York ERJC 36 User manual

by johnson controls
ERJC 36, 42 R
Heat pump Multisplit Inverter Condensing units
Installation Instructions
Johnson Controls Manufacturing España, S.L. is participating in the EUROVENT Certication Programme.
Products are as listed in the EUROVENT Directory of Certied Products, in the program AC1, AC2,
AC3, LCP and FC.
The LCP program covers air condensed water chillers and heat pumps of up to 600 kW
Ref:
GB

User Notice
The total capacity of the indoor units which runs at the same time can not exceed 150% of
that of the outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be poor.
Switch the main power on 8 hours before start the unit, helpful for a successful startup.
It is a normal phenomenon that the indoor unit fan will still run for 20~70 seconds after the
indoor unit receives the “stop” signal so as to make full use of after-heat for the next operation.

they can back to the normal condition by harmonizing their running modes: the cooling mode is
compatible with the dehumidifying mode and the fan mode can go with any other mode. If the
supply power fails when the unit is running, then the indoor unit will send the “start” signal to the
outdoor unit three minutes later after power recovery.
During installation, the communication cable and the power cord must not be twisted
together but instead separated with an interval of at least 2cm; otherwise the unit is likely to run
abnormally.
Cautions for the Debugging and Maintenance Personnel:
During debugging and maintenance, prior to the startup of the compress make sure the heating
belt of the compressor has been energized for at least eight hours! Once the compressor is started,
it must be guaranteed that it works continuously for at least 30 minutes, otherwise it would be
damaged!
This series outdoor units are matched with the free macth series R410A GMV multi VRF
indoor units under the same working conditons exported to European Union.
This product must not be disposed together with the domestic waste. This product
has to be disposed at an authorized place for recycling of electrical and electronic
appliances.
Thank you for purchasing YORK air conditioners. Before use, please read this manual
carefully and keep it properly for further reference.

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Contents
Safety Precautions....................................................................................... 4
Installation Instructions............................................................................... 5
1 Installation Location and Matters Needing Attention.......................................... 5
2 Installation of the Outdoor Unit........................................................................... 7
3 Connection between Indoor and Outdoor Units .................................................. 9
4 Refrigerant Charging and Trial Running.................................................................. 11
Working Principles of the Unit ................................................................. 14
Parts and Components of the Unit ............................................................ 15
Maintenance.............................................................................................. 16
1 Check before the Seasonal Use ......................................................................... 16
2 Check after the Seasonal Use ............................................................................ 16
Troubleshooting ........................................................................................ 17
1 Please check the following items before contact the maintenance serviceman. 17
................................. 18
3 Error description ................................................................................................ 18
4 After-Sales Service ............................................................................................ 24
Function Description................................................................................. 25
Performance Parameters ........................................................................... 26

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Safety Precautions
1
ⅠSafety Precautions
Please read this manual carefully before use and operate correctly as instructed in this manual.
Please especially take notice of the following two symbols：
Warning! It indicates improper operation which will lead to human casualty or sever injury.
Cuation! It indicates improper operation which will lead to injury or property damage.
Warning!
◆The installation should be committed to the appointed service center; otherwise it all cause water
leakage, electric shock or re etc.
◆Please install the unit where is strong enough to withstand the weight of the unit; otherwise, the unit
would fall down and cause injury or death.
◆The drain pipe should be installed as instructed in the manual to guarantee the proper drainage;
meanwhile it should be insulated to prevent condensing; otherwise the improper installation would cause
water leakage and then wet the household wares in the room.
◆ Do not use or place any inammable or explosive substance near the unit.
◆Under the occurrence of an error (like burning smell etc.), please cut off the main power supply of the
unit.
◆ Keep good ventilation in the room to avoid oxygen decit.
◆ Never insert your nger or any other object into the air outlet/inlet grille.
◆Please take notice of the supporting frame of the unit to see if it is damaged over the long time period
of use.
◆ Never ret the unit and contact the sales agent or the professional installation personnel for the repair
or relocation of the unit.
◆Non-professional personnel are prohibited to dismantle the electric box owing to the high voltage of
the outdoor unit.
An all-pole disconnection switch having a contact separation of at least 3mm in all poles should be
connected in xed wiring.
Cuation!
◆ Before installation, please check if the power supply corresponds with the requirement specied on the
nameplate and also check its security.
◆Before use, please check if the piping and wiring are correct to avoid water leakage, refrigerant
leakage, electric shock, re etc.
◆The main power supply must be earthed to avoid the hazard of electric shock and never connect this
earth wire to the gas pipe, running water pipe, lightening rod or phone cable’s earth lead.
◆ Turn off the unit after it runs at least ve minutes; otherwise its service life will be shortened.
◆Do not allow children operate this unit.
◆Do not operate this unit with wet hands.
◆ Cut off the main power supply prior to the cleaning of the unit or the replacement of the air lter.
◆When the unit is not to be used for a long time, please cut off the main power supply of the unit.
◆Do not expose the unit to the moist or corrosive circumstances.
◆Never step on the unit or place any object on it.
◆It is suggested to have a power-on test annually.

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Installation Instructions
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Installation Instructions
1 Installation Location and Matters Needing Attention
The installation of the unit must comply with the national and local safety regulations. The
installation quality directly affects the normal use, so the user should not carry out the installation
personally. Instead, the installation and debugging should be done by the professional personnel.
Only after that, can the unit be energized.
a. How to select the installation location for the indoor unit
1) Where there is no direct sunlight.
2) Where the top hanger, ceiling and the building structure are strong enough to withstand the weight of
the unit.
3) Where the drain pipe can be easily connected to outside.
5) Where the refrigerant pipe of the indoor unit can be easily led to outside.
7) Where there is no corrosive gas, heavy dust, salt mist, smog or moisture.
b. How to select the installation location for the outdoor unit
1) The outdoor unit must be installed where the bearing surface is stable and secure enough.
2) The outdoor unit and indoor unit should be placed as close as possible to minimize the length and
bends of the refrigerant pipe.
3) Do not install the outdoor unit under the window or between the buildings to prevent the normal
running noise entering the room.
5) The outdoor unit should be installed where ventilation is in good condition so that the unit can take in
and discharge enough air.
dust, salt fog and other severely polluted air.
No air guiding pipe is allowed to be installed at the air inlet/outlet of the outdoor unit. Under
the heating mode, the condensate water would drip down from the base frame and would be frozen
when the outdoor ambient temperature is lower than 0ºC（32 ºC）. Besides, the installation of the
outdoor unit should not affect the heat radiation of the unit.
CUATION ！
The unit installed in the following places is likely to run abnormally. If unavoidable, please contact the
professional personnel at the YORK appointed service center. ①where is full of oil; ②alkaline soil off the
sea; ③where there is sulfur gas（like sulfur hot spring）; ④where there are devices with high frequency
(like wireless devices, electric welding devices, or medical equipments); ⑤special circumstances.
c. Electric Wiring
1) The installation must be done in accordance with the national wiring regulations.
2) Only the power cord with the rated voltage and exclusive circuit for the air conditioning can be used.
3) Do not pull the power cord by force.
4) The electric installation should be carried out by the professional personnel as instructed by the local
laws, regulations and also this manual.
5) The diameter of the power cord should be large enough and once it is damaged it must be replaced by

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Installation Instructions
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the dedicated one.
6) The earthing should be reliable and the earth wire should be connected to the dedicated device of the
building by the professional personnel. Besides, the air switch coupled with the leakage current protection
switch must be equipped, which is of enough capacity and of both magnetic and thermal tripping functions in
case of the short circuit and overload.
Table 1
Models Power Supply Capacity of the Air Switch Recommended Cord
（pieces× sectional area）
ERJC(36)R 220-240V~ 50Hz 32A 6mm2×3
ERJC(42)R 220-240V~ 50Hz 32A 6mm2×3
d. Earthing Requirements
2) The yellow-green line of the air conditioner is the earth line and can not be used for other purpose, cut
3) The reliable earth terminal should be provided and the earth wire can not be connected to any of the
following places.
①. Running water pipe;
②. Coal gas pipe;
③. Sewage pipe;
④. Other places where the professional personnel think unreliable.
ERJC(42)R
Fig.1
POWER
INDOOR UNIT AINDOOR UNIT BINDOOR UNIT CINDOOR UNIT D
OUTDOOR UNIT
INDOOR UNIT E
XT2
XT1
XT3
XT4
XT5
XT6
N
L

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Installation Instructions
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ERJC(36)R
Fig.2
e. Noise Precautions
1) The air conditioning unit should be installed where ventilation is in good condition, otherwise the
working capability of the unit would be reduced or working noise would be increased.
2) The air conditioning unit should be installed on the base frame which is stable and secure uncouth to
withstand the weight of the unit; otherwise it would incur vibration and noise.
3) During the installation, a consideration should be taken that the produced hot air or noise should not
affect neighbors and surroundings.
4) Do not stack obstacles near the air outlet of the outdoor unit; otherwise it would reduce the working
capability of the unit or increase the working noise.
5) In the event of the occurrence of abnormal noise, please contact the sales agent as soon as possible.
f. Accessories for Installation
Refer to the packing list for the accessories of the indoor and outdoor units respectively.
2 Installation of the Outdoor Unit
a. Precautions for the Installation of the Outdoor Unit
The following rules should be followed when the installation location is being considered so as to let the
unit run well enough.
1) The discharged air from the outdoor unit won’t return back and enough space should be left for
maintenance around the unit.
2) The installation location should be in good condition so that the unit is able to take in and discharge
enough air. Besides, make sure there is no obstacle at the air inlet/outlet of the unit. If there is, remove it.
3) The unit must be installed where it is secure enough to support the weight of the unit and capable of
reducing to some extent noise and vibration to make sure they do not bother your neighbors.
4) The designated lifting hole must be used for lifting the unit and protect the unit carefully during lifting
to prevent damaging the mental sheet which would result in rusting in future.
5) The unit should be installed where there is as little as direct sunlight.
6) The unit must be installed where the rain water and defrosting water can be drained.
7) The unit must be installed where the unit won’t be covered by the snow and won’t be affected by
rubbish and oil fog.
8) Rubber or spring shock absorbers should be used during the installation of the outdoor unit to meet the
noise and vibration requirements.
9) The installation dimensions should meet the requirement covered in this manual and the outdoor unit
10) The installation should be carried out by the professionally skilled personnel.
b. Installation of the Outdoor Unit
1) Outline Dimension of the Outdoor Unit.
POWER
INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C INDOOR UNIT D
XT5X T4 XT3X T2 XT1
OUTDOOR UNIT
NL

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Installation Instructions
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ERJC(36)R ERJC(42)R
Fig.3 Fig. 4
2) During the transportation of the outdoor unit, two lifting ropes long enough must be used in four
directions and the separation angle must be less than 40°prevent the center of unit deviating.
he support leg and base frame of the unit.
4) The unit should be installed on a concrete base frame with a height of 10cm.
5) The installation space of the unit should be as required in Fig.5.
Installation Space Requirements of the Outdoor Unit: ERJC(36)R 、ERJC(42)R
Fig.5
3 Connection between Indoor and Outdoor Units
a. Wiring of the Power Cord
CAUTION ！
A breaker must be installed, capable of cutting off the power supply for the whole system.
1) Open the side plate.
2) Let the power cord go through the rubber ring.
3) Connect the power card to the terminals “L”, “N” and also the earthing bolt, and then connect the
wiring terminals “N(1),2,3” of the indoor unit to those of the outdoor unit correspondingly.
4) Fix the power cord with wire clips.
572
378
1022
950
840
96 350
76
110
412
340
192
76
45099
1015
1103
1087
191631
440
401
362
121
＞500
＞500
＞500
＞500
＞2000
＞1000
＞2000

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Installation Instructions
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b. Capacity Level and Capacity Code of the Indoor and Outdoor Units
Table 2
Capacity Level Capacity Code
Indoor Unit
09 25
12 35
18 50
21 60
24 71
Outdoor Unit
36 100
42 120
1) The outdoor unit with capacity level 36 can drive up to four sets of indoor units, while the outdoor unit
42 can drive up to ve.
2) The sum of the capacity codes of the indoor units should be among 50%-150% of that of the outdoor
unit.
c. Allowable Length and Height Fall of the Refrigerant Pipe
Table 3
Allowable Length Refrigerant Pipe
36 42 36 42
Total Length(m) 70 80 L1+L2+L3+ L4L1+L2+L3+ L4+ L5
Max. Length for Single Unit(m) 20 25 LX
Max.
installation
altitude
Outdoor unit
and indoor unit 15 15 H1
Indoor unit and
indoor unit 7.5 7.5 H2
Table 4: Dimension of the Refrigerant Pipe of the Indoor Unit unit：mm
Capacity Level of the Indoor Unit Gas Pipe Liquid Pipe
09,12 φ9.52 φ6.35
18 φ12.7 φ6.35
21,24 φ15.9 φ9.52
d. Piping between the Indoor and Outdoor Units
1) Refer to Fig.6 for the moments of torque for tightening screws.
2) Let the are end of the copper pipe point at the screw and then tighten the screw by hand.
3) After that, tighten the screw by the torque wrench unit it clatters (as shown in Fig.6).
4) The bending degree of the pipe can not be too small; otherwise it will crack. And please use a pipe
bender to bend the pipe.
5) Wrap the exposed refrigerant pipe and the joints by sponge and then tighten them with the plastic tape.

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Installation Instructions
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Fig. 6
Table 5：Moments of Torque for Tightening Screws
Diameter Wall Thickness（mm）Moment of Torque
φ6.35mm ≥0.5 15-30(N·m)
φ9.52mm ≥0.71 30-40(N·m)
φ12.7mm ≥1 45-50(N·m)
φ15.9mm ≥1 60-65(N·m)
CUATION ！
① .
During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor
unit by force; otherwise the capillary pipe or other pipe may crack, which then would result in leakage.
② .
The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of
it.
CUATION ！
For the GMV multi VRF system, each pipe should be labeled to tell which system it belongs to avoid
mistaken inaccurate piping.
e. Installation of the Protection Layer of the Refrigerant Pipe
1) The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent
condensing and leaking.
2) The joints of the indoor unit should be wrapped with the insulating material and no gas is allowed on
the joint of the indoor unit, as shown in Fig.7.
No gap
Fig.7
CUATION ！
After the pipe is protected well enough, never bend it to form a small angle; otherwise it would crack or
break.
f. Wrapping the pipe with tape
Pipe Flare Nut Pipe
Torque Wrench
Ordinary

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Installation Instructions
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1) Bundle the refrigerant pipe and electric wire together with tape, and separate them from the drain pipe
2) Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall.
During the wrapping, the later circle should cover half of the former one.
3) Fix the wrapped pipe on the wall with clamps.
CAUTION ！
①. Do not wrap the pipe too tightly; otherwise the insulation effect would be weakened. Additionally,
make sure the drain hose is separated from the pipe.
②.
room.
4 Refrigerant Charging and Trial Running
a. Refrigerant Charging
1) The refrigerant has been charged into the outdoor unit before shipment, while additional refrigerant
2) Check if the liquid valve and the gas valve of the outdoor unit are closed fully.
by the vacuum pump.
“LO” knob
Manometer Manometer
“HI” knob
Vacuum pump
Hose
Gas Valve
Fig.8
4) When the compress is not running, charge the R410A refrigerant into the refrigerant pipe from the
liquid valve of the outdoor unit (do not do it from the gas valve).
b. Calculation of the Additional Refrigerant Charge
1) Refrigerant Charge in the Outdoor Unit before Shipment
Table 6
Model ERJC(36)R ERJC(42R
Refrigerant Charge (kg) 3.6 4.8
Notes：
①. The refrigerant charge mentioned in the table above is not included those charged additionally in the
indoor unit and the refrigerant pipe.
②. The amount of the additional refrigerant charge is dependent on the diameter and length of the liquid
refrigerant pipe which is decided by the actual yield installation requirement.
③. Record the additional refrigerant charge for future maintenance.
2) Calculation of the Additional Refrigerant Charge
If the total refrigerant pipe length (liquid pipe) is smaller than that listed in the table below, no additional

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Installation Instructions
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refrigerant will be charged.
Table 7
Model Total Liquid Pipe Lenght (a+b+c+d+e)
ERJC(36)R ≤40m
ERJC(42)R ≤50m
Additional Refrigerant Charge2=∑Extra Liquid Pipe Length×22g/m(liquid pipe 1/4’’).
Note: if the total refrigerant pipe length is larger than that listed in the table above, the additional
refrigerant for the extra length of the pipe needs to be charged as per 22g/m.
3) Example : ERJC (42) R
Fig.9
Table 8 Indoor Unit
Serial No. Model
Indoor Unit ⑤Ducted Type EUKC(09)R
Indoor Unit ④Ducted Type EUKC(09)R
Indoor Unit ③Ducted Type EUKC(09)R
Indoor Unit ②Ducted Type EUKC(09)R
Indoor Unit ①Ducted Type EUKC(18)R
Table 9 Liquid Refrigerant Pipe
Serial No. e d c b a
Diameter φ6.35 φ6.35 φ6.35 φ6.35 φ9.52
Length 20m 20m 15m 5m 5m
The total length of each liquid refrigerant pipe is: e+d+c+b+a=20+20+15+5+5=65m. Thus, the minimum
additional refrigerant charge=(65-50)×0.022=0.33kg (Note: no additional refrigerant is needed for the liquid
pipe within 50m).
4) Additional Refrigerant Charge Record
Table 10 Indoor Unit
No. Indoor Unit Model Additional Refrigerant Charge(kg)
1
2
……
N
Total
a
b
c
d
e

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Installation Instructions
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Table 11 Refrigerant Pipe
Diameter Total Length(m) Additional Refrigerant Charge(kg)
Φ15.9
Φ12.7
Φ9.52
Φ6.35
Total
c. Items to be checked after the Installation
Table 12
Items to be Checked Possible Errors Check Results
Has each part and component the of unit
installed securely?
The unit may fall off, vibrate or generate
noise.
Has the gas leakage test been taken? The cooling (heating) capacity may be
poor.
Is the thermal insulation sufcient? Dews and water drops may be generated.
Does the drainage go well? Dews and water drops may be generated.
Is the actual power voltage in line with
the value marked on the nameplate?
The unit may break down or some
components may be burnt out.
Are the wiring and the piping correct? The unit may break down or some
components may be burnt out.
Has the unit been earthed reliably? There may be a danger of electric shock.
Does the wire meet the regulated
requirement?
The unit may break down or the
component may be burnt out.
Is there any obstacle at the air inlet/outlet
of the indoor/outdoor unit?
The cooling (heating) capacity may be
poor
Have the length of the refrigerant pipe
and the refrigerant charge been recorded?
It may be hard to know the exact
refrigerant charge.
d. Trial Running
1) Check before the Trial Running
① .
Check if the appearance of the unit and the piping system are damaged during the transportation.
② .
Check if the wiring terminals of the electronic component are secure.
③ .
Check if the rotation direction of the fan motor is right.
④ .
Check if all valves in the system are fully opened.
2) Trial Running
① .
The trial running should be carried out by the professionally skilled personnel on the premise that all
items listed above are in normal conditions.
② .
Let the unit energized and switch the wired controller or the remoter controller to “ON”.
③ .
The fan motor and compressor of the outdoor unit will run automatically in one minute.
④ .
If there is some unusual sound after the compressor is started, turn off the unit for an immediate
check.

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Working Principles of the Unit
11
ⅢWorking Principles of the Unit
Schematic Diagram of Free Match Series Inverter Heat Pump Multi VRF System
Fig. 10 Schematic Diagram of Free Match Series Inverter Heat Pump Multi VRF System
The outdoor and indoor units start to work once the power is switched on. During the cooling operation,
the low temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together
and then is taken into the compressor to be compressed into high temperature, high pressure gas, which will
soon go to the heat exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into
refrigerant liquid. After passing through the throttling device, the temperature and pressure of the refrigerant
liquid will further decrease and then go the main valve. After that, it will be divided and go to the heat
exchanger of each indoor unit to exchange heat with the air which needs to be conditioned. Consequently, the
refrigerant liquid become low temperature, low pressure refrigerant gas again. Such a refrigeration cycle goes
round and round to achieve the desired refrigeration purpose. During the heating operation, the four-way valve
is involved to make the refrigeration cycle run reversely. The refrigerant radiates heat in the heat exchanger of
the indoor unit (so do the electric heating devices) and absorb heat in the heat exchanger of the outdoor unit
for a heat pump heating cycle so as to achieve the desired heating purpose.
M

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Parts and Components of the Unit
12
ⅣParts and Components of the Unit
System Structure
Fig. 11
For the free match series DC inverter GMV multi VRF air conditioning system, one outdoor unit is able to
drive up to ve indoor units which can be cassette type, duct type, wall-mounted or oor ceiling type. Among
them, the cassette type and the wall-mounted indoor units should be controlled by the remote controller, while
the ducted type can be controlled by either the remote controller or the wired controller. The outdoor unit will
run as long as any one indoor unit receives the running command, and all indoor units stops once the outdoor
units is turned off.
Wall Mounted
Indoor Unit
Cassette Type
Indoor Unit
Duct Type Indoor
Unit(Round air
outlet)
Duct Type Indoor
Unit(Rectangular
air outlet)
Outdoor Unit

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Maintenance
13
Maintenance
WARNING ！
①. The unit can only be cleaned after the unit is turned off and the main power is cut off; otherwise it
would cause an electric shock hazard.
②. Do not dampen the air conditioner, as it would cause a electric shock hazard and never rinse the unit
with water in any event.
CUATION ！
①. Volatile liquid, like thinner, gasoline etc would damage the appearance of the air conditioning unit.
(Only use the soft dry cloth or the wet cloth with neutral detergent clean the outer shell of the air conditioning
unit)
②. Do not clean the outer shell of the air conditioning unit with more than 45 ºC hot water to prevent
discoloration or deformation.
③.
1 Check before the Seasonal Use
1) Check if the inlet/outlet of the indoor/outdoor unit is clogged.
2) Check if the earth lead is earthed reliably.
3) Check if the batteries of the remote controller are replaced.
5) Check if the installation of the outdoor is secure. If there is something abnormal, please contact the
YORK appointed service center.
6) When restarting the unit which is not used for a long time, switch on the main power supply eight
hours ahead, helpful for a successful startup.
2 Check after the Seasonal Use
units.
2) Cut off the main power supply of the air conditioning system.
3) Remove the dust and the foreign matters of the outdoor unit.
4) In the event of rusting, use the anti-rust paint to stop spreading of rust.
Refer to the Installation and Operation Manualof each indoor unit respectively for detailed
maintenance.

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Troubleshooting
14
Troubleshooting
WARNING ！
①. In the event of abnormal conditions (like, stinky smell), please shut off the main power supply
immediately and then contact the YORK appointed service center; otherwise the continuous abnormal running
YORK
would damage the air conditioning unit and also would cause ele
②. Do not repair the air conditioning personally but instead contact the professionally skilled personnel
1 Please check the following items before contact the maintenance serviceman.
Table 13
Conditions Causes Corrective Actions
The unit does not run
Broken fuse or opened breaker Change the fuse or close the breaker
Power off Restart the unit when power on
Loosened power supply plug. Plug the power supply properly.
of the remote controller Change new batteries
Remoter controller out
of the control scope Keep the control distance within 8 meters.
The unit stops soon
after it starts
Clogged inlet/outlet of the
indoor/outdoor unit Clear the obstacle
Cooling/Heating
is abnormal
Clogged inlet/outlet of the
indoor/outdoor unit Clear the obstacle
Improperly set temperature Adjust the setting of the remote
or wired controller.
Too low set fan speed Adjust the setting of the remote
or wired controller.
Incorrect air direction Adjust the setting of the remote
or wired controller.
Opened door and window Close the door and window
Direct sunlight Hang a curtain or blinds over the window.
Too much people in the room
Too much heat sources in the room Reduce the heat sources
Note:
If the air conditioner still runs abnormally after the above check and handling, please contact the
maintenance serviceman at the local appointed service center and also give a description of the error occurred
as well as the model of the unit.

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Troubleshooting
15
2 The conditions listed below are not classied into errors
Table 14
Conditions Causes
The unit does not run
When restart the unit soon after it is
stopped.
The overload protection switch of the unit
let the startup delayed for three minutes.
As soon as power is on. The unit will stand by for approximate
one minute.
The unit blows out mist When the cooling operation starts. The hi-humidity air indoor is cooled
quickly.
The unit generates noise
The unit “clatters” as soon as it starts
running.
It is the sound generated during the
initialization of the electronic expansion
valve.
The unit “swishes” during the cooling
operation.
It the sound when the refrigerant gas runs
inside the unit.
The unit “swishes” when it is started or
stopped.
It is the sound when the refrigerant gas
stops running.
The unit “swishes” when in it is and
after the running.
It is the sound when the draining system
is operating.
The unit “squeaks” when it is in and
after the running.
It is the sound of frication generated by the
skin plate etc which swells due to the
temperature change.
The unit blows out dust. When the unit restarts after it is not
used for a long time. The dust inside the unit is blown out again.
The unit emits odors. When the unit is running. The odors absorbed in are blown out again.
3 Error description
If some error occurs when the unit is running, the error code will be displayed on the wired controller and
the main board of the outdoor unit.See the table before for more details about the meaning of each error.
Table 15
Residential
AC Errors
Commerical
AC Errors
Outdoor
Unit
"88"
Display
Indicating Lamp Lamp
Panel
"88"
Display
(Floor
Ceiling
Type)
Wired
Controller
Display
Running Cooling Heating
/Defrosting
mode 1 08 / / / / /
/Defrosting
mode 2 0A / / / / /
/heating overload
protection 0C Flash 3 times
Flash 3
times
Flash 3
times /oE
/Normal running ON / / / / /
Short/open
circuit of the
liquid valve
temperature
sensor
Short/open
circuit of he
liquid valve
temperature
sensor
Shown
as Table
16
/Flash 19
times /b5 b5
Short/open
circuit of the
gas valve
temperature
sensor
Short/open
circuit of the
gas valve
temperature
sensor
Shown
as Table
16
/Flash 22
times /b7 b7

by johnson controls
19
Troubleshooting
16
Refrigerant
insufciency
or blockage
protection
(available for
the residential
outdoor unit)
Refrigerant
insufciency
or blockage
protection
(available for
the residential
outdoor unit)
F0 /Flash 10
times /oE oE
Short/open
circuit of the
indoor ambient
temperature
sensor
Short/open
circuit of the
indoor ambient
temperature
sensor
Shown
as Table
16
/Flash
once /F1 F1
Short/open
circuit of
the indoor
evaporator
Short/open
circuit of
the indoor
evaporator
Shown
as Table
16
/Flash
twice /F2 F2
Short/open
circuit of the
of the outdoor
ambient
temperature
sensor
Short/open
circuit of the
of the outdoor
ambient
temperature
sensor
F3 /Flash 3
times /F3 F3
Short/open
circuit of the
temperature
sensor at the
midway of
the condenser
coil ( for the
commercial unit)
Short/open
circuit of the
temperature
sensor at the
midway of
the condenser
coil ( for the
commercial unit)
F4 /Flash 4
times /F4 F4
Short/open
circuit of
the outdoor
discharge
temperature
sensor
Short/open
circuit of
the outdoor
discharge
temperature
sensor
F5 /Flash 5
times /F5 F5
Oil returning
in cooling
Oil returning
in cooling F7 / / / / /
System high
pressure
protection
System high
pressure
protection
E1 Flash
once / / E1 E1
Anti-freezing
protection
Anti-freezing
protection E2 Flash twice / / E2 E2
System low
pressure
protection
(reserved)
System low
pressure
protection
E3 Flash 3
times / / E3 E3
Compressor
discharge high
temperature
protection
Compressor
discharge high
temperature
protection
E4 Flash 4
times / / E4 E4
Whole unit
over-current
protection
Whole unit
over-current
protection
E5 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Communication
error between
the indoor and
outdoor units
Communication
error between
the indoor and
outdoor units
Shown
as Table
16
Flash 6
times / / E6 E6

by johnson controls
20
Troubleshooting
17
Mode conict Mode conict
Shown
as Table
16
Flash 7
times / / E7 E7
Overload
protection
Overload
protection E8 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Anti cold blow
protection /
E9
/ / / / /
/Indoor unit water
overow error /Flash Flash E9 E9
Trial run/trial
operation
Trial run/trial
operation dd Quick
ash
Quick
ash
Quick
ash dd dd
Refrigerant
recovery mode
Refrigerant
recovery mode Fo Quick
ash
Quick
ash /Fo Fo
Drive module
resetting(for the
commercial unit)
IPM Drive
module resetting P0 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Min. cooling/
heating
(capability
test code)
Cooling
IPLV test P0
/Quick
ash /P0
P0
Cooling
IPLV test / / Quick
ash P0
Mid. Cooling/
heating
(capability
test code)
Cooling level AA
performance test P3
/Quick
ash /P3
P3
Level AA cooling
performance test / / Quick
ash P3
Phase over-
current
protection
Compressor
over-current
protection
P5 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Drive board
communication
error(for the
commercial unit)
Communication
error between
the inverter
driver to the
main controller
P6 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Short/open
circuit of the
of the module
temperature
sensor
Short/open
circuit of the
of the module
temperature
sensor
P7 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Module
temperature
protection
Module
temperature
protection
P8 Flash 3
times
Flash 3
times
Flash 3
times oE oE
AC contact
protection (for
the commercial
unit)
AC contact
protection P9 Flash 3
times
Flash 3
times
Flash 3
times oE oE
Circuit sensor
error
Circuit sensor
error Pc Flash 3
times
Flash 3
times
Flash 3
times oE oE
Transducer
connection
protection (for
the commercial
unit)
Transducer
connection
protection
Pd Flash 3
times
Flash 3
times
Flash 3
times oE oE
AC current
protection(input
side)
AC current
protection(input
side)
PA Flash 3
times
Flash 3
times
Flash 3
times oE oE
Temperature
drift protection
(for the
commercial unit)
Temperature
drift protection PE Flash 3 times
Flash 3
times
Flash 3
times oE oE