mute signal to the outdoor system.
When the compressor operates, the airflow speed is mute speed. EEPROM is adaptable.
Mute operation can not work under the demoisturing and airflow-sending operation.
３.4 Negative Ion Health Feature Control
After receiving the signal from the remote control,(HV series: the background light of the
þhealthÿlogo is green. HS series: the þhealthÿindicator will be lighted). If the fan
operates, the negative ion generator operates to realize the negative sending function.
If the indoor fan stops, the negative ion generator is turned off.
When the negative ion generator is turned off, if the air refreshing system is turned on, the
negative ion generator will be turned on when the fan operates.
３.5 Timing.
You can set 24 hoursÿon/off timing accordingly. After the setting, the timing indicator will
be lightened. Also, the light will be turning off after the timing is finished. The followings
are several timing methods.
３．5.1 system /on timing: The timing indicator will be lightened and the indoor system is under
the waiting mode. The light will be turned off when the timing is finished and the rest of the
system will operate under a normal condition. The timing starts since the last reception of
the timing singal. You can have the dormacy setting under the timing mode, the order of your

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settings will be operated according to the timing settings.
３．5.2 system /off timing: When the system is turned on, the timing indicator is lightened, the
rest of the system will operated under a normal condition. When set time comes, the indicator
light will be turned off and the system will be turned off. If you have set the dormant functions,
the order of your settings will be operated according to the timing settings.
３．5.3 system /on and off timing: The settings will be completed according to the orders.
3..6 Dormant operation
The dormant timing is an eight hours unadaptable one. The timing signs are shown
on the V series board. (RC series show the dormant signal, the timing light is lighted
on the 6 lights board).
3..6.1 Under the cooling/ demoisture operation, after the setting of the dormant operation, the set temperature
will be raised for 1 centigrade after 1 hour’ s operation and will be raised for 1 centigrade 1 hour later. The
system will keep this status for 6 hours and then close.
3..6.2 Under the heating mode, after the setting of the dormant operation, the et temperature
will fall 2 centigrades after 1 hour’s operation and will fall 2 centigrades 1 hours later.
3 hours after the preceding operations, the set temperature will be raised for 1 centigrade
and the system will keep this status for 3 hours and then close down.
３.6.3 During the dormant time, except the change of the system mode or a new press on the dormant
setting keys, the timing of the 8 hours dormancy will take the first timing as the start time,
any presses on other keys will not affect the original timing.
3..6.4 Indoor fan control under the dormant operation.
If the indoor fan is at the high speed before the dormant operation setting, the speed will
be turned to medium after the setting. If the fan is at the medium speed before the dormant
setting, the speed will be turned to low after the setting. If the fan is at the low speed before
the dormant setting, the speed will not change.
3.7 Urgent on/off input
3.7.1 Press the urgency button the buzzer will ring. The system will enter the automatic mode if you don’ t
press the button for more than 5 seconds.
Under the system off mode, if you press the urgency key for 5 to 10 seconds, the system will start the test
operation.
Under the system off mode, If you press the urgency key for 10 to 15 seconds, the display screen will show
the resume of the last malfunction.
If the system is under operation, the press on the urgency key will stop it.
Under the system off mode, the display screen will show automatic running sign.
Under the system off mode, the system will not receive the remote control signal if the press on the urgency
key doesn’ t last for 15 seconds or if the key is loosened.
３.7.2 Urgency operation: If you press the urgency key for less than 5 seconds, the buzzer will
ring when you press the on/off key. The system will enter the urgency operation when
the urgency key is loosened. The urgency operation is fully automatic.
３.7.3 Trial operation.
a. The inlet temperature sensor doesnÿt work, the indoor fan and the indoor air direction
board motor works synchronically. High speed airflow, cooling, outdoor system on, etc,
will send the ambient temperature 30 centigrade and coil temperature 16 centigrade
information to the outdoor system.
b. Test operation

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The defrost protection of the evaporator doesnÿt work.
The temperature control doesnÿt work.
c. The test operation will be finished in 30 minutes.
d. The test operation can be stopped by the relative commands from the remote control.
3.8 Low load protection control
In order to prevent the frosting of the indoor heat interaction device, the outdoor system will be
stopped if the indoor heat interaction temperature is below zero centigrade for 5 minutes, but the
fan will continue to operate. The outdoor system will be started again when the heat interaction
temperature is above 7 centigrade and the system has been stopped for 3 minutes. The
malfunction will be stored in the malfunction resume and will not be revealed.
3.9 High load protection control
The outdoor system will be stopped if the coil temperature is above 65ćfor 2 minutes. The
indoor fan will be controlled by the thermostat. The outdoor system can be restarted
when the coil temperature is below 42ćand the system has been stopped for 3 minutes.
The malfunction will be stored in the malfunction resume and will not be revealed.
3.10 abnormal operation of indoor system
When the outdoor system operates, if the indoor system operation differs from the outdoor system, the abnormal
operation malfunction will be reported. 10s after the report, the indoor system will be closed.
Outdoor system mode Indoor system mode conflicts
cooling heating yes
cooling cooling no
cooling airflow no
heating heating no
heating airflow yes
heating cooling yes
３.11 Malfunction
Nothing is presented if there is no code list.
The malfunction display will automatically finish in 10 seconds.
The remote control only receives the sigals for stop. According to the signals, the malfunction
resume presentation finishes.
The resume restores after the power supply restores.
3.12 abnormality confirmation approaches.
3.12.1 indoor temperature sensor abnormality: under the operation, the normal temperature ranges from 120
degree to -30 degree. When the temperature goes beyond this range, the abnormality can be confirmed. If the
temperature goes back into the range, the system will automatically resume.
3.12.2 indoor heat interaction sensor abnormality: under the operation, the normal temperature ranges from 120
degree to -30 degree. When the temperature goes beyond this range, the abnormality can be confirmed. If the
temperature goes back into the range, the system will automatically resume.
3.12.3 Outdoor Abnormality Solve.
Out door malfunction: When the indoor system receives the outdoor malfunction codes, it will store the code
into E2 for the malfunction list resume. The indoor system will continue to operate according to the original
status, the malfunction code will not be revealed or processed.
3.12.4 transmission abnormality.
If the indoor system can’ t receive the outdoor systemfor 8 minutes, the communication abnormality can be

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confirmed and reported and the outdoor system will be stopped.
３.13 Special features
３.13.1 Single indoor system operation
* Enter condition: First, set the high speed airflow and 30 centigrade set temperature, then
press the dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings.
* After the system enters the separate indoor system operation mode, the indoor system will
operate according to the set mode and neglect the communication signals of the outdoor system.
However, it has to send signals to the outdoor system.
* Quitting condition: This mode can be quitted after receiving the quitting signal from the remote control or
urgency system. The indoor system thus can quit the single operation
３.13.2Power-off compensation.
* Entering condition: Press dormant button 10 times within 7 second, the buzzer will ring 4
times and the present system status will be stored into the EEPROM of the indoor system.
* After entering the power cut compensation mode, the processing of the indoor system should be as the
followings:
Remote control urgency singal: operate according to the remote control and the urgent conditions, the present
status will be stored into the EEPROM of the indoor system.
* Quitting conditions: Press dormant button 10 times within 7 seconds and the buzzer will ring twic
３.13.3.Fixed frequency operation.
３.13.3.1Fixed cooling: a. under G code condition: high speed cooling, set 16 ć, press
temperature
þ-þkey and the set key at the same time. The system will enter the fixed frequency
operation after the buzzer rings twice.
b. The proceeding programs are as the follows:
Entering the fixed frequency operation, you can set the fixed strength location 1 and send the
coolng signal to the outdoor system. Meanwhile, you can fix the indoor system at high speed
mode, the location of the airflow directin board can be switched to the maximal position.
c. Quitting condition: The fixed frequency cooling can be quitted after receiving the remote
signal, and the system will enter the remote setting status.
３.13.3.2. Fixed heating: a. under G code condition: high speed heating, set 30ć, press
temperature
þ+þkey and the set key at the same time. The system will enter the fixed frequency
operation after the buzzer rings twice.
b. The proceeding programs are as the follows:
Entering the fixed frequency operation, you can set the fixed strength location 1 and send the
heating signal to the outdoor system. Meanwhile, you can fix the indoor system at high speed
mode, the location of the airflow directin board can be switched to the maximal position.
c. Quitting condition: The fixed frequency heating can be quitted after receiving the remote
signal, and the system will enter the remote setting status.
３.14ˊOther additional functions.
３.14.1 Test program
First, connect the test program terminal on the mainboard, then connect the system to the power
circuit. The test program will operate as follows.
HV series display: The buzzer rings for one timeüthe signal will be sent to outdoor system
for 0.5 secondüthe violet is sent for 0.5-- the background light turns to whiteüthe back
ground light turns to whiteüthe background light turns to whiteüthe background light is fully
lighted for 0.5 secondüLCD screen lights for 0.5 secondüthe step-in motor fully output for
0.5 secondüthen the motor doesnÿt output for 0.5 secondüthe motor fully output again for

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0.5 second. The test program finishes.
Time cutting function: connect the test program terminal on the mainboard after connecting the
system to the power circuit. The CPU of the main control will be 60 times faster.
３.14.2 Display function
RUseries and LCD display
When the system starts up, the background and the LCD will be fully lighted for 3 seconds.
The background colour is white.
1) Three-color background
The multi-color indicator is not lighted when the system is off. The mode-switching will change
the indicator colors. Red color is for heating mode, blue for cooling, water color for demoisturing,
white for automatic mode, pink for airflow sending, green for health mode and yellow green for
air refreshing. The colors health, refreshing colors are preferred to the mode colors. If
different status exist at the same time, then the last set color will be shown. The lighting
key of the control board can turn on or off the display.
2) LCD display
*Set timing to display timing signs, set dormant mode to display dormant sign.(The dormant
signs will be shown on the G series panels.), set health mode to display health sign, set new
airflow mode to display new airflow sign and set violet disinfection to display health sign.
*Set auto, heating, demoisturing, heating to display the relative signs. When you use a remote
control to switch cooling, demoisturing and heating modes, the set temperature will be shown
and the screen board will return to the room temperature 5 seconds later. If you choose the airflow
sending mode, the screen board will show the room temperature directly.
*If the system is under malfunction status, the display will show the malfunction code. Please
refer to the malfunction list.
3.15 Malfunction display
The indoor system only reports the E1, E2, E7, E14, E4 malfunction. But E5 and E9 can be shown in the
malfunction resume.
The outdoor system displays the malfunction in the malfunction resume with a F in front. (HS series shows
the malfunctions in how many times the indicator lights flash
３．１５．１. The outdoor system
The outdoor system will decide the operation mode based on the principle of þfirst order
preferredÿaccording to the startup signals of the two indoor systems.
a) cooling: Under the cooling operation, the four direction latch will not be closed.
The outdoor fan will operate at the cooling mode. The compressor will operate under
the cooling frequency.
b) heating: Under the heating operation, the four direction latch will be closed. The
outdoor fan will operate at the heating mode. The compressor will operate under the heating
frequency. When frosts appear at the outdoor system, the system will enter into the
defrosting operation automatically. After the completion of the defrosting, the system will
be resumed.
３．１５．１．１ heat defrosting operation
Under the heating operation, when the indoor heat interaction temperature is below the
ambient temperature and the heat interaction temperature is below zero centigrade, the
frosts will appear on the heat exchanger. When the aggregated frost affects the heat
interaction, the defrosting operation will begin.

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３．１５．１.2 frost confirmation condition. When either of the following condition appears, the system
will enter the defrosting mode.
b) continuous operation for 47 minutes and Taı5ć, if Te İ-3ćfor 2 minutes.
b) continuous operation for 47 minutes and Ta˘5ć, if Teİ-7ćfor 2 minutes.
c) continuous operation for 47 minutes and Ta˘-3ć, if Teİ-9ćfor 2 minutes.
d) If Taİ-3ćand the compressor worked for 3 hours without a defrosting operation, the
system will process the defrosting for one time.
３．１５．１．２．１ Defrosting process: After entering the defrosting operation, the compressor and the
fan will be stopped. The four direction latch will be opened 30 seconds later. And the compressor
will restart 10 seconds later. The system begins the defrosting operation.
３．１５．１．2.2 defrosting quitting condition:
i) Time control: Defrosting time lasts 10 (EEPROM) minutes, the defrosting operation ends.
ii) Heat interaction control: When Teı14ć(
EEPROM ), the defrosting operation ends.
３．１５．1.2.3 Defrosting quitting process
After the completion of the defrosting, the compressor stops. 50 seconds later, the four
direction latch changes direction. 10 seconds later, the compressor will start and the original
heating operation resumes.
３．１５.1.2.4 After the entering into the frosting mode, the compressor will operate at least for
1 minutes before stopping the defrosting. (The timing starts as the four direction latch starts.)
３．１５．１．２．５ Outdoor main relay control
The outdoor main relay closure will be delayed for 2 seconds after connecting to the circuit.
３．１５．１．２．６ Outdoor airflow control
３．１５．１．２．７ airflow control at the cooling mode.
After the compressor is turned on for 5 seconds, the outdoor fan will start at a high speed.
10 seconds later, the speed will be controlled according to the outdoor ambient temperature.
If the outdoor has only two option, M operates on H and L operates on L.
When the outdoor speed is M or L, the speed will change according to the heat interaction
temperature. The status will be checked every minute.
Ta>28ćˈhigh speed
26ć<Ta<28ćˈ high/ low speed
Ta<26ć˖ Te
40ćˈhigh speed
37
ćTe<40ćˈhigh/ medium speed
35
ćTe ˈmedium speed
30
ćTe<35ćˈmedium/ low speed
Te<30ćˈlow speed
3.15.1.2.8 the speed control under the heating mode
The outdoor speed varies according to the outdoor ambient temperature. M operates on H under
the two option mode.
Ta =24ć
Outdoor speed˖
Ta =16ć
Ta =10ć
Ta =20ć
LMHM L

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Ta>24ćˈlow speed
24ć>Ta>20ćˈlow speed/ medium speed
Ta>16ćˈmedium speed
16ć>Ta>10ćˈmedium/high speed
Ta<10ćˈhigh speed
3.15.1.2.9 Outdoor four direction control
Under the cooling mode, the outdoor four direction latch is not closed. Under the heating mode,
the latch can be closed. When the heating compressor stops, the four direction latch will be
closed 100 seconds later. The latch control under the defrosting operation has been discussed
in the þdefrosting operationÿ.
３．１５．１．３compressor frequency control
３．１５．１．３．１ fixed test frequency
There are two methods for the fixed test frequency operation of the outdoor system.
１) the indoor system can be controlled manually. (refer to the indoor system specification).
３．１５．１．３．２ If the indoor system has the fixed frequency test operation function, then the outdoor
system will calculate the fixed frequency according to the number of the turned on systems and
operate on the calculated frequency until the indoor system quit the test operation. When the
two indoor systems are turned on at the same time, the outdoor system will enter the operation
mode if either of the indoor systems sends the fixed test frequency.
２) The outdoor fixed frequency is set according to the indoor system signals. The operation
is on the frequency stored in EEPROM
３) The cooling and heating value under the double system operation
Under the single system fixed frequency test, the outdoor system will operate according to the
turned-on indoor system status. The operation will on the frequency relative to the status.
Under the double system operation test, the outdoor system will automatically operates on the
double system fixed test frequency.
３．１５．１．３．３ Normal operation frequency control
Under the outdoor system normal operation, the fixed frequencies of different indoor systems
should be tested according to the different capacity of the respective indoor systems. Then
the outdoor system will decide the operation frequency according to the fixed frequencies, the
difference between set temperature and the indoor temperature and the indoor fan speed.
３．１５．１．３．４ When the system is turned on for the first time, the frequency will be raised to
the maximal rating and operates on it for 30 minutes. Then, whether the present indoor
temperature difference changes or not, the frequency will fall to the rate corresponding to
the capacity of the indoor systems.
３．１６ malfunction and protection
３．１６.1 cooling frosting protection
１) If an indoor system Teİ0ćfor 5 minutes, then the indoor system will send the indoor off

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signal to the outdoor system and the indoor frosting malfunction will be reported (the function
can be completed within the indoor system.) After the outdoor system receives the off signal,
the corresponding electronic latch will be closed. If the two indoor systems are both off, the
outdoor compressor will be turned off. (when both systems are turned on, the lowest indoor coil
will be preferred.)
２) If indoor system Teı7ć, the frosting protection operation and the frequency control will
be quitted.
３) If the indoor system TeıT1ć, the rise of the compressor frequency will be allowed.
４) If the indoor system T1-1ćİTeİT1ć, the compressor frequency will not change
５) If the indoor system Te˘T1-1ć, the compressor frequency will begin to fall.
３．１６．２ Cooling overloading protection
１) If the outdoor TeıTx ćfor 10 seconds, the outdoor compressor will stop and the cooling
overloading will be reported. Tx is adaptable in EEPROM.
ii) If the outdoor system Teİ50ć, cooling overloading protection will be quitted.
１)If the outdoor system TeİT1ˉ2ć, the rise of the compressor frequency will be
allowed.
２)If the outdoor system TeİT1ć, the compressor frequency will not change
３)If the outdoor system Te˚T1ć, the compressor frequency will begin to fall.
３．１６．３ heating overload protection
１) If an indoor system TeİTx ćfor 10 seconds, the indoor system will send the indoor off
signal to the outdoor system and the indoor heating overload will be reported. (the function
is completed in the indoor system.) After the outdoor system receives the off signal, the
corresponding electronic latch will be closed. If the two indoor systems are both off, the
outdoor compressor will be turned off. (when both systems are turned on, the lowest indoor coil
will be preferred.)
２) if the indoor system Teİ50ć, the heating overloading protection will be quitted.
３) if the indoor system TeİT1ˉ2ć, the rise of the compressor frequency will be allowed.
４) If the indoor system TeİT1ć, the compressor frequency will not change.
５) If the indoor system Te˚T1ć, the compressor frequency will begin to fall.
３．１６．４ current overcharge
１) when the outdoor system currentıI0ˇ2A, the outdoor system stops and the current
charge is reported.
２) When the outdoor system currentıI0ˇ0.5A, the outdoor system begins frequency
reducing.
３) When the outdoor system currentıI0ˉ0.5A, the outdoor system frequency will not
change.
４) When the outdoor system current˘I0ˉ0.5A, the outdoor system frequency will
rise.
５) The difference between the heating mode I0and the cooling mode I0will stored in
EEPROM.
３．１６．５ Voltage over/under load protection.
１) The AC voltage operation range is between 175V-253VDŽ, the compressor will be stopped

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if the voltage surpasses this range.
２) When the AC voltage returns to normal, the outdoor system return to the normal operation
mode.
３．１６．６ Compressor overheating protection
１) If the compressor outlet temperature Tdı120ćfor 10 seconds (adaptable in EEPROM), the
outdoor compressor stops and the compressor overheating is reported.
２) If Tdİ90ć, the system quits the protection and returns to normal.
１) If the top switch of the compressor is opened by overheating, the outdoor system
will be stopped. The system will resume if the switch is closed again.
２) If TdıT1ˇ2ć, the compressor frequency falls.
３) If TdıT1ć, the compressor frequency will not change.
４) If TdıT1ˉ2ć, the compressor frequency will rise.
３．１６．７ Three minutesÿwaiting mode protection
1) No matter caused by which condition, the outdoor compressor is not allowed to be restart
within 3 minutes after a compressor shut down.
2) If the compressor shut down is caused by malfunctions and the malfunction is corrected 3
minutes after, the compressor can restarted of the correction at once.
３．１６．８ Intelligent power module protection.
１) Under the compressor operation, if the IPM protection happens under the voltage over/under
loading, over heating or current overcharge, the compressor will stop and restart 3 minutes
later.
２) If the IPM protection happens 4 times continuously, the compressor will be totally turned
off and can be restarted only by a second connection to the power supply.
３．１６．９ Sensor malfunction protection.
１) There are 6 sensors in the outdoor system. The outdoor system will stop if any of the six
sensors has malfunctions. The malfunction will be reported respectively.
２) After the malfunction has been corrected for 3 minutes, the system can be restarted.
Outdoor restriction condition codes display:
When the outdoor system operates, because of the various temperature or electrical device
restrictions, the compressor has to ensure the maximal output within a safe frequency range.
This restriction condition only represent the most possible condition at the time, can only
be used as a reference in experiments.
1 Normal, no restriction
2 Power voltage restriction
3 outdoor heat interaction restriction under the cooling mode; indoor heat
interaction under the heating mode.
4 main current restriction
5 outlet temperature restriction
6 indoor heat interaction temperature restriction. (frosting prevention)
7 Indoor fan speed restriction
8 Outdoor frequency conversing voltage restriction
Note: A adaptable potentiometer is connected to the CN15 pin of the PCB board. The
compressor frequency can be controlled by the switching of the voltage of the system.
３．１７ Outdoor electronic inflation latch control

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３．１７.1 There are two electronic latches in the outdoor system. When the outdoor system is
connected to the power for the first time, the two latches will be closed and then be opened
to the default width.
３．１７．２ When the outdoor system is at the off status, the two latches will be both opened.
３．１７．３ After the compressor startup, the outdoor system will decide the status of the two
latches according to the different indoor system situation. The latch corresponding to the
turned indoor system will be firstly opened to the default width and then be changed according
to the temperature. The latch corresponding to the turned off indoor system will totally closed
under the cooling mode. This latch will be opened and closed continuously under the heating
mode. The opening and closing intervals can be controlled in E2.

Temp.（℃） Resistor（Kȍ）
-30 12061.74384
-29 11267.87303
-28 10531.36947
-27 9847.72399
-26 9212.810101
-25 8622.849109
-24 8074.378678
-23 7564.224409
-22 7089.474144
-21 6647.454718
-20 6235.710914
-19 5851.986393
-18 5494.206405
-17 5160.462104
-16 4848.996317
-15 4558.190602
-14 4286.553499
-13 4032.709832
-12 3795.390981
-11 3573.426022
-10 3365.733648
-9 3171.314807
-8 2989.24599
-7 2818.673094
-6 2658.805826
-5 2508.912585
-4 2368.315784
-3 2236.387565
-2 2112.545886
-1 1996.250929
0 1887.001811
1 1784.333571
2 1687.814404
3 1597.043119
4 1511.646814
5 1431.278731
6 1355.616286
7 1284.359266
8 1217.228156
9 1153.96261
10 1094.32004
Outdoor Exhaust temp.sensor
R80℃=50Kȍ+3%
B25℃/80℃=4450K±3%
4. Thermistor resistance chart
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