Friedrich MWM09Y1J User manual

Service Manual
MWM09Y1J/MRM09Y1J
MWM12Y1J/MRM12Y1J
(Refrigerant R410A)
Models:

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Table of Contents
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6XPPDU\ ......................................................................................................................1
6SHFL¿FDWLRQV ..........................................................................................................2
2.1 Specification Sheet ...........................................................................................................2
2.2 Operation Characteristic Curve ........................................................................................4
2.3 Capacity Variation Ratio According to Temperature .........................................................4
2.4 Cooling and Heating Data Sheet in Rated Frequency .....................................................5
2.5 Noise Curve ......................................................................................................................5
2XWOLQH'LPHQVLRQ'LDJUDP ........................................................................6
3.1 Indoor Unit ........................................................................................................................6
3.2 Outdoor Unit .....................................................................................................................6
5HIULJHUDQW6\VWHP'LDJUDP ......................................................................7
(OHFWULFDO3DUW...........................................................................................................8
5.1 Wiring Diagram .................................................................................................................8
5.2 PCB Printed Diagram .....................................................................................................10
)XQFWLRQDQG&RQWURO ......................................................................................12
6.1 Remote Controller Introduction .....................................................................................12
6.2 Brief Description of Modes and Functions ......................................................................15
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,QVWDOODWLRQ ................................................................................................................23
8.1 Installation Dimension Diagram ......................................................................................23
8.2 Installation Parts-checking ............................................................................................25
8.3 Selection of Installation Location ....................................................................................25
8.4 Electric Connection Requirement ..................................................................................25
8.5 Installation of Indoor Unit ................................................................................................25
8.6 Installation of Outdoor Unit .............................................................................................27
8.7 Vacuum Pumping and Leak Detection ...........................................................................29
8.8 Check after Installation and Test Operation ...................................................................29

6HUYLFH0DQXDO
Table of Contents
0DLQWHQDQFH ............................................................................................................30
9.1 Error Code List ...............................................................................................................30
9.2 Troubleshooting for Main Malfunction ............................................................................38
9.3 2-way, 3-way Valve Appearance .....................................................................................47
9.4 Troubleshooting for Normal Malfunction .........................................................................54
([SORGHG9LHZDQG3DUWV/LVW ..............................................................56
10.1 Indoor Unit ....................................................................................................................56
10.2 Outdoor Unit .................................................................................................................58
5HPRYDO3URFHGXUH .......................................................................................60
11.1 Removal Procedure of Intdoor Unit ..............................................................................60
11.2 Removal Procedure of Outdoor Unit ............................................................................66
$SSHQGL[ ........................................................................................................................70
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................70
Appendix 2: Configuration of Connection Pipe .....................................................................70
Appendix 3: Pipe Expanding Method ...................................................................................71
Appendix 4: List of Resistance for Temperature Sensor ......................................................72

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Technical Information
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Technical Information
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Model MWM09Y1J
MRM09Y1J
MWM12Y1J
MRM12Y1J
Product Code CB146035101_L13396 CB146035001_L13396
Power
Supply
Rated Voltage V~ 115 115
Rated Frequency Hz 60 60
Phases 1 1
Power Supply Mode Outdoor Outdoor
Cooling Capacity (Min~Max) Btu/h 9000(3500~11000) 11800(3300~12500)
Heating Capacity (Min~Max) Btu/h 9800(2500~11000) 13000(3400~13500)
Cooling Power Input (Min~Max) W 750(220~1100) 1260(260~1340)
Heating Power Input (Min~Max) W 830(230~1230) 1320(250~1360)
Cooling Power Current A 9 15
Heating Power Current A 9.5 15.5
Rated Input W 1230 1360
Rated Current A 17.0 18.2
Air Flow Volume(SH/H/M/L/SL) CMF 330/277/224/188/- 341/288/235/200/-
Dehumidifying Volume Pint/h 1.69 2.96
EER (Btu/h)/W 12 9.4
COP (Btu/h)/W 12 9.8
SEER (Btu/h)/W 16 16
HSPF (Btu/h)/W 8.6 8.6
Application Area yd214.4-21.5 19.14-28.7
Indoor
Unit
Model of indoor unit MWM09Y1J MWM12Y1J
Product Code CB146N35100_L13396 CB146N35000_L13396
Fan Type Cross-flow Cross-flow
Diameter Length(DXL) inch Φ3 5/8X23 3/8 Φ3 5/8X23 3/8
Fan Motor Cooling Speed (SH/H/M/L/SL) r/min 1300/1100/900/700/- 1350/1150/950/750/-
Fan Motor Heating Speed (SH/H/M/L/SL) r/min 1300/1150/980/820/- 1350/1200/1000/850/-
Output of Fan Motor W 15 15
Fan Motor RLA A 0.38 0.38
Fan Motor Capacitor μF 4 4
Input of Heater W / /
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ2/7 Φ2/7
Row-fin Gap inch 2-1/18 2-1/18
Coil Length (LXDXW) inch 24X17/18X11 4/7 24X17/18X11 4/7
Swing Motor Model MP24BA MP24BA
Output of Swing Motor W 2.4 2.4
Fuse A 3.15 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 41/37/35/32/- 43/39/35/32/-
Sound Power Level (SH/H/M/L/SL) dB (A) 51/47/45/42/- 53/49/45/42/-
Dimension (WXHXD) inch 30 1/3X11 1/7X8 30 1/3X11 1/7X8
Dimension of Carton Box (LXWXH) inch 33 2/9X13 1/2X10 2/7 33 2/9X13 1/2X10 2/7
Dimension of Package (LXWXH) inch 33 1/3X13 4/7X10 6/7 33 1/3X13 4/7X10 6/7
Net Weight lb 19 19
Gross Weight lb 23 23


Technical Information
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The above data is subject to change without notice. Please refer to the nameplate of the unit.
Outdoor
Unit
Model of Outdoor Unit MRM09Y1J MRM12Y1J
Product Code CB146W0431_L13396 CB146W0451_L13396
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR
CO., LTD
ZHUHAI LANDA COMPRESSOR
CO., LTD
Compressor Model QXA-A091ZE190 QXA-A091ZE190
Compressor Oil FVC68D FVC68D
Compressor Type Rotary Rotary
L.R.A. A / /
Compressor RLA A 6 6
Compressor Power Input W 980 980
Overload Protector 1NT11L-6233 1NT11L-6233
Throttling Method Electron expansion valve Electron expansion valve
Operation temp ºF 61~86 61~86
Ambient temp (cooling) ºF 64~113 64~113
Ambient temp (heating) ºF 5~75 5~75
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ2/7 Φ2/7
Rows-fin Gap inch 2-1/18 2-1/18
Coil Length (LXDXW) inch 29 8/11X1X19 8/17 29 8/11X1X19 8/17
Fan Motor Speed rpm 900 900
Output of Fan Motor W 30 30
Fan Motor RLA A 0.17 0.17
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM 1059 1059
Fan Type Axial-flow Axial-flow
Fan Diameter inch Φ15 10/13 Φ15 10/13
Defrosting Method Auto Defrosting Auto Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IP24 IP24
Design Pressure(High) PSIG 550 550
Design Pressure(Low) PSIG 240 240
Sound Pressure Level (H/M/L) dB (A) 53/-/- 55/-/-
Sound Power Level (H/M/L) dB (A) 63/-/- 65/-/-
Dimension (WXHXD) inch 33 2/5X21 1/4X12 3/5 33 2/5X21 1/4X12 3/5
Dimension of Carton Box (LXWXH) inch 34 4/7X14 1/6X22 5/6 34 4/7X14 1/6X22 5/6
Dimension of Package (LXWXH) inch 34 2/3X14 2/7X23 3/7 34 2/3X14 2/7X23 3/7
Net Weight lb 68 68
Gross Weight lb 77 77
Refrigerant R410A R410A
Refrigerant Charge oz 35.28 35.28
Connecti
on Pipe
Length ft 24.6 24.6
Gas Additional Charge oz/ft. 0.21 0.21
Outer Diameter Liquid Pipe inch Φ1/4 Φ1/4
Outer Diameter Gas Pipe inch Φ3/8 Φ3/8
Max Distance Height ft 32.8 32.8
Max Distance Length ft 49.2 49.2

Technical Information
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Cooling Heating
0
1
2
3
4
5
6
7
8
9
10
0 20 40 60 80 100 120
Condition
Indoor:DB 80°F
WB67 °F
Indoor air flow: Super High
Pipe length:24.6ft
0
1
2
3
4
5
6
7
8
0 20 40 60 80 100 120
Condition
Indoor:DB 70°F
Indoor air flow: Super High
Pipe length:24.6ft
Current(A)
Current(A)
Compressor Frequency(Hz) Compressor Frequency(Hz)
WB60 °F
Heating
Cooling
50
60
70
80
90
100
110
Capacity ratio(%)
Condition
Indoor air flow: Super High
Pipe length:
24.6ft
Outdoor temp. (°F)
0
20
40
60
80
100
120
510152025 3035404550
Capacity ratio(%)
Condition
Indoor air flow: Super High
Pipe length:
24.6ft
Outdoor temp. (°F)
Indoor:DB 70°F
Indoor:DB 80°F
WB67 °F
WB60 °F
90 95 100 105 110 115

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Technical Information
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Rated cooling
condition(oF)
(DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe
temperature of heat
exchanger
Fan speed of
indoor unit
Fan speed of
outdoor unit
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (oF) T2 (oF)
80/67 95/–
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MRM09Y1J 0.8~1.1
54 to 57 106 to 109 Super High High 48
MWM12Y1J
MRM12Y1J 50 to 54 109 to 113 Super High High 77
Rated heating
condition(oF)
(DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe
temperature of heat
exchanger
Fan speed of
indoor unit
Fan speed of
outdoor unit
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (oF) T2 (oF)
70/60 47/43
MWM09Y1J
MRM09Y1J 37~38
98 to 100 36 to 39 Super High High 54
MWM12Y1J
MRM12Y1J 107 to 111 32 to 37 Super High High 78
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T1: Inlet and outlet pipe temperature of evaporator
T2: Inlet and outlet pipe temperature of condenser
P: Pressure at the side of big valve
Connection pipe length: 24.6ft.
Cooling:
Heating:
Indoor side noise when blowing Outdoor side noise when blowing
60 60
60 80 100
50
50
40
40
40
30
30
20
20
20
10
0
0
Indoor Fan Motor Rotating Speed
Noice/dB(A) Noice/dB(A)
low Middle High Super High
Compressor frequency/Hz
09K 12K 09K 12K
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Unit: inch
5
2 3/5
21 4/7
30 1/3 8
11 1/7
3 5/7
3 2/3
Φ2 1/6 Φ2 1/6
1 5/8
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Unit: inch
30 10 1/8
12 3/5
11 2/3
33 2/5
21 1/4
21 1/4

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Indoor unit Outdoor unit
COOLING
HEATING
4-Way valve
Discharge
Suction
Heat
exchanger
(evaporator) Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Accumlator
Compressor
Strainer StrainerCapillary
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Refrigerant pipe diameter
Liquid :1/4" Gas : 3/8"

Technical Information
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Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN Green CAP Jumper cap
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
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 Technical Information
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5
6
7
8
9
10
11
NO. Name
1 Fuse
2 Live wire
3 Communication wire
4 Display interface
5 Jumper cap
6 Up and down swing
7Ambient temperature
sensor
8 Temperature sensor
9 PG feedback
10 PG motor
11 Neutral wire
GRJ836-A4 V1.3
2013/3/18/13
U13

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Technical Information
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NO. Name NO. Name NO. Name
1 Compressor output port 6 Port of power neutral wire 11 Port of AC fan motor
2 Overload port 7 Live wire 12 Port of DC fan motor
3 Temperature sensor port 8 Port of compressor electric heating belt 13 Port of electronic expansion valve
4 Communication wire port 9 Port of compressor electric heating belt / /
5 Earthing wire port 10 Port of AC fan motor / /
GRJW819-A3 V1.2 2013/06/25/12

 Technical Information
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MODE:Press to select operation mode (AUTO/COOL/DRY/FAN/HEAT).
FAN AUTO:Press to set fan speed.
TIMER ON:Press it to set auto-on timer.
TIMER OFF:Press it to set auto-off timer.
CLOCK:Press it set clock.
TEMP
TURBO
LIGHT:Press it to turn on/off the light.
1
6
7
5
3
2
4
11
10
SLEEP
14
9
12
13
15
3
9
10
13
12
5
4
11
8
7
21
6
8
SENSOR
AIR SWEEP:Press it set swing angle.
EXTEND
15
14
START / STOP:Press to start or stop operation.
:Press to decrease temperature setting.
:Press to increase temperature setting.
16
1
718 19 20 21
22
23
24
27 26
25
MODE icon:If MODE button is pressed, current operation mode icon (AUTO),
18
is displayed when pressing the AIR SWEEP button.Press this button
TEMP icon:Pressing TEMP button, (set temperature), (indoor ambient
temperature),
(outdoor ambient temperature) and blank is displayed circularly.
SLEEP icon :
again to clear the display.
is displayed by pressing the SLEEP button. Press this button
19
icon:
AIR SWEEP
again to clear the display.
16
17
LOCK icon:
Press them again to clear the display.
is displayed by pressing “ ” and “ ” buttons simultaneously.
LIGHT icon:
again to clear the display.
is displayed by pressing the LIGHT button. Press LIGHT button
21
20
SET TIME display:After pressing TIMER button, ON or OFF will blink.This area will
show the set time.
TURBO icon:
again to clear the display.
DIGITAL display:This area will show the set temperature.
SENSOR icon:
FAN SPEED display:Press FAN button to select the desired fan speed setting
(AUTO-Low-Med-High).Your selection will be displayed in the LCD windows,
except the AUTO fan speed.
EXTEND icon: is displayed when pressing the EXTEND button. Press this
button again to clear the display.
button again to clear the display.
is displayed when pressing the SENSOR button. Press this
is displayed when pressing the TURBO button.Press this button
22
23
24
26
25
27
(COOL), (DRY), (FAN) or (HEAT)(only for heat pump models) will show.
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Press this button to turn on the unit .Press this button again to turn off the unit.
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Press this button to decrease set temperature. Hold it down for 2 seconds or more to rapidly decrease set temperature. In AUTO mode,
set temperature is not adjustable.
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Press this button to increase set temperature. Hold it down for 2 seconds or more to rapidly increase set temperature. In AUTO mode, set
temperature is not adjustable.
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This button is used for setting Fan Speed in the sequence that goes from AUTO, , , to , then back to Auto.
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Each time you press this button, a mode is selected in a sequence that goes from AUTO,COOL,DRY, FAN,and HEAT , as the following:
After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not be displayed on the LCD, and the unit will
automatically select the suitable operationn mode in accordance with the room temperature to make indoor room comfortable.
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Press this button to turn on SENSOR(SAVE) function. Saves room ambient temperature and automatically adjusts maintaining that
room ambient until pressed again which cancels the SENSOR(SAVE) function.
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Pressing CLOCK button, blinks. Within 5 seconds, pressing + or - button adjusts the present time. Holding down either button above 2
seconds increases or decreases the time by 1 minute every 0.5 second and then by 10 minutes every 0.5 second. During
blinking after setting, press CLOCK button again to confirm the setting, and then will be constantly displayed.
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Press this button to initiate the auto-ON timer. To cancel the auto-timer program, simply press this button again.
After pressing this button, disappears and " ON " blinks. 00:00 is displayed for ON time setting. Within 5 seconds, press or button
to adjust the time value. Every press of either button changes the time setting by 1 minute. Holding down either button rapidly changes
the time setting by 1 minute and then 10 minutes. Within 5 seconds after setting, press TIMER ON button to confirm.
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Press this button to set up & down swing angle, which circularly changes as below:
This remote controller is universal. If any command , or is sent out, the unit will carry out the command as . indicates the
guide louver swings as:
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Pressing EXTEND button in COOL or DRY mode, the icon is displayed and the indoor fan will continue operation for 10 minutes in
order to dry the indoor unit even though you have turned off the unit.
After energization, EXTEND OFF is defaulted. EXTEND is not available in AUTO, FAN or HEAT mode.
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By pressing this button you can display th e indoor setting temperature or indoor ambient temperature.When the indoor unit is first
powered on it will display the setting temperature, if the temperature's display status is changed from other status to" ",displays the
ambient temperature, 5s later or within 5s, it receives other remote control signal that will return to display the setting temperature. if the
users haven't set up the temperature displaying status,that will display the setting temperature.(This function is not applicable
for some models).
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Press this button to initiate the auto-off timer. To cancel the auto-timer program, simply press the button again.TIMER OFF setting is the
same as TIMER ON.
AUTO COOL DRY FAN HEAT
Auto
Low speed Medium speed High speed
Note: Only for models with heating function.
(horizontal louvers
stops at current position)
no display
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 Technical Information
6HUYLFH0DQXDO
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Press this button to activate / deactivate the Turbo function which enables the unit to reach the preset temperature in the shortest time. In
COOL mode, the unit will blow strong cooling air at super high fan speed. In HEAT mode, the unit will blow strong heating air
at super high fan speed. (This function is not applicable for some models).
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Press this button to go into the SLEEP operation mode. Press it again to cancel this function. This function is available in COOL or DRY
mode to maintain the most comfortable temperature for you.
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Press LIGHT button to turn on the display's light and press this button again to turn off the display's light. If the light is turned on, is
displayed. If the light is tunrned off, disappears.
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Press " " and " " buttons simultaneously to lock or unlock the keypad. If the remote controller is locked, is displayed. In this
case, pressing any button, blinks three times.
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Allows you to toggle between Fahrenheit and Celsius. When the unit is OFF, press "MODE"and " " buttons simultaneously to switch
between °C and °F .
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● During operation, point the remote control signal sender at the receiving window
on indoor unit.
● The distance between signal sender and receiving window should be no more than
8m, and there should be no obstacles between them.
● Signal may be interfered easily in the room where there is fluorescent lamp or
wireless telephone; remote controller should be close to indoor unit during operation.
● Replace new batteries of the same model when replacement is required.
● When you don’t use remote controller for a long time, please take out the batteries.
● If the display on remote controller is fuzzy or there’s no display, please replace
batteries.
1.Press the back side of remote controller marked with“ ”as shown in the fig, and then push out the cover
of battery box along the arrow direction.
2. Replace two 7# (AAA 1.5V) dry batteries, and make sure the position of “+” polar and “-“ polar are correct.
3. Reinstall the cover of battery box.
Sketch map for
replacing batteries

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Technical Information
6HUYLFH0DQXDO
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(1)Cooling Mode
1. When room temp-set temp ≤-3.6°F , cooling will stop;
Outdoor fan will stop later and indoor fan will operate at set
speed;
2. When room temp –set temp ˚ -3.6°F, if such situation
continues for a period of time, cooling operation will be
started. In that case, indoor fan, outdoor fan and
compressor will operate and the indoor fan will operate at
set speed.
* In this mode, fan and swing motor will operate at set status
and the temp range setting is 61~86°F.
* If there is malfunction of outdoor unit or the unit stops for
protection, the indoor unit will keep its operation status but the
error will be displayed.
(2)Dry Mode
1. In this mode, the fan motor runs at low fan speed while swing
works according to setting state. The range of setting temperature
is 61~86°F.
2. When outdoor unit has malfunction or stopped for protection,
the indoor fan will keep the original running state and the error will
be displayed.
(3)Fan Mode
1. In this mode, the indoor fan may run at high, medium, low and
automatic speed. The compressor, outdoor fan and 4-way valve all
stop running.
2. In this mode, the range of setting temperature is 61~86°F.
(4)Heat Mode
1.Heating mode
When setting temperature-indoor temperature≤ 29.3°F.the unit will
stop heating. Both outdoor fan and indoor fan will stop later.
When setting temperature-indoor temperature>29.3°F and it lasts
for a certain period, the unit will start heating. In that case, indoor
fan, outdoor fan and compressor will start running. The indoor fan
works according to the anti-cold air.
* In this mode, the range of setting temperature is 61~86°F.
2.Protection function: in heating mode, when the compressor stops
as a result of malfunction, the indoor fan blows residual heat.
3.Defrosting control: when the defrosting signal is revived,defrosting
C
B
e
mark H1 will be shown. The e-heater and indoor fan stop.
*Anti-cold air function
The rotational speed of indoor electromotor is decided based on
the indoor pipe temperature. The indoor fan can run at low speed
or stop running. This function will terminate after the unit runs for
3min or the pipe temperature reached certain value.
During heating, if the indoor pipe temperature is lower than certain
value.The running speed of indoor fan will decrease automatically
base on the pipe temperature and ensure that the outlet air is hot.
During heating, when the stopping condition for the compressor is
reached,the compressor and the outdoor fan motor stop running
fan will stop after running for 60s at setting speed.
In this mode, the system selects the operation mode (cooling and
fan) automatically according to the ambient temperature. The
display shows the actual operation mode and setting temperature.
function is the same as that of other modes.
1. When T
2. for cooling only unit: when Tamb.
mode.
indoor amb.
enter auto mode and run in automatic fan mode. If the other mode
changes to auto mode, the previous operation mode will remain.
(6)Auto fan speed Mode
In auto fan mode, the rotational speed of the fan for indoor unit
is decided by the differential temperature between ambient
temperature and set temperature. In dry mode, the automatic fan
speed is forced to be low.
C
B
Cooling
operation
Cooling
operation
With compressor capacity supplied
With no compressor capacity supplied
type Mode Turbo
High
fan
speed
Medium
fan
speed
fan
speed
1
during cooling
during heating
2
during cooling
during heating

 Technical Information
6HUYLFH0DQXDO
and D. there are 7 states for the
e timer function is set in the last control before it is de-energized, the system
last control and the setting time is reached before the unit is de-energized, the unit will run according to the previous running mode after
it is energized again. But the timer function will terminate. The clock will not be memorized.
In cooling and heating mode (not available in auto, dehumidify, fan mode), press the Turbo button, the fan speed displayed super high
speed in the remote controller and the indoor fan rotates at super high speed.
L
A
B
C
D
Sleeping mode is available only in cooling and heating modes;
Cooling mode: at the base of initial set temperature by remote controller, the set temperature will increase automatically according to
people’s coziness within several hours after setting sleep function.
Heating mode: at the base of initial set temperature by remote controller, the set temperature will decrease automatically according to
people’s coziness within several hours after setting sleep function.
(12)Health Function
When the indoor fan motor is running, the Health function is set by pressing remote controller (If there is no Health button on the remote
controller, the health function opening is defaulted).
(13)I Feel Function
If the remote controller receives the I Feel order, the controller will work at the ambient temperature value which is sent by remote
controller (Except the defrosting and anti-cool wind, which still adopts the sampling value of AC itself ambient temperature sensor),
the remote controller will send ambient temperature value to controller every 10mins. After 11mins, if the controller hasn’t received the
ambient temperature value from the remote controller for long time, then it will run according to the current ambient temperature of AC.
If the function has not been set, the ambient temperature will adopt the sensor sampling value of AC itself. If power off happens, this
function will not be memorized.
Troubleshooting of Temperature Sensor
(1) Indoor Temperature Sensor


Technical Information
6HUYLFH0DQXDO
FCG 3
FCG 2
FCG 1
TCG1
TCG2
TCG3
88
64
48
240
360
180
TCG 1sec TCG 2sec TCG 3sec Time
Frequency
FCG3
FCG2
FCG1
Detect malfunctions of temperature sensor any time.
(2) Indoor Pipe Temperature Sensor
detect the temperature sensor malfunction. In other times, the temperature sensor malfunction will be detected.
(3) Protection of Temperature Sensor
1. When short-circuit occurs to the temperature sensor for 30s:
The temperature sensor overheats. In this case, the complete unit will stop for protection. At the same time, the temperature protection
and temperature sensor malfunction will be shown.
2. When break-circuit occurs to the temperature sensor for 30s:
The unit will stop and the temperature sensor malfunction will be displayed.
Frequency Control
Frequency Initial Setting<Outline>When starting the compressor, or when conditions are varied due to the change of the room, the
frequency must be initialized accordingto the D value of the indoor unit and the Q value of the indoor unit.Q value: Indoor unit output
D Signal)
1.P control Calculate D value in each sampling time (20 seconds), and adjust the frequency according to its difference from the
frequency previously calculated.
D value.
When the D value is small lower the frequency.
When the D value is large increase the frequency.
3.Frequency management when other controls are functioningWhen frequency is drooping;Frequency management is carried out only
when the frequency droops.For limiting lower limitFrequency management is carried out only when the frequency rises.
4.Upper and lower limit of frequency by PI controlThe frequency upper and lower limits are set depending on indoor unit.When low
noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit, theupper limit
frequency must be lowered than the usual setting.
3-minutes Standby
Prohibit to turn ON the compressor for 3 minutes after turning it off.(except when defrosting)
Compressor Protection Function
When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used
when defrosting.)
Discharge Pipe Control
Outline
The discharge pipe temperature is used as the compressor’s internal temperature. If the discharge pipe temperature rises above a
certain level, the operating frequency upper limit is set to keep this temperature from going up further.
Detail
Divide the Zone
Heat exchanger
thermistor
temperature
Stop zone
Drooping zone
Keep zone
Up zone
Reset zone