Pioneer YN030GLFI22M2D User manual

Air Conditioner Service Manual
0
Multi Inverter air conditioner
Service Manual
Models
WT009GLFI22HLD
WT012GLFI22HLD
WT018GLFI22HLD
WT024GLFI22HLD
YN020GLFI22M2D
YN030GLFI22M2D
YN040GLFI22M2D
CONTENTS
1. Important Notice
2. Product Dimensions
3. Refrigeration cycle diagram
4. Operation details
5. Wiring diagram
6. Precaution
7. Names of parts
8. Installation
9. Trouble shooting

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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:
1. Model No. with Indoor or Outdoor
2. No. in the Explosion View
3. Part Name
4. The quantity you ordered

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3. Refrigeration cycle diagram
TIN1 PMV1
TIN2
TIN3
PMV2
PMV3
PMV4
TIN4
T2B1
T2B24
T2B3
T2B4 ST
CONDENSER
liquid
storage
pot
T3
T4
TP
HP
COMPRESSOR
Optional
Evaporator

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Electronic Controller
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.
150 seconds delay for 4-way valve---The 4-way valve will be ceased for 150 seconds
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 discharge pipe, when temperature on discharge pipe
exceeded the limit 115℃, system control will shut down the compressor and the display board
will show the error code.
(3) Lower voltage protection
WhenAC voltage <160V, DC voltage<170V, unit will be shut down for protection and recover while
theAC voltage ˃170 V, DC voltage ˃190V.
(4) Over voltage protection
When AC voltage ˃275V, DC voltage ˃400V unit will be shut down and recover while AC
voltage<255V, DC voltage<390 V.
(5) Over current protection
When the current of outdoor unit is overload, controller will drop the operation frequency or shut
down the unit immediately and show error code.
(6) Condenser temperature protection
When condenser temperature≥65℃and keep 10s, the air conditioner will shut down, and
show error code, and recover while condenser temperature<52℃and the compressor stop for
3minutes.
(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.
(8) Evaporator freeze protection.
When evaporator temperature<2℃, the controller will drop compressor operate frequency.
When evaporator temperature<0℃and keep 1 minute, the expand valve of the unit will stop.
When all of the operating unit enter freeze protect, the compressor will stop and recover while
evaporator temperature and stop for 3 minutes.
2. “Feel” Mode Operation
(1) 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.
(2) If the unit have activate the AUTO restart, when the power off and supply again, the unit will
judge the condition again and enter the “Feel” mode.
(3) If the mode is change to “Feel” from other mode, the “Feel” mode doesn’t operate until
compressor stop for more than 3 minutes.
Mode
Initial Room Temperature
Initial Set Temperature
COOLING
RT=26℃
23℃
DRY
26℃>RT≥20℃
RT-2℃
HEATING
RT<20℃
23℃
Fan
RT<20℃
RT

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In the “Feel” mode, when the controller receives the up or down signal of temperature, the set
temperature can adjust by 1℃upper or lower. The biggest you can adjust by 2℃upper or lower.
3. “COOLING” Mode Operation
(1) Compressor frequency control
According to difference room temperature and set temperature (δt = 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
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℃,the controller will shut
down compressor and show error code, while the ambient temperature is over 1℃, 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 δ t, as the
following diagram:
4.“DRY” Mode Operation
(1)The system for DRYoperation 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℃”. After that, the system will operate in cooling mode with
lowest fan speed. 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℃, the compressor will stop and operates again at RT≥14℃.
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 δ t to make the room
temperature closing to the set temperature.
(2) Indoor fan motor control
1) ColdAir Prevention Control
The function is intended to prevent cold air from being discharged when heating mode
selected or while in defrosting.
The indoor fan speed will be controlled as following.
RT-ST
℃
4.0
3.0
1.5
1.0
δt come down
δt come up
High fan
Min fan
Low fan

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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 δtas the following:
(3) 4-way valve control
In heating mode, 4-way valve will power on ahead of compressor for 8seconds, 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) Outdoor fan motor control
In heating mode, the outdoor fan motor will power on ahead of compressor 5 seconds, and
cut off for 30seconds later than compressor.
(5) Defrosting
Defrosting is controlled by the microprocessor.
When the unit operate 30 minutes accumulated and the compressor operation more than 3
minutes continuously, one of the following conditions is satisfied, unit comes into defrosting:
a. When FrostDeg ≥-5℃, and OPT ≤-5℃,the .2 times defrosting interval time is 45 minutes.
b. When -10℃≤FrostDeg < -5℃, and OPT < FrostDeg , the .2 times defrosting interval time is
45 minutes.
RT-ST
δt come down
δt come up
℃
Breeze
Temperature up
Temperature down
Setting
Low fan
Stop
37℃
33℃
25℃
33℃
25℃
20℃
4.0
3.0
1.5
1.0
High fan
Min fan
Low fan
Indoor pipe Temperature
3S
5S
30S
120S
ON
OFF
ON
ON
OFF
OFF
4-WAY valve
Outdoor fan motor
Compressor
5S
30S
ON
ON
OFF
OFF
Outdoor fan motor
Compressor

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c. When -13℃≤FrostDeg < -10℃, and OPT < FrostDeg , the .2 times defrosting interval time is
45 minutes.
d. When -15℃≤FrostDeg < -13℃, and OPT < FrostDeg , the .2 times defrosting interval time is
65 minutes.
e. When -15℃≤FrostDeg < -10℃, and OPT < FrostDeg , the .2 times defrosting interval time is
75 minutes.
f. When FrostDeg < -15℃, and OPT < -15℃, the .2 times defrosting interval time is 75 minutes.
FrostDeg = C*OAT-α
OAT: Outdoor environment temperature.
When OAT< 0℃, C=0.8, when OAT≥0℃, C=0.6
α=8
Before the air con comes into defrosting, compressor running frequency drop down to a
lower frequency firstly, then the compressor shuts down.
In defrosting, all protection function are available.
T1 T2 T3 T4 T5 T7 T8 T9 T10T6
Compressor Frequency
Outdoor Fan Motror
4-way Valve
ON
OFF
ON
OFF
ON
OFF
Defrost Hightest Frequency
T
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
Times
Drop frequency
or stop
50s
5s
5s
Rise
frequency
2-11Min
Stop
Defrost
50s
10s
Rise frequency
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:
a. Outdoor coil Temperature (OPT) >5℃and keeps 30 seconds.
b. Outdoor coil Temperature (OPT) >10℃and keeps 2 seconds.
c. Continue 11minutes defrost Operation.
(5) Indoor exchanger overheat protection
When Indoor exchanger Temperature (IPT) is higher than 54℃, unit comes into indoor exchanger
overheat protection. The compressor drops its frequency.
If IPT≥65℃and keep for 30 seconds, control system shut down compressor, and recover while IPT
drop less than 52℃.
5. “SLEEP” mode
When the SLEEP button is pressed, theAC operates as following:
The indoor fan speed is set at low speed, the power lamp and the sleep lamp is on,
the display of temperature will close after 30 seconds.
When selecting COOLING/DRY operation with SLEEP mode, the set temperature will be
raised by 1℃1 hour later and by 2℃2 hour later, after 3 hours, the set temperature will be
raise by 3℃and keeps 2hours. And then the temperature is Set+2℃, after 1 hour, the

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temperature is set temperature and keep.
When selecting HEATING operation with SLEEP mode, the set temperature will be dropped
by 1℃1 hour later and 2℃2 hours later, after 3 hours, the set temperature will be dropped by
3℃and keep 2 hours.And then the temperature is Set-2℃, after 1 hour, the temperature is
set temperature and keep.
6. EMERGENCY Operation
When the EMERGENCY Operation switch is pressed, “Beep”a short sound, COOLING mode
is selected, two short sound the HEATING mode selected, and a long sound the unit off of 3s.
During the unit operation in emergency operation, when the unit receive the signal of remote
controller, the unit will operates by remote.
When the remote controller missing, failed or the batteries run down, press the EMERGENCY
Operation switch on front of the indoor unit for function test.
NOTE: Do not press the EMERGEMCY Operation switch during normal operation.
7. AUTO-RESTART Function (Option)
While air conditioner is operating in one mode, all of its operation data, such as working
mode, preset temperature etc. would be memorized into IC by main PCB. If power supply cut off
due to reasons and recover again, the AUTO-RESTART function will set synchronously and
the air conditioner would work at the same mode as before.
Auto-restart Pre-setting (optional):
IfAuto-restart function is needed, follow the steps below to activate this function:
1) Pulling the air-con's plug out of socket.
2) Pressing and holding the Emergency button (ON/OFF) on the indoor, then insert the plug
into the socket again.
3) Keep pressing the Emergency button for more than 10 seconds until three short beeps
heard, the Auto-restart function been activated.
4) When the unit in operation, press the timer button 10 times in 8s, the Auto-restart
function will be active，if the Auto-restart is active, the Auto-restart off.
8. Water pump control(cassette and duct type)
When the unit operates in cool or dry mode, the water pump operates, once the compressor
off or change to other mode, the water pump stop after 10 minutes.
Anytime, when the unit check the water full, the water pump operates, the unit stop and
display the water full code. When the water full eliminate, the water pump will stop after 10
minutes.
When check the water pump switch open for 8 seconds continuous, enter water full
protection, and check the water pump switch on for 180 seconds continuous, the water full
protection exit.
9. Protection and Failure Display
When protection display is available, controller will show error code, digital LED shows
error code and setting temperature by turns.
If there is more than one failure, it will show error codes according to the error list sequence.
To insure the signal communication of indoor and outdoor unit, any failure code relates to
outdoor unit will remain display for 2 minutes maximum after it’s recovered.
Among all the failure codes, sensor failure can be recovery automatically once it comes normal.

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Error list
Failure Type
Indoor LED
Code
CASSETTE
Outdoor light
blink time (n)
LED1
LED2
LED3
LED4
Indoor and outdoor communication failure
E0
●
●
●
◎
7
Outdoor communication failure
EC
◎
◎
●
●
15
Indoor room temperature sensor (IRT)
E1
●
●
◎
●
25
Indoor coil temperature sensor (IPT)
E2
●
●
◎
◎
26
Outdoor coil temperature sensor (OPT)
E3
●
◎
●
●
10
IPM over current protect
E4
●
◎
●
◎
40
Compressor phase-deficient operation
34
Model configuration wrong
E5
●
◎
◎
●
29
Indoor fan motor fault
E6
●
◎
◎
◎
21
Outdoor temperature sensor
E7
◎
●
●
●
9
Exhaust temp. sensor
E8
◎
●
●
◎
11
IPM drive and module fault
E9
◎
●
◎
●
30
Outdoor fan motor fault (DC motor)
EF
◎
◎
◎
◎
16
Current sensor fault
EA
◎
●
◎
◎
13
Indoor EEPROM fault
EE
◎
◎
●
◎
27
Outdoor EEPROM fault
EE
◎
◎
◎
●
19
Temp. switch fault ( on top of the
compressor)
EP
-
-
-
-
8
Voltage sensor fault
EU
○
●
●
◎
12
Suction temperature sensor fault
EH
-
-
-
-
18
Outlet temperature sensor A fault
Ey
○
●
◎
●
47
Outlet temperature sensor B fault
48
Inlet temperature sensor A fault
En
○
●
◎
◎
51
Inlet temperature sensor B fault
52
Protection display code list:
○--light ●--off ◎—flash
Protection Type
Indoor LED
Code
CASSETTE
Outdoor light
blink time (n)
LED1
LED2
LED3
LED4
Module protection (hardware control)
P0
-
-
-
-
1
lower voltage protection
P1
○
●
●
○
2
Overcurrent protection
P2
○
●
○
●
3
Discharge over temperature
protection
P4
○
○
●
●
4
Too cool protection in cooling mode
P5
-
-
-
-
32
Overheat protection in cooling mode
P6
○
○
○
●
5
Overheat protection in heating mode
P7
○
○
○
○
33
Outdoor over temperature
/ lower temperature protection
P8
-
-
-
-
31
Drive protection (software control )
P9
-
-
-
-
6
Model different
PA
●
●
○
○
-
Water full protect
D3
●
○
○
◎
-
High pressure protection
H1
-
-
-
-
-

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Outdoor failure display
There is a LED on outdoor power board, it blinks 1s ON and 1s OFF while compressor standby and
it always light (ON) while compressor running; If there is failure happened on ODU,The indicator (LED)
alerts the fault in a cycle as such that it is bright for 0.5 seconds, dark for 0.5 seconds, blinks “n” times
and then dark for 3 seconds. For details as table below.
Display on outdoor power source board:
blink time (n)
Failure
1
PM protection
2
Over voltage /lower voltage
3
Overcurrent
4
Exhaust over temperature protection
5
Outdoor coil over temperature protection
6
Drive fault and protection (V1，VP1)
7
Communication fault with indoor unit
8
Compressor overheat fault (compressor top switch)
9
Short-circuit / open-circuit fault of outdoor temperature sensor
10
Short circuit / open-circuit fault of outdoor heat exchanger temperature
11
Short-circuit / open-circuit fault of exhaust temperature sensor
12
Voltage sensor fault
13
Current sensor fault
14
PM fault
15
Communication fault between power source board and IPM
16
No feedback from DC fan motor(outdoor unit)
17
Defrost state

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. Precaution
.1 SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLATION
Read this guide before installing and using the appliance.
During the installation of the indoor and outdoor units the access to the working area should
be forbidden tochildren.
Unforeseeable accidents could happen.
Make sure that the base of the outdoor unit is firmly fixed.
Check that air cannot enter the refrigerant system and check for refrigerant leaks when
moving the air conditioner.
Check that air cannot enter the refrigerant system and check for refrigerant leaks when
moving the air conditioner.
The ratings of the fuse installed in the built in-control unit are T 5A / 250V.
The user must protect the indoor unit with a fuse of suitable capacity for the maximum input
current or with another overload protection device.
Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch or
power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding the risk
of electric shock or fire due to insufficient contact.
Check that the socket is suitable for the plug, otherwise have the socket changed.
The appliance must be fitted with means for disconnection from the supply mains having a contact
separation in allpoles that provide full disconnection under over voltage category III conditions, and
these means must be incorporated in the fixed wiring in accordance with the wiring rules.
The air conditioner must be installed by professional or qualified persons. Do not install the appliance
at a distance of less than 50 cm from inflammable substances (alcohol, etc.) Or from pressurized
containers (e.g. spray cans).
If the appliance is used in areas without the possibility of ventilation, precautions must be taken to
prevent any leaks of refrigerant gas from remaining in the environment and creating a danger of fire.
The packaging materials are recyclable and should be disposed of in the separate waste bins .Take
the air conditioner at the end of its useful life to a special waste collection center for disposal.
Only use the air conditioner as instructed in this booklet. These instructions are not intended to cover
every possible condition and situation. As with any electrical household appliance, common sense and
caution are therefore always recommended for installation, operation and maintenance.
The appliance must be installed in accordance with applicable national regulations.
Before accessing the terminals, all the power circuits must be disconnected from the power supply.
The appliance shall be installed in accordance with national wiring regulations.
This appliance can be used bychildren aged from 8 years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision
or instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children

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without supervision.
.2 SAFETY RULES AND RECOMMENDATIONS FOR THE USER
Do not try to install the conditioner alone; always contact specialized technical personnel. Cleaning
and maintenance must be carried out by specialized technical personnel. In any case disconnect
the appliance from the mains electricity supply before carrying out any cleaning or maintenance.
Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch or
power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding the risk
of electric shock or fire due to insufficient contact.
Do not pull out the plug to switch off the appliance when it is in operation, since this could create a
spark and cause a fire, etc.
This appliance has been made for air conditioning domestic environments and must not be used for
any other purpose, such as for drying clothes, cooling food, etc.
The packaging materials are recyclable and should be disposed of in the separate waste bins. Take
the air conditioner at the end of its useful life to a special waste collection center for disposal.
Always use the appliance with the air filter mounted. The use of the conditioner without air filter
could cause an excessive accumulation of dust or waste on the inner parts of the device with
possible subsequent failures.
The user is responsible for having the appliance installed by a qualified technician, who must check
that it is earthed in accordance with current legislation and insert a thermomagnetic circuit breaker.
The batteries in remote controller must be recycled or disposed of properly. Disposal of Scrap Batteries
--- Please discard the batteries as sorted municipal waste at the accessible collection point.
Never remain directlyexposed to the flow of cold air for a long time. The direct and prolonged exposition
to cold air could be dangerous for your health .Particular care should be taken in the rooms where there
are children, old or sick people.
If the appliance gives off smoke or there is a smell of burning, immediately cut off the power supply
and contact the Service Centre.
The prolonged use of the device in such conditions could cause fire or electrocution.
Have repairs carried out only by an authoritative Service Centre of the manufacturer. Incorrect
repair could expose the user to the risk of electric shock, etc.
Unhook the automatic switch if you foresee not to use the device for a long
time. The airflow direction must be properly adjusted.
The flaps must be directed downwards in the heating mode and upwards in the cooling mode.
Only use the air conditioner as instructed in this booklet. These instructions are not in ended to
cover every possible condition and situation. As with any electrical household appliance, common
sense and caution are therefore always recommended for installation, operation and maintenance.
Ensure that the appliance is disconnected from the power supply when it will remain inoperative for a
long period and before carrying out any cleaning or maintenance.
Selecting the most suitable temperature can prevent damage to the appliance.

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.3 SAFETY RULES AND PROHIBITIONS
Do not bend, tug or compress the power cord since this could damage it. Electrical shocks or fire
are probably due to a damaged power cord. Specialized technical personnel only must replace a
damaged power cord.
Do not use extensions or gang modules.
Do not touch the appliance when barefoot or parts of the body are wet or damp.
Do not obstruct the air inlet or outlet of the indoor or the outdoor unit. The obstruction of these
openings causes a reduction in the operative efficiency of the conditioner with possible consequent
failures or damages.
In no way alter the characteristics of the appliance.
Do not install the appliance in environments where the air could contain gas, oil or sulphur or
near sources of heat.
This appliance is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Do not climb onto or place any heavy or hot objects on top of the appliance.
Do not leave windows or doors open for long when the air conditioner is operating.
Do not direct the airflow onto plants or animals.
A long direct exposition to the flow of cold air of the conditioner could have negative effects on plants
and animals.
Do not put the conditioner in contact with water. The electrical insulation could be damaged and
thus causing electrocution.
Do not climb onto or place any objects on the outdoor unit
Never insert a stick or similar object into the appliance. It could cause injury.
Children should be supervised to ensure that they do not play with the appliance. If the supply cord is
damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in
order to avoid a hazard.