Mitsubishi Electric PKA-M60KAL User manual

SERVICE MANUAL
Notes:
• This manual describes only
service data of the indoor units.
•RoHS compliant products
have <G> mark on the spec
name plate.
CONTENTS
1. REFERENCE MANUAL .................................. 2
2. SAFETY PRECAUTION .................................. 3
3. PARTS NAMES AND FUNCTIONS ................ 8
4. SPECIFICATIONS ......................................... 10
5. NOISE CRITERION CURVES........................11
6. OUTLINES AND DIMENSIONS..................... 12
7. WIRING DIAGRAM........................................ 13
8. REFRIGERANT SYSTEM DIAGRAM........... 15
9. TROUBLESHOOTING................................... 16
10. FUNCTION SETTING.................................... 32
11. SPECIAL FUNCTION .................................... 33
12. DISASSEMBLY PROCEDURE...................... 36
Indoor unit
[Model Name] [Service Ref.]
PARTS CATALOG (OCB661)
INDOOR UNIT
PKA-M60KA.TH
PKA-M71KA.TH
PKA-M100KA.TH
PKA-M60KAL.TH
PKA-M71KAL.TH
PKA-M100KAL.TH
PKA-M60KA
PKA-M71KA
PKA-M100KA
PKA-M60KAL
PKA-M71KAL
PKA-M100KAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
No. OCH661
March 2017
R32/R410A

32
1REFERENCE MANUAL
OUTDOOR UNIT’S SERVICE MANUAL
Model Name Service Ref. Service Manual No.
PUHZ-ZRP60/71VHA2 PUHZ-ZRP60/71VHA2 OCH635/OCB635
PUZ-ZM60/71VHA PUZ-ZM60/71VHA OCH653/OCB653
PUZ-ZM100/125/140VKA
PUZ-ZM100/125/140YKA PUZ-ZM100/125/140VKA.UK PUZ-ZM100/125/140YKA.UK OCH654/OCB654
PUHZ-ZRP100/125/140VKA3
PUHZ-ZRP100/125/140YKA3
PUHZ-ZRP200/250YKA2
PUHZ-ZRP100/125/140VKA3.UK
PUHZ-ZRP100/125/140YKA3R1.UK
PUHZ-ZRP200/250YKA2.UK OCH645/OCB645
PUHZ-P100VHA5
PUHZ-P125/140VHA4
PUHZ-P100YHA3
PUHZ-P125/140YHA2
PUHZ-P100VHA5.UK
PUHZ-P125/140VHA4.UK
PUHZ-P100YHA3.UK
PUHZ-P125/140YHA2.UK
OCH646/OCB646
PUHZ-P200/250YKA2 PUHZ-P200/250YKA2.UK OCH647/OCB647
PUHZ-SHW112VHA
PUHZ-SHW112YHA PUHZ-SHW112VHAR4.UK PUHZ-SHW112YHAR4.UK OCH526/OCB526
PUHZ-FRP71VHA PUHZ-FRP71VHA OCH544/OCB544
OCH661

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SAFETY PRECAUTION
2
Cautions for units utilizing refrigerant R32/R410A
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
Use new refrigerant pipes.
Store the piping indoors, and keep both ends of
the piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
In case of using the existing pipes for R22, be careful with
the following.
· Be sure to clean the pipes and make sure that the insides
of the pipes are clean.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
· In case of reconnecting the refrigerant pipes after
detaching, make the flared part of pipe re-fabricated.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil, etc.
Use the following tools specifically designed for
use with R32/R410A refrigerant.
The following tools are necessary to use R32/R410A refrigerant.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R32/R410A
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil, etc.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil, etc.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified on name plate of outdoor
unit.
If other refrigerant (R22, etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil, etc.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Use the specified refrigerant only.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
OCH661

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[1] Warning for service
(1) Do not alter the unit.
(2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe
components specifically made for use with refrigerant specified in the outdoor unit installation manual.
(3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
(4) This unit should be installed in rooms which exceed the floor space specified in outdoor unit installation manual.
Refer to outdoor unit installation manual.
(5) For appliances not accessible to the general public.
(6) Refrigerant pipes connection shall be accessible for maintenance purposes.
(7) If the air conditioner is installed in a small room or closed room, measures must be taken to prevent the refrig-
erant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Should the
refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room may
result.
(8) Keep gas-burning appliances, electric heaters, and other fire sources (ignition sources) away from the location
where installation, repair, and other air conditioner work will be performed.
If refrigerant comes into contact with a flame, poisonous gases will be released.
(9) When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on out-
door unit to charge the refrigerant lines.
Do not mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and
may result in an explosion and other hazards.
(10) After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes
into contact with the flame of a heater or portable cooking range, poisonous gases will be released.
(11) Do not use low temperature solder alloy in case of brazing the refrigerant pipes.
(12) When performing brazing work, be sure to ventilate the room sufficiently. Make sure that there are no hazardous
or flammable materials nearby.
When performing the work in a closed room, small room, or similar location, make sure that there are no refriger-
ant leaks before performing the work.
If refrigerant leaks and accumulates, it may ignite or poisonous gases may be released.
(13) Do not install the unit in places where refrigerant may build-up or places with poor ventilation such as a semi-
basement or a sunken place in outdoor: Refrigerant is heavier than air, and inclined to fall away from the leak
source.
(14) Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manu-
facturer.
(15) The appliance shall be stored in a room without continuously operating ignition sources (for example: open
flames, an operating gas appliance or an operating electric heater).
(16) Do not pierce or burn.
(17) Be aware that refrigerants may not contain an odour.
(18) Pipe-work shall be protected from physical damage.
(19) The installation of pipe-work shall be kept to a minimum.
(20) Compliance with national gas regulations shall be observed.
(21) Keep any required ventilation openings clear of obstruction.
(22) Servicing shall be performed only as recommended by the manufacturer.
(23) The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as
specified for operation.
(24) Maintenance, service and repair operations shall be performed by authorized technician with required qualifica-
tion.
[2] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[3] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R32/R410A available on the market is a syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
OCH661

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[4] Cautions for unit using R32 refrigerant
Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful
attention to the following points.
(1) Information on servicing
(1-1) Checks on the Area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the
risk of ignition is minimized.
For repair to the refrigerating systems, (1-3) to (1-7) shall be completed prior to conducting work on the systems.
(1-2) Work Procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor being
present while the work is being performed.
(1-3) General Work Area
All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out.
Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the con-
ditions within the area have been made safe by control of flammable material.
(1-4) Checking for Presence of Refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is
aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable
for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
(1-5) Presence of Fire Extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing
equipment shall be available to hand.
Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
(1-6) No Ignition Sources
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work shall use any
sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, includ-
ing cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal,
during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around
the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs
shall be displayed.
(1-7) Ventilated Area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any
hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should
safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
(1-8) Checks on the Refrigeration Equipment
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all
times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer’s
technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants:
• The charge size is in accordance with the room size within which the refrigerant containing parts are installed.
• The ventilation machinery and outlets are operating adequately and are not obstructed.
• Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.
• Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance
which may corrode refrigerant containing components, unless the components are constructed of materials which are
inherently resistant to being corroded or are suitably protected against being corroded.
(1-9) Checks on Electrical Devices
Repair and maintenance to electrical components shall include initial safety checks and component inspection proce-
dures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is
satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an ade-
quate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include that:
• capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
• no live electrical components and wiring are exposed while charging, recovering or purging the system;
• there is continuity of earth bonding
(2) Repairs to Sealed Components
(2-1) During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked
upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment
during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn
of a potentially hazardous situation.
(2-2) Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not
altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of
connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
Ensure that the apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of prevent-
ing the ingress of flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specifications.
OCH661

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(3) Repair to intrinsically Safe Components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the
permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos-
phere. The test apparatus shall be at the correct rating.
Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in
the atmosphere from a leak.
(4) Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse
environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such
as compressors or fans.
(5) Detection of Flammable Refrigerants
Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.
A halide torch (or any other detector using a naked flame) shall not be used.
(6) Leak Detection Methods
Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants, the sensitivity
may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equip-
ment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the
appropriate percentage of gas (25% maximum) is confirmed.
Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be
avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or
isolated (by means of shut off valves) in a part of the system remote from the leak. For appliances containing flammable
refrigerants, oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing pro-
cess.
(7) Removal and Evacuation
When breaking into the refrigerant circuit to make repairs – or for any other purpose conventional procedures shall be
used. However, for flammable refrigerants it is important that best practice is followed since flammability is a considera-
tion. The following procedure shall be adhered to:
•removerefrigerant
•purgethecircuitwithinertgas
•evacuate
•purgeagainwithinertgas
•openthecircuitbycuttingorbrazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. For appliances containing flammable refrig-
erants, the system shall be “flushed” with OFN to render the unit safe. This process may need to be repeated several
times.
Compressed air or oxygen shall not be used for purging refrigerant systems.
For appliances containing flammable refrigerants, flushing shall be achieved by breaking the vacuum in the system with
OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to
a vacuum. This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used,
the system shall be vented down to atmospheric pressure to enable work to take place. This operation is absolutely vital
if brazing operations on the pipe-work are to take place.
Ensure that the outlet for the vacuum pump is not close to any ignition sources and that ventilation is available.
(8) Charging Procedures
In addition to conventional charging procedures, the following requirements shall be followed:
• Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines
shall be as short as possible to minimize the amount of refrigerant contained in them.
• Cylinders shall be kept upright.
• Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
• Label the system when charging is complete (if not already).
• Extreme care shall be taken not to overfill the refrigeration system.
Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. The system shall be leak-
tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the
site.
(9) Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its
detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an
oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential
that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
Continued to the next page
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b) Isolate system electrically.
c) Before attempting the procedure, ensure that:
•mechanicalhandlingequipmentisavailable,ifrequired,forhandlingrefrigerantcylinders;
•allpersonalprotectiveequipmentisavailableandbeingusedcorrectly;
•therecoveryprocessissupervisedatalltimesbyacompetentperson;
•recoveryequipmentandcylindersconformtotheappropriatestandards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer’s instructions.
h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equip-
ment are removed from site promptly and all isolation valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
(10) Labelling
Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be
dated and signed. For appliances containing flammable refrigerants, ensure that there are labels on the equipment stat-
ing the equipment contains flammable refrigerant.
(11) Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice
that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrig-
erant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge
are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e.
special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and associated
shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery
occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at
hand and shall be suitable for the recovery of all appropriate refrigerants including, when applicable, flammable refriger-
ants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be com-
plete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in
satisfactory working order, has been properly maintained and that any associated electrical components are sealed to
prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant
waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders. If compressors or
compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that
flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning
the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this pro-
cess. When oil is drained from a system, it shall be carried out safely.
OCH661

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[5] Service tools
Use the below service tools as exclusive tools for R32/R410A refrigerant.
Refer to the spec name plate on outdoor unit for the type of refrigerant being used.
3PARTS NAMES AND FUNCTIONS
Emergency operation
switch
Front grille
Air inlet
Filter
Air outlet
Louver
Vane
3-1. Indoor unit
No. Tool name Specications
1. Gauge manifold · Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
2. Charge hose · Use pressure performance of 5.09MPa·G or over.
3. Electronic weighing scale ―
4. Gas leak detector · Use the detector for R134a, R407, R410A, or R32.
5. Adaptor for reverse flow check · Attach on vacuum pump.
6. Refrigerant charge base ―
7. Refrigerant cylinder · R32 or R410A refrigerant
· Cylinder with syphon
8. Refrigerant recovery equipment ―
Electronic weighing scale
Unit
OCH661

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ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL SELECT
NOTAVAILABLE
CHECK TEST RUN
°C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
MODE SELECT button
Used to switch the operation mode between
cooling, drying, heating, auto and fan mode.
CHECK-TEST RUN buttons
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
FAN SPEED SELECT button
Used to change the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
buttons
SET TEMPERATURE button sets any desired
room temperature.
CLOCK display
Displays the current time.
“ ” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
Buttons used to set the “hour and minute” of
the current time and timer settings.
“h” and “min” buttons
display
display
FAN SPEED display indicates which fan
speed has been selected.
display
The vertical direction of air flow is indicated.
display
Blinks when model is selected.
display
display
CHECK and TEST RUN display indicate that
the unit is being checked or test-run.
display
OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.
AUTO STOP (OFF timer): when this switch
is set, the air conditioner will be
automatically stopped at the preset time.
AUTO START (ON timer): when this switch is
set, the air conditioner will be automatically
started at the preset time.
MODEL SELECT
CHECK TEST RUN
LOUVER button
Changes left/right airflow direction.
(Not available for this model.)
SET TEMP. display indicates the desired
temperature which is set.
Lights up while the signal is transmitted to
the indoor unit when the button is pressed.
TIMER CONTROL buttons
3-2. Wireless remote controller
OCH661

10 11
SPECIFICATIONS
4
Cooling
0.06
0.43
Heating
0.05
0.36
Single phase, 50Hz, 230V
Munsell 1.0Y 9.2/0.2
Plate fin coil
Line flow fan (direct) o1
0.056
18-20-22 (635-705-780)
0 (direct blow)
–
Wireless remote controller & built-in
39-42-45
16 (5/8)
1,170 (46-1/16)
295 (11-5/8)
365 (14-3/8)
21 (46)
kW
A
kW
K/min (CFM)
Pa (mmAq)
kW
dB
mm (inch)
mm (inch)
mm (inch)
mm (inch)
kg (lb)
Mode
Power supply (phase, cycle, voltage)
Input
Running current
External finish (Panel)
Heat exchanger
Fan Fan (drive) oNo.
Fan motor output
Airflow (Low-Middle-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-Middle-High)
Field drain pipe I.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Service Ref. PKA-M71KA.TH
PKA-M71KAL.TH
Cooling
0.06
0.43
Heating
0.05
0.36
Single phase, 50Hz, 230V
Munsell 1.0Y 9.2/0.2
Plate fin coil
Line flow fan (direct) o1
0.056
18-20-22 (635-705-780)
0 (direct blow)
–
Wireless remote controller & built-in
39-42-45
16 (5/8)
1,170 (46-1/16)
295 (11-5/8)
365 (14-3/8)
21 (46)
kW
A
kW
K/min (CFM)
Pa (mmAq)
kW
dB
mm (inch)
mm (inch)
mm (inch)
mm (inch)
kg (lb)
Mode
Power supply (phase, cycle, voltage)
Input
Running current
External finish (Panel)
Heat exchanger
Fan Fan (drive) oNo.
Fan motor output
Airflow (Low-Middle-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-Middle-High)
Field drain pipe I.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
PKA-M60KA.TH
PKA-M60KAL.TH
Service Ref.
Cooling
0.08
0.57
Heating
0.07
0.50
Single phase, 50Hz, 230V
Munsell 1.0Y 9.2/0.2
Plate fin coil
Line flow fan (direct) o1
0.056
20-23-26 (705-810-920)
0 (direct blow)
–
Wireless remote controller & built-in
41-45-49
16 (5/8)
kW
A
kW
K/min (CFM)
Pa (mmAq)
kW
dB
mm (inch)
mm (inch)
mm (inch)
mm (inch)
kg (lb)
W
D
H
INDOOR UNIT
PKA-M100KA.TH
PKA-M100KAL.TH
Mode
Power supply (phase, cycle, voltage)
Input
Running current
External finish (Panel)
Heat exchanger
Fan Fan (drive) oNo.
Fan motor output
Airflow (Low-Middle-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-Middle-High)
Field drain pipe I.D.
Dimensions
Weight
1,170 (46-1/16)
295 (11-5/8)
365 (14-3/8)
21(46)
Service Ref.
OCH661

11
5NOISE CRITERION CURVES
Note: Measured in anechoic room.
PKA-M100KA(L)
41 - 45 - 49
PKA-M60/71KA(L)
Models
39 - 42 - 45
Sound level dB (A)
Sound level at anechoic room : Low-Middle-High
1.0 m
1.0 m
Measurement location
5-1. SOUND LEVELS
5-2. NOISE CRITERION CURVES
External static pressure : 0Pa
Power source :
220, 230, 240V, 50Hz
External static pressure : 0Pa
Power source :
220, 230, 240V, 50Hz
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
Octave band pressure level (dB) 0dB=20μPa
Approximate minimum
audible limit on
continuous noise
NC-40
Octave band center frequencies (Hz)
NC-20
NC-30
High
Low
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
Octave band pressure level (dB) 0dB=20μPa
NC-40
Octave band center frequencies (Hz)
NC-20
NC-30
High
Low
PKA-M60KA.TH
PKA-M60KAL.TH
PKA-M71KA.TH
PKA-M71KAL.TH
PKA-M100KA.TH
PKA-M100KAL.TH
Approximate minimum
audible limit on
continuous noise
OCH661

12 13
Refrigerant pipe : 9.52
Flared connection : 3/8F
16 O.D
Liquid pipe
Gas pipe
Drain hose
Sleeve
(purchased locally)
75 75~ 80
Through hole
53
32
18
30
66
35
65.2
423.7
1170
123
154
BB
134
431.7
11 140.3
365
A
5
C
295
75-Φ5.1
Tapping screw hole
4-Φ9 Bolt hole
Center measurement hole Φ2.5
0
314 364 384 408.5 439 454 517.4
585 439 384 339 189
0
216.5
R37.5
339 384 585 439
349.2 449.2
430.5
530.5
110 110 314
54
15.5 0
50
75
117
125
142
292
279.5
242
192
25
100
32
25
37.5
62.5
104.5
129.5
167
217
264
292
308.5
311
0
12.5
12.5
87.5
229.5
364 384.5 408.5 439 454 465.5 60 60 0 10 10
54
3
C
65
67
65
67
77
77
7.8
7.8
10.7
87
77 65
B A
Top side
Front side
Front side (Grille open)
Terminal block for outdoor unit
Terminal block for power supply (option)
Terminal block for
MA-remote controller (option)
Emergency operation switch
(cooling/heating)
Operation lamp
DEFROST/STAND BY lamp
Receiver
Knockout hole for
right piping
Mount board
Right side
444 (Gas pipe)
482 (Liquid pipe)
585 (Drain hose)
Filter hook
Under side
Vane (auto)
Knockout hole
for lower piping
Louver (manual)
Piping connection department
Indoor unit outline
Wall hole for
right rear piping
Knockout hole for
left rear piping
(75×480)
Wall hole for
left rear piping
Mount board
Temporarily fixing hole
108 mm or greater with left or
rear left piping or
drain pump installation
Min. 48
Min. 250
Air outlet
Air inlet
Min. 100.5
Min. 220Min. 52.3
550 mm or greater with optional
drain pump installation
265 mm or greater with optional drain pump installation
Min. 7
Required space (Indoor unit)
Knockout hole for piping
Knockout hole
for left piping
Left side
Refrigerant pipe : 15.88
Flared connection : 5/8F
74 (855) 241
OUTLINES AND DIMENSIONS
6
PKA-M60KA.TH PKA-M70KA.TH PKA-M100KA.TH
PKA-M60KAL.TH PKA-M70KAL.TH PKA-M100KAL.TH
Unit: mm
OCH661

13
WIRING DIAGRAM
7
PKA-M60KA.TH PKA-M70KA.TH PKA-M100KA.TH
SYMBOL SYMBOLNAME NAME
I.B
INDOOR CONTROLLER BOARD
FUSE (T3.15AL250V)
CONNECTOR (LOSSNAY)
CONNECTOR (REMOTE SWITCH)
CONNECTOR (HATERMINAL-A)
CONNECTOR (CENTRALLY CONTROL)
POWER SUPPLY (I.B)
POWER SUPPLY (R.B)
TRANSMISSION (INDOOR-OUTDOOR)
RELAY (DRAIN PUMP (OPTION))
SWITCH (MODEL SELECTION) * Refer to <table 1>
SWITCH (CAPACITY CODE) * Refer to <table 2>
CONNECTOR (EMERGENCY OPERATION)
VANE MOTOR
FAN MOTOR
REACTOR
TERMINAL BLOCK (INDOOR UNIT POWER (OPTION))
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
ROOM TEMP. THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
PIPE TEMP. THERMISTOR/LIQUID
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
COND./EVA. TEMP. THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
M
FUSE
MS
DCL
CN2L
CN32
CN41
CN51
TB2
LED1
TB5
LED2
TH1
LED3
X1
TH2
SW1
TH5
SW2
SWE
[LEGEND]
S.W
SWITCH BOARD
CONNECTOR
CN105
CONNECTOR (REMOTE OPERATION ADAPTER)
CN90
DRAIN FLOAT SWITCH (DRAIN PUMP (OPTION))
CN4F
DRAIN PUMP (OPTION) POWER SUPPLY
(DRAIN PUMP (OPTION))
CNP
TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)
TB4
R.B WIRED REMOTE CONTROLLER (OPTION)
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
TB6
REC1 RECEIVING UNIT
SWE2 EMERGENCY OPERATION
W.B
PCB FOR WIRELESS REMOTE CONTROLLER
LED1 LED (OPERATION INDICATION : GREEN)
DP DRAIN PUMP (OPTION)
FS DRAIN FLOAT SWITCH (OPTION)
LED2
LED (PREPARATION FOR HEATING : ORANGE)
+ -
CN22
(BU)
CNRU
(WH)
1
2
1
6
1
6
3
1
3
1
M
M
1~
I.B
MS
3~
DCL
CN51
(WH)
CN41
(WH)
CN2L
(RD)
Refer to
tables
1 and 2
LED3
LED1
LED2
SWE
ONOFF
X1
CN90
(WH) CN32 (WH)
CN3C
(BU)
LDSWE(A)
(BU)
CNP(BU)
CN301
(GN) LED2
LED1
REC1
RU
LDSWE(B) SWE2
SW
tºtº tº
CN44
(WH)
CN151
(WH) CN20 (RD) CN4F (WH)
11 15 2 4 1 4
FUSE
CN01
(BK)
CNMF
(WH)
1 6
TH1 TH2 TH5
DP
5
3
1
BK
W.B
OG
OG
BN
OG
YE YE YE
S3
S2
S1
DB1
54 1121
1 9 1 3
TB4 TO
OUTDOOR
UNIT
2
When attaching drain
pump (option)
1 4
FS
FLOAT SW
CN4F
(WH)
2
12 1
BU
BU
TB5 TB6
R.B
Notes:
1. Symbols used in wiring diagram above are,
:Connector, :Terminal (block).
2. Indoor and outdoor connecting wires have
polarities, make sure to match terminal
numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor side electric wiring may
change, be sure to check the outdoor unit
electric wiring diagram for servicing.
4. This diagram shows the wiring of indoor and
outdoor connecting wires. (specification of
230V), adopting superimposed system of
power and signal.
*1 : When work to supply power separately
to indoor and outdoor units was applied,
refer to Fig 1.
*2 : For power supply system of this unit,
refer to the caution label located near
this diagram.
*1 (Fig. 1)
ON
OFF
1 2 3 4 5
SETTING
ON
OFF
12345
SETTINGCAPACITY
60
ON
OFF
12345
SETTINGCAPACITY
71
ON
OFF
1 2 3 4 5
SETTINGCAPACITY
100
<Table 1>
SW1
(MODEL SELECTION) <Table 2>
SW2 (CAPACITY CODE)
CN01
(BK) I.B
YE
OG RD BU
GNYE
TB2
L
N
YE
OG
OG
BN
TB4
S1
S2
S3
1
3
1
3
5
CN3C
(BU)
TO OUTDOOR
UNIT
POWER SUPPLY
~(1PHASE)
230V 50Hz
CN105
(RD) 51
The black square ( ) indicates a switch position.
When attaching
drain pump (option).
remove the jumper
connector (CN4F)
and fit the drain
float switch (FS).
OCH661

1514
PKA-M60KAL.TH PKA-M70KAL.TH PKA-M100KAL.TH
CN22
(BU)
CNRU
(WH)
1
2
1
6
1
6
3
1
3
1
M
M
1~
I.B
MS
3~
DCL
CN51
(WH)
CN41
(WH)
CN2L
(RD)
Refer to
tables
1 and 2
LED3
LED1
LED2
SWE
ONOFF
X1
CN90
(WH) CN32 (WH)
CN3C
(BU)
LDSWE(A)
(BU)
CNP(BU)
CN301
(GN) LED2
LED1
REC1
RU
LDSWE(B) SWE2
SW
tºtº tº
CN44
(WH)
CN151
(WH) CN20 (RD) CN4F (WH)
11 15 2 4 1 4
FUSE
CN01
(BK)
CNMF
(WH)
1 6
TH1 TH2 TH5
DP
5
3
1
BK
W.B
OG
OG
BN
OG
YE YE YE
S3
S2
S1
DB1
54 1121
1 9 1 3
TB4 TO
OUTDOOR
UNIT
2
When attaching
drain pump (option).
remove the jumper
connector (CN4F)
and fit the drain
float switch (FS).
When attaching drain
pump (option)
1 4
FS
FLOAT SW
CN4F
(WH)
2
12 1
BU
BU
TB5 TB6
R.B
Notes:
1. Symbols used in wiring diagram above are,
:Connector, :Terminal (block).
2. Indoor and outdoor connecting wires have
polarities, make sure to match terminal
numbers (S1, S2, S3) for correct wirings.
3. Since the outdoor side electric wiring may
change, be sure to check the outdoor unit
electric wiring diagram for servicing.
4. This diagram shows the wiring of indoor and
outdoor connecting wires. (specification of
230V), adopting superimposed system of
power and signal.
*1 : When work to supply power separately
to indoor and outdoor units was applied,
refer to Fig 1.
*2 : For power supply system of this unit,
refer to the caution label located near
this diagram.
*1 (Fig. 1)
ON
OFF
1 2 3 4 5
SETTING
ON
OFF
12345
SETTINGCAPACITY
60
ON
OFF
1 2 3 4 5
SETTINGCAPACITY
71
ON
OFF
1 2 3 4 5
SETTINGCAPACITY
100
<Table 1>
SW1
(MODEL SELECTION) <Table 2>
SW2 (CAPACITY CODE)
CN01
(BK) I.B
YE
OG RD BU
GNYE
TB2
L
N
YE
OG
OG
BN
TB4
S1
S2
S3
1
3
5
TO OUTDOOR
UNIT
POWER SUPPLY
~(1PHASE)
230V 50Hz
CN105
(RD) 51
+ -
The black square ( ) indicates a switch position.
1
3
CN3C
(BU)
SYMBOL SYMBOLNAME NAME
I.B
INDOOR CONTROLLER BOARD
FUSE (T3.15AL250V)
CONNECTOR (LOSSNAY)
CONNECTOR (REMOTE SWITCH)
CONNECTOR (HATERMINAL-A)
CONNECTOR (CENTRALLY CONTROL)
POWER SUPPLY (I.B)
POWER SUPPLY (R.B)
TRANSMISSION (INDOOR-OUTDOOR)
RELAY (DRAIN PUMP (OPTION))
SWITCH (MODEL SELECTION) * Refer to <table 1>
SWITCH (CAPACITY CODE) * Refer to <table 2>
CONNECTOR (EMERGENCY OPERATION)
VANE MOTOR
FAN MOTOR
REACTOR
TERMINAL BLOCK (INDOOR UNIT POWER (OPTION))
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE (OPTION))
ROOM TEMP. THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
PIPE TEMP. THERMISTOR/LIQUID
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
COND./EVA. TEMP. THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
M
FUSE
MS
DCL
CN2L
CN32
CN41
CN51
TB2
LED1
TB5
LED2
TH1
LED3
X1
TH2
SW1
TH5
SW2
SWE
[LEGEND]
S.W
SWITCH BOARD
CONNECTOR
CN105
CONNECTOR (REMOTE OPERATION ADAPTER)
CN90
DRAIN FLOAT SWITCH (DRAIN PUMP (OPTION))
CN4F
DRAIN PUMP (OPTION) POWER SUPPLY
(DRAIN PUMP (OPTION))
CNP
TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)
TB4
R.B WIRED REMOTE CONTROLLER (OPTION)
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
TB6
REC1 RECEIVING UNIT
SWE2 EMERGENCY OPERATION
W.B
PCB FOR WIRELESS REMOTE CONTROLLER
LED1 LED (OPERATION INDICATION : GREEN)
DP DRAIN PUMP (OPTION)
FS DRAIN FLOAT SWITCH (OPTION)
LED2
LED (PREPARATION FOR HEATING : ORANGE)
OCH661

15
Thermistor TH2
(Pipe temperature/liquid)
Distributor
with strainer (#50/#100)
Thermistor TH5
(Cond./Eva. temperature)
Thermistor TH1
(Room temperature)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer (#50)
Strainer (#50)
Heat exchanger Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)
REFRIGERANT SYSTEM DIAGRAM
8
PKA-M60KA.TH PKA-M70KA.TH PKA-M100KA.TH
PKA-M60KAL.TH PKA-M70KAL.TH PKA-M100KAL.TH
OCH661

16 17
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Present and past check codes are logged, and they can be displayed on the wired remote controller or controller board of out-
door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa-
rized in the table below. Check the contents below before investigating details.
9-1. TROUBLESHOOTING
Unit conditions at service Check code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action according
to “9-3. SELF-DIAGNOIS ACTION TABLE”.
Conduct troubleshooting and ascertain the cause of the
trouble according to “9-4. TROUBLESHOOTING BY
INFERIOR PHENOMENA”.
The trouble is not reoccurring.
Logged
Not logged
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise, etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring, etc.
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical component,
controller board, remote controller, etc.
1Re-check the abnormal symptom.
2Conduct troubleshooting and ascertain the cause of the
trouble
according to “9-4. TROUBLESHOOTING BY
INFERIOR PHENOMENA”.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote
controller, etc.
TROUBLESHOOTING
9
OCH661

1717
•"CHECK"lights,andrefrigerantaddress
"00"flashes.
•Checkthattheremotecontroller'sdis-
play has stopped before continuing.
•Selecttherefrigerantaddressofthe
indoor unit for the self-diagnosis.
Note: Set refrigerant address using the
outdoor unit’s DIP switch (SW1).
(For more information, see the out-
door unit installation manual.)
•Ifanairconditionererroroccurs,the
indoorunit'ssensoremitsanintermittent
buzzer sound, the operation light flashes,
and the check code is output.
(It takes 3 seconds at most for check
code to appear.)
•Thecheckmodeiscancelled.
[Procedure]
1. Press the CHECK button twice.
2. Press the TEMP buttons.
3. Point the remote controller at the
sensor on the indoor unit and
press the HOUR button.
4. Point the remote controller at the
sensor on the indoor unit and
press the ON/OFF button.
<Malfunction-diagnosis method at maintenance service>
9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER
<In case of trouble during operation>
When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.
ON/OFF TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET CLOCK
CHECK
CHECK
display
Temperature
button
CHECK
button
Refrigerant
address
display
HOUR
button
ON/OFF
button
OCH661

18
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
Notes: If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and
the OPERATION INDICATOR lamp does not come on, there are no error records.
2.
1.
If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 seconds)” after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 s On Approx. 3 s On 0.5 s On 0.5 s On 0.5 s On 0.5 s Off Approx. 2.5 s On Approx. 3 s On 0.5 s On 0.5 s
···Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”) Number of flashes/beeps in pattern indicates the check code in the following table
nth
1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 s On 0.5 s On 0.5 s On 0.5 s On
0.5 s Off
Approx. 2.5 s On 0.5 s On 0.5 s
···Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”) Number of flashes/beeps in pattern indicates the check code in the following table
nth
1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
•Refer to the following tables for details on the check codes.
[Output pattern A]
14
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code Symptom Remark
(Number of times)
Wireless remote controller
Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code
(Number of times)
Wireless remote controller
Wired remote controller
1 P1 Intake sensor error
P9 Pipe (TH5) sensor error
2P2 Pipe (TH2) sensor error
3 E6,E7 Indoor/outdoor unit communication error
4 P4 Drain sensor error/Float switch connector (CN4F) open
5P5
PA Drain pump error
Forced compressor stop(due to water leakage abnormality)
6 P6 Freezing/Overheating protection operation
7 EE Combination error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5 Remote controller signal receiving error
Abnormal refrigerant circuit
10 –
11
PL
–
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Symptom Remark
1Indoor/outdoor unit communication error
2(Transmitting error) (Outdoor unit)
3Open/short of outdoor unit thermistors
4Compressor overcurrent interruption (When compressor locked)
5Abnormal high discharging temperature/49C operated/
insufficient refrigerant
6Abnormal high pressure (63H operated)/Overheating
protection operation
7Abnormal temperature of heat sink
8Outdoor unit fan protection stop
9Compressor overcurrent interruption/Abnormal of power module
10 Abnormality of super heat due to low discharge temperature
11 Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error
12
13
U2
U5
UP
U3,U4
UF
U1,Ud
U8
U6
U7
U9,UH
Others
–
–– –
14 Other errors (Refer to the technical manual for the outdoor unit.)
For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
outdoor unit's
service manual.
12 Fb Indoor unit control system error (memory error, etc.)
–E0, E3
– E1, E2 Remote controller control board error
Remote controller transmission error
Compressor overcurrent interruption
•On wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
•On wired remote controller
Check code displayed in the LCD.
Pb Indoor unit fan motor error
OCH661

19
•If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Symptom Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit)
On the wireless remote controller with condition above, following phenomena take place.
•No signals from the remote controller can be received.
•Operation lamp is blinking.
•The buzzer makes a short ping sound.
PLEASE WAIT
PLEASE WAIT →Check code
Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).
For about 2
minutes after
power-on
Subsequent to
about 2 minutes
after power-on
After LED 1, 2 are lighted, LED 2 is
turned off, then only LED 1 is lit.
Only LED 1 is lit.→LED 1, 2 blink.
Only LED 1 is lit.→
LED 1 blinks twice,
LED 2 blinks once.
•For about 2 minutes following power-on,op-
eration of the remote controller is not possible
due to system startup. (Correct operation)
•Connector for the outdoor unit’s protection
device is not connected.
•Reverse or open phase wiring for the outdoor
unit’s power terminal block (L1, L2, L3)
•Incorrect wiring between indoor and outdoor
units (incorrect polarity of S1, S2, S3)
•Remote controller wire short
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED1 (power for microprocessor) Indicates whether control power is supplied. Make sure that this LED is
always lit.
LED2 (power for remote controller) Indicates whether power is supplied to the remote controller.
This LED lights only in the case of the indoor unit which is connected to the
outdoor unit refrigerant addresses “0”.
LED3 (communication between indoor and
outdoor units) Indicates state of communication between the indoor and outdoor units. Make sure that this LED is always blinking.
(Correct operation)
OCH661

20
9-3. SELF-DIAGNOSIS ACTION TABLE
Note:
Errors to be detected in outdoor unit, such as codes starting with F, U or E
(excluding E0 to E7), are not covered in this document. Please refer to the out-
doorunit'sservicemanualforthedetails.
Check code
Abnormal point and detection method Cause Countermeasure
P1
P2
Room temperature thermistor (TH1)
1The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3
minutes. (The unit returns to normal
operation, if it has been reset normally.)
2Constantly detected during cooling,
drying, and heating operation.
 Short:−90:or more
 Open:−40:or less
1Defective thermistor
characteristics
2Contact failure of connector
(CN20) on the indoor controller
board (Insert failure)
3Breaking of wire or contact
failure of thermistor wiring
4Defective indoor controller
board
1–3Check resistance value of thermistor.
0:15.0 k"
10:9.6 k"
20:6.3 k"
30:4.3 k"
40:3.0 k"
If you put force on (draw or bend) the lead wire
with measuring resistance value of thermistor,
breaking of wire or contact failure can be
detected.
2Check contact failure of connector (CN20)
ontheindoorcontrollerboard.Referto"9-7.
TESTPOINTDIAGRAM". Turn the power on
again and check restart after inserting con-
nector again.
4Check room temperature display on remote
controller.
Replace indoor controller board if there
is abnormal difference with actual room
temperature.
Turn the power off, and on again to operate
after check.
Pipe temperature thermistor/Liquid (TH2)
1The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3
minutes. (The unit returns to normal
operation, if it has been reset normally.)
2Constantly detected during cooling,
drying, and heating (except defrosting)
operation
Short: 90:or more
 Open:−40:or less
1Defective thermistor
characteristics
2Contact failure of connector
(CN44) on the indoor controller
board (Insert failure)
3Breaking of wire or contact
failure of thermistor wiring
4Defective refrigerant circuit is
causing thermistor temperature
of 90:ormore,or−40:or
less.
5Defective indoor controller
board
1–3Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2Check contact failure of connector (CN44)
ontheindoorcontrollerboard.Referto"9-7
TESTPOINTDIAGRAM".
Turn the power on and check restart after
inserting connector again.
4Check pipe <liquid> temperature with remote
controller in test run mode. If pipe <liquid>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
5Check pipe <liquid> temperature with
remote controller in test run mode. If there is
extremely difference with actual pipe <liquid>
temperature, replace indoor controller board.
Turn the power off, and on again to operate
after check.
P4
Contact failure of drain float switch
(CN4F)
• Extractwhentheconnectorofdrainfloat
switch is disconnected.
(3and 4of connector CN4F is not
short-circuited.)
• Constantlydetectedduringoperation
1Contact failure of connector
(Insert failure)
2Defective indoor controller
board
1
Check contact failure of float switch connector.
Turn the power on again and check after
inserting connector again.
2Operate with connector (CN4F) short-
circuited.
Replace indoor controller board if abnormality
reappears.
P5
Drain over flow protection operation
1Suspensive abnormality, if drain float
switch is detected to be underwater for
1 minute and 30 seconds continuously
with drain pump on.
Compressor and indoor fan will be
turned off.
2Drain pump is abnormal if the condition
above is detected during suspensive
abnormality.
3Constantly detected during drain pump
operation
1Malfunction of drain pump
2Defective drain
Clogged drain pump
Clogged drain pipe
3Defective drain float switch
Catch of drain float switch or
malfunction of moving parts
cause drain float switch to be
detected under water (Switch
On)
4Defective indoor-controller
board
1Check if drain pump operates.
2Check drain function.
3Remove drain float switch connector CN4F
and check if it is short (Switch On) with the
moving part of float switch UP, or OPEN with
the moving part of float switch down.
Replace float switch if it is short with the
moving part of float switch down.
4Replace indoor controller board if it is short-
circuited between 3–4of the drain float
switch connector CN4F and abnormality
reappears.
It is not abnormal if there is no problem about
the above-mentioned 1–4.
Turn the power off, and on again to operate
after check.
OCH661