Pioneer WYT Series Bedienungsanleitung

CS78421-548-754

DUCTLESS MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMP

IMPORTANT NOTICE:

Please read this manual carefully before installing

or operating your new air conditioning system.

Be sure to save this manual for future reference.

Service Manual

WYT Inverter Series

For 9,000-36,000 BTU/hr Systems

Table of Contents

Models

Trouble shooting

1. Important Notice

2. Product Dimensions

3. Refrigeration cycle diagram

4. Operation details

5. Wiring diagram

6. Explosion view and parts

7. Precaution

8. Names of parts

9. Installation

10.

WYT009ALFI19RL

WYT009GLFI19RL

WYT012ALFI19RL

WYT012GLFI19RL

WYT018GLFI19RL

WYT024GLFI19RL

WYT036GLFI19RL

Air Conditioner Service Manual

1. Important Notice

This service manual is intended for use by individuals possessing adequate

backgrounds of electrical, electronic and mechanical experience. Any

attempt to repair the appliance may result in personal injury and property

damage. The manufacturer or seller cannot be responsible for the

interpretation of this information, nor can it assume any liability in

connection with its use.

The information, speciﬁcations and parameter are subject to change due to

technical modiﬁcation or improvement without any prior notice. The

accurate speciﬁcations are presented on the nameplate label.

How to order spare parts

To have your order ﬁlled promptly and correctly, please furnish the

following information:

Model No. with Indoor or Outdoor

No. in the Explosion View

Part Name

The quantity you ordered

Air Conditioner Service Manual

2. Product Dimensions

Indoor Unit:

Model Indoor unit(mm/inch)

A B C

(10.2)

WT036GLFI19HLD 1186(46.7) 340(13.4) 258(10.2)

WT009GLFI19HLD 811(31.9) 292(11.5) 203(7.99)

WT012GLFI19HLD 811(31.9) 292(11.5) 203(7.99)

WT009ALFI19HLD 811(31.9) 292(11.5) 203(7.99)

WT012ALFI19HLD 811(31.9) 292(11.5) 203(7.99)

WT018GLFI19HLD 1010(39.8) 315(12.4) 220(8.7)

WT024GLFI19HLD 1186 (46.7) 340(13.4) 258

Air Conditioner Service Manual

Outdoor Unit:

Model Outdoor unit(mm/inch)

D E F G I J K

787(31.0) 498(19.6) 290(11.4) 415(16.3) 225(8.9) 48.5(1.9) 52(2)

810(31.9) 549(21.6) 305(12.0) 433.8(17.1) 278(10.9) 48(1.9) 62(2.4)

863(34) 602(23.7) 349(13.7) 516(20.3) 314(12.4) 54(2.1) 63(2.5)

927(36.5) 699(27.5) 380(15) 586(23) 347.5(13.7) 58.6(2.3) 63(2.5)

975(38.4) 808(31.8) 433(17) 675(26.6) 398(15.7) 50(2) 63(2.5)

YN036GLFI19RPD

YN009GLFI19RPD

YN009ALFI19RPD

YN012ALFI19RPD

YN018GLFI19RPD

YN024GLFI19RPD

YN012GLFI19RPD

Air Conditioner Service Manual

3. Refrigeration cycle diagram

Cooling only

Heat pump

Capillary

Compressor

Accumulator

Heat exchange

(condenser)

Heat exchange

(Evaporator)

2-way valve

Liquid side

3-way valve

Gas side

Cooling

Heating

Gas side

3-way valve

Liquid side

2-way valve

Heat exchange

(Evaporator)

Heat exchange

(condenser)

Accumulator

Compressor

4-way valve

Capillary Assembly

Check valve

Note: Each mode and relevant function will be further speciﬁed in following pages.

Remote controller

Air Conditioner Service Manual

4. Operation Details

Remote Control

The remote controller is not presetting as Cooling Only Air Conditioner or Heat Pump by

manufacturer.

Each time after the remote controller replace batteries or is energized, the arrowhead will ﬂashes on

the front of Heat or Cool on LCD of the remote controller.

User can preset the remote controller type depending on the air conditioner type you have purchased

as follows:

Press any button when the arrowhead ﬂashes on the front of Cool , Cooling Only is set.

Press any button when the arrowhead ﬂashes on the front of Heat , Heat Pump is set.

If you don t press any button within 10 seconds, the remote controller is preset as Heat Pump

automatically.

Note :

If the air conditioner you purchased is a Cooling Only one, but you preset the remote controller as

Heat Pump, it doesn t bring any matter. But if the air conditioner you purchased is a Heat Pump one,

and you preset the remote controller as Cooling Only, then you CAN NOT preset the Heating

operation with the remote controller.

MODE button

ECO button

FAN SPEED button

TEMP UP button

TIMER button

SLEEP button

TEMP DOWN button

To select the mode of operation.

In cooling mode,press this button ,the temperature

will increase 2 on the base of setting temperature:

In heating mode, press this button, the temperature

will decrease 2 on the base of setting temperature.

To switch the conditioner on and oﬀ.

To select the fan speed of auto/low/mid/high.

To set automatic switching-on/oﬀ.

Increase the temperature or time by 1 unit.

To activate the function SLEEP .

Decrease the temperature or time by 1 unit.

DISPLAY button

In cooling mode, press this button, the unit will give

the maximum cooling temperature with 16

In heating mode, press this button, the unit will give

the maximum heating temperature with 31 .

SWING button

To activate or deactivate of the movement of the

DEFLECTORS .

HEALTH button

To switch - on /oﬀ HEALTHY funtion.

It is a button

which controls the ionizer or plasma generator only

for inverter type.

ON/OFF button

To LED display (if present)switch on/oﬀ the

TURBO button

SWING button

To activate or deactivate of the movement of the

DEFLECTORS .

Air Conditioner Service Manual

4.2 Electronic Controller

4.2.1 Safety Protection

(1) Time Delay for Safety protection

 3 minutes delay for compressor ---The compressor is ceased for 3minutes before

restarting to balance the pressure in the refrigeration cycle in order to protect the

compressor.

 2 minutes delay for 4-way valve ---The 4-way valve will be ceased for 2 minutes late

after compressor to prevent the refrigerant-gas abnormal noise when the HEATING

operation is OFF or switch to the other operation mode.

(2) Discharge temperature protection

There is a temperature sensor on top of compressor, when temperature on top of

compressor

exceeded the limit, system control will shut down the compressor and the display board

will show the error code.

(3) Lower voltage protection

When AC voltage ≤158V and keep it for 10 seconds, unit will be shut down for protection.

(4) Over voltage protection

When AC voltage ≥260V, unit will be shut down and recover while AC≤255V.

(5) Over current protection

When the current of outdoor unit is overload, controller shut down the unit immediately and

show error code.

(6) Compressor abnormity protection

When compressor start on or in the process of running, if there is no feedback to controller or

load of compressor is abnormity, the air conditioner will shut down, and show error code.

(7) IPM module protection

IPM module has high temperature & over current protection itself, if there is signal feedback

to IPM, the outdoor unit will shut down, LED on outdoor PCB will show the error code.

4.2.2 “Feel” Mode Operation

(8) When the “Feel” mode is selected, the operation mode and initial temperature set are

determined by the initial room temperature at start-up of the operation except to turn oﬀ the air

conditioner and operates it again.

(9) If the mode is change to “Feel” from other mod e, the “Feel” mode doesn’t operate until

compressor stop for more than 3 minutes.

Mode Initial Room Temperature Initial Set Temperature

COOLING RT=26℃(78.8℉) 23℃(73.4℉)

DRY 26℃>RT≥20℃(68℉) RT-2℃(35.6℉)

HEATING for Heat Pump/

FAN for Cooling Only RT<20℃(68℉) -

 In the “Feel” mode, when the controller receives the up or down signal of temperature,

the set

temperature can adjust by 1℃(33.8℉) upper or lower. The biggest you can adjust by 2℃(35.6

℉) upper or lower.

4.2.3. “COOLING” Mode Operation

(1) Compressor frequency control

According to diﬀerence room temperature and set temperature (

t = RT-ST), running frequency

of compressor is controlled by electronic controller. When room temperature is much higher than

set temperature, the compressor will start at a high frequency, and as room temperature goes

Air Conditioner Service Manual

down, the compressor running frequency will go down. When room temperature is lower than set

temperature, the compressor will run at very low frequency. In general, unit will change its

running frequency according to δt to make room temperature closing to set temperature.

(2) Outdoor temperature aﬀects running frequency of the compressor

Outdoor temperature aﬀect compressor’s running frequency. Diﬀerence inlet temperature of

outdoor unit is adapted by diﬀerence compressor running frequency. While outdoor temperature

is about 30℃, the compressor will run in high frequency.

If unit run in “cooling” mode and outdoor temperature is less than -2℃(-35.6℉), the controller

will shut down compressor and show error code, while the ambient temperature is over 1℃(33.8

℉), the compressor will run automatically.

(3) Auto fan control in cooling mode

In cooling mode (include cooling in “Feel ” mode), fan speed is determined by

t, as the

following diagram:

4.2.4.“DRY” Mode Operation

(1) The system for DRY operation used the same refrigerant circle as the cooling one.

(2) When the system operates in DRY mode, at ﬁrst it operates in cooling mode, the set

temperature (ST) is “RT-2℃(35.6℉)”. After that, t he system will operate in cooling mode

with lowest fan speed for 30 minutes and then change to middle speed for 30seconds as a

cycle. During the course of this operation, you can’t use remote controller to adjust the fan

speed but you can control the vane direction.

(3) In the dry mode, when RT≤12℃(53.6℉), the compressor will stop and operates again at RT ≥

14℃(57.2℉).

4.2.5. “HEATING” Mode Operation (available for Heat Pump only)

(1) Frequency control

Same as the frequency control in cooing mode, the running frequency of compressor is

controlled by controller. Unit change its running frequency according to

t to make the room

temperature closing to the set temperature.

(2) Indoor fan motor control

1) Cold Air Prevention Control

 The function is intended to prevent cold air from bei ng discharged when heating mode

selected or while in defrosting.

 The indoor fan speed will be controlled as following.

RT-ST

℃(℉)

3.5(38.3)

3.0(37.4)

1.5(34.7)

1.0(33.8)

δt come down

δt come up

High fan

Min fan

Low fan

Breeze

Temperature up

Temperature down

Setting

Low fan

Stop

37℃(98.6℉)

33℃(91.4℉)

25℃(77℉)

34℃(93.2℉)

28℃(82.4℉)

22℃(71.6℉)

Air Conditioner Service Manual

 In heating operation, if air conditioner turn oﬀ, the indoor fan motor will run most for 30

seconds since the stop of compressor.

2) Auto fan control (heating)

In heating mode (include in “FEEL” mode), fan speed is determined by δt as the following:

(3) 4-way valve control

In heating mode, 4-way valve will power on ahead of compressor for 5 seconds, and cut oﬀ

for 2 minutes later than compressor . 4-way valve will not power oﬀ unless the machine to be

switched oﬀ, mode changed or on the process of defrosting.

(4) Defrosting

Defrosting is controlled by the microprocessor.

When one of the following conditions is satisﬁed, unit comes into defrosting:

Outdoor heat exchanger Temperature (OPT) is continuously less than 3℃(37.4℉) while the

unit runs for more than 40 minutes, and OPT is keeping under -6℃ for more than 3 minutes.

Outdoor heat exchanger Temperature (OPT) is continuously less than 3℃(37.4℉)

meanwhile the unit runs for more than 80 minutes, and OPT is keeping under -4℃(-39.2℉)

for more than 3 minutes.

Outdoor heat exchanger Temperature (OPT) is continuously less than 3℃(37.4℉) while the

unit runs for more than 120 minutes, and OPT is keeping below -2℃(35.6℉) for more

than 3 minutes.

Before the air con comes into defrosting, compressor running frequency drop down to a

lower frequency ﬁrstly, then the compressor shuts down.

In defrosting, the max. frequency of compressor is F9 (a little less than the highest

frequency ). In this period all protection function are available.

In defrosting, LED showing by winking.

No matter what AC come into or out of defrosting, indoor fan motor speed is the same as

Cold Air Prevention Control.

While one of the following conditions is satisﬁed, unit comes out of defrosting and shifts to

heating mode:

Outdoor coil Temperature (OPT) ≥ 15℃(59℉).

The time of defrosting keeps for more than 10 minutes.

RT-ST

δt come down

δt come up

℃(℉)

3.5(38.3)

3.0(37.4)

1.5(34.7)

1.0(33.8)

High fan

Min fan

Low fan

3.5

1.5

Compressor ON

OFF

NORMAL 800

4-way valve

Expansion valve

Outdoor fan motor

50S Defrosting time ≤10Mins 15S 15S

10S

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