Onida OV-R224P/Na-M User manual

Multi Variable Air Conditioners
Ducted Type Indoor Unit Owner’s Manual
Models ：
OV-R224P/Na-M
OV-R280P/Na-M

Please read this manual carefully before operating
Thank you for choosing ONIDA Air Conditioner Units, please read this manual carefully
before using this unit and operates it correctly according to guideline in this manual, and
keeps it for reference.
User notices 1
Safety Precautions 3
The selection of installation place and notice of the air conditioner
unit 4
Install the ducted type indoor unit 6
Name and Function of Each Part of Ducked Type Indoor Unit 20
Working Temperature Range 21
The components of the wired remote control 22
On/Off operation 22
Timer setting 23
SLEEP mode setting 24
Fan Speed Control 24
Temp. adjusting 25
Set of running mode 25
Wired remote control operation procedure
Malfunction display 25
Names and functions of every button of the remote control 27
Names and functions of every button of the remote control
(Remove the cover) 28
Operation procedure 29
Remote controller
operation procedure
Howtoinsertbatteries 29
Trouble shooting 30
Care and maintenance 31
CONTENTS
Performance parameters list of the ducted type indoor unit 32

1
USER NOTICES
☆When the unit is operating, the total capacity of the indoor units should be no more than the
capacity of outdoor unit. Otherwise, it can cause the shortage of cooling capacity (heating
capacity) of each indoor unit.
☆The power supply of the indoor unit must be the unified power supply. The indoor unit cannot
have the individual power switch, and the entire indoor unit can only be controlled by one
main power control. Disconnect the main power of all the indoor units before cleaning.
☆In order to start the unit successfully, the general power supply switch of the air-conditioning
units should be turned to the “ON” position for 8 hours before running.
☆After each of indoor units received the stop running signal, the fan motor of the indoor unit
will use the surplus cool or surplus heat of the heat exchanger go on running for 20-70 seconds,
this is the preparation for the next time use and this is the normal phenomenon.
☆When the selected mode of the indoor unit co nflict with the mode of outdoor unit, after 5
seconds, the wired remote control will display the operation conflict, the indoor unit will stop
running, then to unify the running modes of the indoor unit and outdoor unit, the unit will get
right. There is no conflict in the COOL mode and DRY mode, the FAN mode will not conflict
with any other modes.
☆The appliance shall not be installed in the laundry
☆An all-pole disconnection switch having a contact separation of at least 3mm in all poles should
be connected in fixed wiring
☆Missing information regarding electric supply tolerances(+/-10%, +/-1Hz) in documentation
☆Missing information regarding humidity (30-95%) in documentation

2
☆Missing information regarding installation altitude (max 1000m) in documentation
☆Information regarding transp ort/storage temperature (-25-55 is missing
☆Main switch provided by end user: main swit ch handle should be black or gray, it can be
locked in “OFF” position with padlock
☆The main disconnection device should be expl ained in user manual and the height should be
recommended at 0.6-1.7m. over current protection is required(EN 60947-3, EN 60947-2)
☆The cooling range of the unit is the outdoor environment temp.18-43 DB,the heating range
of the unit( only for the heat pump type unit) is the outdoor environment temp. -16-15 WB.

3
Safety Precautions
1. Before using the appliance, read this manual thoroughly and operate under its direction.
2. “WARNING” and “ATTENTION” have the foll owing meanings in these instructions:
WARNNING! ：This mark indicates procedures, which if improperly performed, might lead to the death
or serious injury of the users.
ATTENTION! ：This mark indicates procedures, which if improperly performed, might possibly result in
personal injury to the user, or damage to property.
WARNNING ！
zWhen install the unit, please relegate to the special arrangement maintenance center. If improper performed, it can
cause the water leakage, electric shock and fire etc. accidents.
zPlease install the unit to a steady and stable place. If the intension is inadequate, the unit will drop off and will lead
to the personal injury and death.
zIn order to make sure the right water drainage, the installation of drainage pipe should be according to the
installation methods of this manual, and also adopt the heat retaining measure to prevent the water condensing. If
installed improperly, it will cause water leakage and might moisten the furniture.
zDo not use or store the combustible and detonatable materials near the air conditioner.
zWhen malfunction happed (there is the burning smell etc.), please power off the general power supply of the units.
zKeep the well ventilation in order to avoid the oxygen lack.
zDo not insert hands or other objects into the inlet or outlet grille.
zDue to the long time use, please check the mounting frame if broken or not.
zDo not refit the unit. When need to maintenance or remove the unit, please contact with the local dealer or the
professional.
ATTENTION！：
zEnsure the power supply correspond to the nameplate and check the security of the power source before installation.
zMake sure that the wires, pipes and drain hose are properly connected before operation to avoid a fire or electric
shock.
zThe general power supply must be reliably earthed! To ensure the units are earthed availably, to avoid the electric
shock. The earth wire can’t be connected to the gas pipe, water pipe, wires of the lightning rod and telephone.
zOnce the units start, need at least more than 5 minutes running then it could be turned off.
zDon’t let children operate the units.
zDo not operate the units with wet hands.
zWhen cleaning the air conditioner or changing filters, please turn off the general power supply of the units firstly.
zSwitch off power source when the units will not be operated for a long period.
zDo not expose the units to the water place or the damp place or the corrosion environment.
zAfter installation, when electrified the electric leakage should be tested.

4
The selection of installation place and notice of the air conditioner unit
●The selection of the installation place of the air conditioner unit
The installation must accord with the national and local safe criterion.
Since the quality of installation would affect the operation directly, user should contact the seller
and have the conditioner installed and tested by the professional install personnel according to
the install instruction instead of install by himself/herself.
Only connect the power after all the installation works are finished.
●The selection of the installation place of the indoor unit
☆Prevent direct sun burn.
☆Make sure that the top steeve, ceiling, and the structure of the construction etc. is strong enough to bear the weight of
the unit.
☆The drainage pipe is easy to drain.
☆The air flow is not blocked at the outlet and intake vents.
☆The connecting pipe indoor and outdoor can by lead to outside conveniently.
☆The unit cannot be installed in the place where stored the flammability, easy exploded thing or the place where would
have leakage of flammability and exploded gas.
☆The unit cannot be installed in the place where has the corrupt gas and serious dust, saline fog, lampblack and huge
humidity.
Note！
The air conditioner unit installed in the following place may have malfunction, if the malfunction cannot prevent,
please contact the Nominated Repair Center Of MIRC Electronics Ltd., Mumbai.
①the place with greasy all around; ②the seashore place with salinity and alkali; ③the place with vulcanized gas( such
as vulcanized hot spring); ④the place with high frequency equipment ( such as wireless equipment, electric welding
machine and medical treatment equipment);⑤the place with special environment.
●The electric cord disposal
☆The cord disposal should be installed according to the National Principal.
☆The power must use the rated voltage and the electric circuit specific for air conditioner unit.
☆Please don’t pull the power cord vigorously.
☆All the electric equipment should be installed by the professional personnel according to the local law, regulation and
this instruction.
☆The power cord diameter should be big enough, the destroyed power cord and connecting cord should be replaced by
the specific cord.

5
The selection of installation place and notice of the air conditioner unit
☆The earthing should reliably connected with the specific earthing equipment in the architecture, and this should be
done by the professional personnel. There must be creepage protection switch and air switch with enough capacity in
the rated circuit (reference the following form). The air switch should maintain the functions of magnetic de-buckle
and heat de-buckle to assure the protection when circuit-short and overload happen.
●Earthing requirement
☆The air conditioner is class I appliance, so please do take the reliable measurement to earthing.
☆The yellow and green cord in the air conditioner unit is earthing cord which cannot be used for other purpose, and cut
off, as well as fixed up with screw. Otherwise, it would lead electric shock.
☆The reliable earthing terminal must be offered by the user power. And please don’t connect the earthing cord to the
following place:
①Tap water pipe；②Coal gas pipe；③Ejection pipe；④The place that is consider to be not reliable by the
professional personnel.
●The attachment used for installation
Every attachment used for installation of the indoor and outdoor unit please refer to the packing list in every
individual package carton.

6
Install of the ducted type indoor unit
●Shape dimension diagram of indoor unit
1). The dimensions of installation hole and the intake/outlet port are shown in Fig. 1 and Table 1.
The following figure is applicable to the indoor units of OV-R224P/ Na-M
、
OV-R280P/ Na-M
a
d
c
b
f
e
Air Outlet
Fig. 1
Look into from air outlet vent, the wiring is in the right of the unit.
Ta b l e 1
Model a b c d e f
OV-R224P/ Na-M
OV-R280P/ Na-M 1560 910 1194 1194 292 342

7
Install of ducted type indoor unit
●Schematic diagram of installation spaces
2).Main body of the indoor unit The indoor unit should be installed horizontally and the demand of installation
space is shown in Fig. 2. To install an indoor unit needs 4 hanging rods, and each hanging rod should at
least withstand four times of the unit’s weight.
Air supply
Air return
Suspender
Hook
Flat
washer
Spring
washer
Nut
installation of suspender
>1000
>1,000 >560
Fig.2
3). Drain hose
For easy drainage of the condensation water, the should be installed with a downward gradient. To avoid the
condensation, the connection pipe joint should be insulated with thermal insulation material. A water seal
should be employed as shown in Fig. 3 and the height of the water seal could be determined by the pressure
of the drain hose.
Drain hose is in negative pressure state: A = B≥P/10+20 (mm)
Drain hose is in positive pressure state: A≥30mm，≥B P/10+20 (mm)
Note: P is the absolute pressure of the drain hose position, Pa
A
B
Fig.3
4). Refrigerant pipe insulation layer
To avoid condensation of drew and water leakage, gas pipe and liquid pipe of refrigerant should be insulated with
thermal insulation material and adhesive tape.

8
Install of ducted type indoor unit
5). Install the Electrical Box.
In order to ease the maintaining work, we recommend to get of the electrical box part of the indoor unit to refix
it at the air outlet part. Please see following Fig 4.
Fig. 4 Schematic for the Electrical Box part
6). Adjust the tightness of the belt of the fan unit
The rotation of the fan is achieved by the transmission of the belt. The velocity and stability of the fan is associated with
the tightness of the belt and the tightness should be adjusted after a period of time. For a new belt, the tightness should be
adjusted for at least twice within 24 hours. After one week running, the tightness of the belt should be adjusted again, we
should routinely check it every 1-2 months; also ensure the test results complying with Table 2. The adjustment of the
tightness of the belt is shown in Fig. 5. Loosen screws fixing motor on the base, move motor along the direction of arrow
as shown in the picture, then fix the screw again.
The tightness level of belt is tested by tensiometer as shown in Fig. 6, when △reaches the deviation
length(Deviation=The total length beit/64) ,read the value on the meter, the value should be in the category
specified in Table 2.
Table.2 Tension range of the belt
Tension (N)
Section area of the belt Diameter of the small belt (mm) Min Max
SPA Φ80 7.5 10.9
Φ80 7.2 8.3
Φ71 5.8 6.6
SPZ
Φ67 7.8 9.0

9
Install of ducted type indoor unit
Fig. 5 Adjust the tightness of the belt Fig. 6 Utilization of the belt tensiometer
Mounting plate for motor
Nut 1
Setting lever
Nut 2
Belt tensiometer

10
Install of ducted type indoor unit
Attention:
●There should be thermal insulation layers around the air delivery and air return ducts as well as on the
new air ducts to protect against heat losses and condensation. Adhere the plastic nails onto the ducts,
and then attach a layer of insulation cloth with the tinfoil onto the ducts. Fix the plastic nail and then
seal tightly the joints by way of tinfoil tapes. Some other materials with good thermal insulation
properties can also be used.
●The air delivery and air return ducts should be fixed to the prefabricated ceiling boards with iron
stands. The joints of the air ducts should be sealed tightly to prevent from air leakage.
●The designing and operation of the air ducts should comply with the related state standards and
procedures for engineering.
●It is recommended to leave at least a space of 150mm between the edge of the air return duct and the
wall, and a filter screen should be placed at the air return opening.
●Muffling and vibration reduction should be taken into consideration during the designing and
operation of the air ducts. In addition, the noise source should be kept away from the crowds. It is
absolutely not allowed to design the placement of the air return opening right above the head of the
users (in the offices, lounges or other public sites).
●Installation of Condensed Water Pipes
The condensed water pipes should be kept at 5—10 degrees of gradient to facilitate discharge of the
condensed water. Thermal insulation materials should be placed at the joints of the condensed water pipes
so as to prevent from dew condensation. (As shown in Fig.7)
Thermal insulation layer
water pipe
Cover of the pipe
Fig.7: Thermal insulation of the condensed water pipe
Attention: It must be made sure that there is no leakage at the joints of the condensed water
pipes.

11
Install of ducted type indoor unit
●Designing of the Drainage Pipelines
☆The drainage pipes should be kept at a certain gradient (1/50—1/100) so as to avoid bulges of pipes
where there might be water bends.
☆When connecting the drainage pipes with the unit, care must be taken not to exert too much force on
the pipelines of either side of the unit, and the pipes should be fixed as close to the unit as possible.
☆The drainage pipes can be the locally purchased hard PVC pipes for common purposes. When making
the connections, the end of the PVC pipe should be inserted into the drainage hole. Use drainage hose
and wire bondage to fix it tightly. It is not allowed to use adhesive glue to join the drainage hole and
the drainage tube.
☆When the drainage pipeline is laid for a couple of units, the position of the shared pipeline should be
approximately 100mm lower than the drainage outlet of each unit. In this case, some special-purpose
pipes with thicker walls sill be used.
●Testing on the Drainage System
☆Upon completion of the installation of the electric appliances, the testing on the drainage system
should be performed.
☆During the testing, it should be made sure that the water flows through the pipeline in the correct
direction. Careful observations should be made on the joints to ensure that there is no leakage of water
at the joints.
☆In the case that the unit is to be installed in a new building, it is recommended that the testing be made
prior to the decoration of the ceiling.

12
Install of ducted type indoor unit
●
Function description of functional dial switch S7
☆Before power on of the main board, 4-bit dial switch must be set to decide running status of indoor
unit.
☆Function description is as below:
The DIP switch setting showed in above illustration is the default setting after manufactured.
Dial switch
Silk-screen
Function description Dial ON Dial OFF
1（S/R）
Selection of memory mode:
A. Selection between recovery mode after
power on and standby mode after power on
B. This function is effective without wired
controller.
Standby after
power on
Recovery
after power on
2（L/I）
Selection between receiver and manual
controller:
A. If manual controller is selected;
remote-control function of receiver will be
shielded.
B .If receiver is selected, manual controller
will be ineffective.
Select wired
controller to
operate
Select receiver
to operate
3（M/S）
Setting of master unit and slave indoor
unit
A. Used to solve modes conflict
B. This function is effective without wired
controller.
Master unit Slave unit
4（I/O）
Selection of ambient temp. sensor:
A. selection between ambient temp. sensor
(T amb.) of main board and ambient temp.
sensor (T amb.1) of receiver
This function is effective without wired
controller.
Select ambient
temp. sensor of
main board
Select ambient
temp. sensor of
receiver
5（L/H）
Select to choose high E.S.P or low E.S.P
fan speed
Select low
E.S.P fan
speed
Select high
E.S.P fan speed

13
Install of ducted type indoor unit
Notes:
1. When you choose to equip the receiving board (this component is optional) on the units it is
requried that set the 2nd position of S7 DIP switch to OFF position, meanwhile if need to plug the
communication cable from receiving board into 9 core terminal CN20 which locates on the mainboard,
and wired remote controller is disabled.
2. When you choosed to equip wired remote controller to the units, it needs to set the 2nd position of
S7 DIP switch to the ON position, and connect 4 core communication cable to CN19 terminal on the
mainboard; the address code on wired remote controller and indoor mainboard address code MUST
BE THE SAME, after doing this, the receiving header is disabled.
3. The driving method of the blower on OV-R224P/Na-M and OV-R280P/Na-M is Belt driving, there is
only 1 fan speed, if need to adjust the E.S.P, it is required that the adjustment of the pulley is within
safe range (please consultant technical professionals)
5 bits functional DIP switch mainboard
S7 function DIP
S1Address DIP

14
Install of ducted type indoor unit
1.Address code switch
All the indoor units of OV system must set the address code properly, else will cause communication abnormal
between outdoor and indoor unit. There are total 4 bit of address code, with address code range from 1 to 16.
Notice! When more than 1 indoor units is connected parallel, please modify the address
code setting of the units before installation, their address code should be different from each
other. (address code DIP switch locates on the ma in board of indoor units); if add wired remote
controller to the unit, make sure the address code on controller is the same as on the indoor unit.
(address code DIP switch of wired remote controller locates at the back of the controller)
☆the default setting of DIP address setting is show as blew:
Address
Default setting of address code DIP switch is 0000, and address is 1 (position showed as above)
☆Address DIP switch code list
The address code setting is based on binary, the “ON” side represents 0, while opposite side
represents 1; on address code DIP switch, there are 4 position, 4 position is high side, 1 position is low side;
Address12345678
DIPposition123412 3 4123412341234123412341234
Setvalue 000010 0 0010011000010101001101110
Address 9 10 11 12 13 14 15 16
DIP position 123412 3 4123412341234123412341234
Setvalue 000110 0 1010111010011101101111111
e.g.1: set DIP switch as “0111” represent address “8”, set DIP switch 1,2,3 positon to OFF side, while set 4
position to ON side;
e.g.1: set DIP switch as “1010” represent address “11”, set DIP switch 2,4 positon to OFF side, while
set1,3positiontoONside;
example showed as below:
Address 8: DIP value 0111 Address 11: DIP value 1010

15
Install of ducted type indoor unit
●Usage of receiving board
When choose to use remote signal receiving board, do set 2nd position on the S7 functional DIP switch
to the “OFF” side, then connect the receiving board to the main board.
For duct type indoor units, there are two options: work with remote signal receiving board or wired
remote controller; if choose to use the receiving board, the wired controller can not put be put into work at the
same time.
Fig.8 wiring between main board and receiving board
Fig.9 Power/communication Wiring illustration of wired remote controller
CN1
Back of wired remote
controller
1
CN19

16
Install of ducted type indoor unit
When connect wired controller to main board showed as Fig.9, usea4corescable to set up a
communication wiring from CN19 terminal on the main board to CN1 terminal on the wire controller. Make sure
the power is shut off before the wiring; check if the wiring is firmly and prevent any circuit shortage after
finishing this step one more time. There are 4 pieces of wires in the cable of controller. (all included in the 4 cores
cable), count from upper right direction of wiring terminal are the name of the wires: Earthed wire (GND),
communication wire A (A), communication B(B), power wire (+12V)
●Install the wired remote controller
1 324
Fig.10 Installation of wire remote controller
●Notice for installation under the guidance of Fig.10
1. Cut off power supply before install the electrical components, it is forbidden to carry out the installation with
power on;
2. Get one end of the 4 core communication cable, put it through the rectangular hole on the base board on the
wire remote controller;
3. hold the base board of controller on the wall, then fix it to the wall with M4x25 screw;
4. Plug the 4 core communication cable into the slot on the wired remote controller, then fix the controller panel
with base board together;
SN 1 2 3 4
Name Casing base, installed
into the wall
Controller Soleplate Screw M4X25 Controller Panel

17
Install of ducted type indoor unit
●Connection between the Electric Wires and the Terminals on the Terminal Plate: (As
shown in Fig.11)
A. Connection of mono-branching wires
1. Use a wire stripper to strip off about 25mm of the insulation layer at the end of the mono-branching
wire;
2. Remove the screws on the wiring board of the air conditioner unit;
3. Use the pliers to bend the end of the wire into a ring shape corresponding the size of the screw;
4. Pass the screw through the wire ring and fix it onto the wiring board.
B. Connection of multi-ply stranded wires
1. Use the wire stripper to strip off about 10mm of the insulation layer of the stranded wires;
2. Remove the screws on the wiring board of the air conditioner unit;
3. Use the wire pressing pliers to press the ends of the multi-ply stranded wires onto the terminals
corresponding to the size of the screws;
4. Pass the screws through the terminals of the multi-ply stranded wires and fixes them onto the
wiring board.
25
10
Insulation
layer
B.Multi-ply stranded wireA.Mono-branching wire
Wiring terminal
Fig.11
Warning:
1. If the power cord or signal cord of the unit is damaged, special-purpose cords must be used for
replacement;
2. Please identify the voltages for the components indicated on the nameplate before doing the wire
connection, and then connect the wires in accordance with the schematic diagram of wiring.
3. The air conditioner unit should use the special-purpose power cord, and should be equipped with
breaker of air switch so as to handle the occurrence of overloads;
4. The air conditioner unit must be properly grounded to prevent from the damages caused by the failure
of insulation;
5. All the distribution wires must use the press-connecting terminals or single wires. The direct
connection between the multi-ply stranded wires and the terminal board might lead to sparking;
6. All the wiring must follow the schematic diagram for the electric circuits. Any erroneous wiring and
connection might result in the abnormal operations or damages of the air conditioner unit;

18
Install of ducted type indoor unit
7. All the wiring must follow the schematic diagram for the electric circuits. Any erroneous wiring
and connection might result in the abnormal operations or damages of the air conditioner unit;Do
not allow the power cord to contact the pipelines or any moving parts like the compressor or fan;
8. The internal wiring of the air conditioner unit should not be altered without authorization. The
manufacturer shall not be responsible for any losses or abnormal operations incurred from such
unauthorized alterations.
●Connection of Distribution (Communication) Wires:
1、Open the cover of the electric box of the indoor unit;
2、Pass the distribution (communication) wire through the rubber gasket;
3、Insert the distribution (communication) wire into the three pin stands of CN17 or CN18 on the
electric circuit board of the indoor unit;
4、Bind the distribution (communication) wires firmly together and fix them.
●Connection of Power Supply Lines:
Attention: The power supply for various indoor units must be from the unified power
supply.
A、Air conditioner units using single-phase power supply
1. Remove the cover of the electric box of the indoor unit;
2. Pass the power supply cord through the rubber gasket;
3. Connect the power cord to the L and N terminals as well as the grounding screw;
4. Bind the cord and wires firmly together and fix them properly;
B、Air conditioner units using three-phase power supply。
1.Put power cable through rubber insulation ring。
2.Connect the power cord to the L1、L2、L3 and N terminals as well as the grounding screw。
3. Fix the power cable firmly by cable fixing clip。