5-1 Dipswitch Functions and Factory Settings ... 127 5-1-1 Outdoor Unit Switch Functions and Factory Settings ... 127 5-1-2 Indoor Unit Switch Functions and Factory Settings ... 131 5-1-3 Remote Controller Switch Functions and Factory Settings... 133 5-1-4 BC Controller Switch Settings... 134 5-2 Outdoor Unit Control ... 135 5-2-1 Overview ... 135 5-2-2 Rotation Control ... 135 5-2-3 Initial Control ... 135 5-2-4 Startup Control... 135 5-2-5 Refrigerant Bypass Control... 136 5-2-6 Frequency Control ... 138 5-2-7 Defrost Operation Control ... 139 5-2-8 Continuous heating mode control ... 141 5-2-9 Refrigerant Recovery Control ... 143 5-2-10 Outdoor Unit Fan Control... 143 5-2-11 Evaporation Temperature Control (Expansion Valves <LEV5a and LEV5b>)... 144 5-2-12 Control at Initial Startup ... 144 5-2-13 Emergency Operation Mode ... 146 5-2-14 Unit Control Scheme... 148 5-2-15 Refrigerant Circuits and Refrigerant Cycle Diagrams ... 149 5-2-16 Operation Mode ... 150 5-2-17 Demand Control... 151 5-2-18 Control of IH energization without the compressor in operation (not applicable to the EP500 model) ...151 5-2-19 Compressor heater control (EP500 model) ... 151 5-3 BC Controller Control... 152 5-4 Operation Flowcharts ... 153 5-4-1 Operation Sequence Flowchart ... 153 5-4-2 Actions Performed in Different Modes ... 156
5 Control
5 Control
5-1 Dipswitch Functions and Factory Settings
5-1-1 Outdoor Unit Switch Functions and Factory Settings
(1) Control board
1) Unless otherwise specified, leave the switch to OFF where indicated by "-" or where the cells are blank, which may be set to OFF for a reason.
2) A: Only the switch on OC needs to be set for the setting to be effective.
B: The switches on both the OC and OS need to be set to the same seeing for the setting to be effective.
C: The switches on both the OC and OS need to be set.
3) When set to the performance-priority mode, the low-noise mode will be terminated, and the units will operate in the normal mode.
Cooling: Ambient temperature or the high pressure is high.
Heating: When the outside air temperature is low or when the low pressure is low. Refer to the following page(s). [2-4-7 Var- ious Control Methods Using the Signal Input/Output Connector on Outdoor Unit](page 28)
4) Operation noise is reduced by controlling the compressor frequencies and the rotation speed of the outdoor unit fans.
CN3D needs to be set. Refer to the following page(s). [2-4-7 Various Control Methods Using the Signal Input/Output Connec- tor on Outdoor Unit](page 28)
Switch Function Function according to switch setting Switch setting tim- ing
Units that require switch setting
(Note 2)
OFF ON
SWU 1-2 Unit address setting Set to 00 or 51-100 with the dial switch Before power on C
SW5
1 Centralized control switch
Without connec- tion to the central- ized controller
With connection to the centralized con-
troller Before power on B
2 Deletion of connec-
tion information Normal control Deletion Before power on A
3 -
Preset before shipment
-
4 - -
5 - -
6 - -
7 - -
8 - -
SW6
1 - - - - -
2 - - - - -
3 - - - - -
4 Model setting (out- door unit/high static pressure setting)
Normal static pres-
sure High static pres-
sure Before power on C
5 Model setting (out- door unit/high static
pressure setting) High (60 Pa) High (30 Pa) Before power on C
6 - - - - -
7 Performance-priority/
low-noise mode set- ting
Performance-pri-
ority mode (Note 3) Quiet-priority mode Anytime after power on
A
8 Low-noise mode/step
demand switching Low-noise mode
(Note 4) Step demand mode Before power on C
9 - - - - -
10
Self-diagnosis moni- tor display / SW4 function setting mode switching
Self-diagnosis
monitor display SW4 function set-
ting mode Anytime after power on
C
1) To change the settings, set SW6-10 to ON, set SW4, and press and hold SWP01 for 2 seconds or longer (OFF↔ON).
LED3 will light up when the switch setting is ON, and lights off when OFF.
Use the LED3 display to confirm that the settings are properly made.
The settings will need to be set again when the control board is replaced. Write down the settings on the electrical wiring drawing label.
2) A: OC: Only the switch on OC needs to be set for the setting to be effective.
B: OC: The switches on both the OC and OS need to be set to the same seeing for the setting to be effective.
C: OC: The switches on both the OC and OS need to be set.
D: OC: The switch on either the OC or OS needs to be set.
3) For details, refer to the following page(s).[5-2-7 Defrost Operation Control](page 139) 4) The table below shows how the target evaporation temperature is set with SW4 (982).
5) Unless otherwise specified, leave the switch to OFF where indicated by "-" or where the cells are blank, which may be set to OFF for a reason.
6) The settings that are configured with SW4 (SW6-10: ON) will automatically be stored on the indoor units that support the new function*. The stored settings will automatically be restored when the outdoor unit control board is replaced.
If none of the connected indoor units supports the new function, no configuration information will be saved. If this is the case, manually record the settings configuration on the control box panel.
*The new function is supported on most units that are manufactured in December of 2012 and later. Depending on the model, this function may be added on later date. Ask your dealer for further details.
Switch Function
Function according to switch setting
Switch setting timing
Units that require
switch setting (Note 2) OFF (LED3 Unlit) ON (LED3 Lit)
SW4SW6-10:
OFF
1-101:ON, 0:OFF Self-diagnosis/operation monitor
Refer to the following page(s). [9 LED Status Indicators on the Outdoor Unit Circuit
Board](page 385) Anytime after power on C
SW41-10 [0:OFF, 1:ON]
(Note 1) SW6-10:ON
No.769 1000000011 Test run mode: ON/OFF Stops all ICs Sends a test-run sig-
nal to all IC Anytime after power on A
No.832 0000001011 Cumulative compressor
operation time deletion Retained Cleared Anytime after power on (OFF→ON) C No.848 0000101011 Continuous heating cycle
function Disabled Enabled After being energized and while the com-
pressor is stopped A
No.896 0000000111 Clearance of error history
OC Retained (IC/OC) Deleted (IC/OC)
Anytime after power on (OFF→ON) C OS Retained (OS) Deleted (OS)
No.897 1000000111 High sensible heat opera-
tion setting Normal control High sensible heat
operation mode Before power on A
No.912 0000100111 Pump down function Normal control Pump down opera-
tion After being energized and while the com-
pressor is stopped A
No.913 1000100111 Forced defrost (Note 3) Normal control Forced defrost starts 10 minutes after the completion of de- frost operation (OFF→ON) or 10 minutes after compressor start-up (OFF→ON) D
No.915 1100100111 Defrost start temperature (Note 3)
(E)P200, (E)P250:
-10°C [14°F]
(E)P300 - (E)P500:
-8°C [18°F]
-5°C [23°F] Anytime after power on B
No.916 0010100111 Defrost end temperature
(Note 3) 7°C [45°F] 12°C [54°F] Anytime after power on B
No.918 0110100111 Changes the defrost timer
setting (Note 3) 50 minutes 90 minutes Anytime after power on (OFF→ON) B
No.921 1001100111 Temperature unit display °C °F Anytime after power on C
No.922 0101100111 Refrigerant amount adjust-
ment Normal control Refrigerant amount
adjust mode
When the compressor is in operation (ex- cept during initial startup/becomes inef- fective 90 minutes after compressor started up.)
A
No.932 0010010111 Heating backup Disabled Enabled Anytime after power on A
No.933 1010010111 Snow sensor setting
Effective only when TH7 ≤ 5 is true or the snow sensor contact input is on.
Effective when TH7
≤ 5 is true Anytime after power on C
No.934 0110010111 Snow sensor setting Continuous fan op- eration (FAN=50%)
Refrigerant recov- ery/Evacuation (two- way valve/LEV1 open)
Anytime after power on C
No.935 1110010111 High heating power (at low
outside temperature) Effective Ineffective Anytime after power on A
No.972 0011001111 Automatic cooling/heating mode (IC with the smallest
address) Normal control Automatic cooling/
heating mode Before power on A
No.982 0110101111 Target evaporation tem-
perature setting Refer to Note 4). Anytime after power on A
SW4(982) OFF → ON → OFF → ON → OFF → ON
Target evaporating
temperature 0
[32 ] [32 ] [25 ] [32 ] -2
[28 ]
0 -4 0
[21 ] -6
5 Control (2) INV board
1) PURY-P200, P250, P300, P350, P400, P450, P500YLM-A(1) PURY-EP200, EP250, EP300, EP350, EP400, EP450YLM-A
CN6 short-circuit connector is mated with the mating connector.
Leave the short-circuit connector on the mating connector during normal operation to enable error detection and protect the equipment from damage.
2) PURY-EP500YLM-A
The default settings for all switches are OFF. Unless otherwise specified, leave the switch that are indicated by "-" to OFF, which may be set to OFF for a reason.
Leave SW001 to OFF during normal operation. Setting this switch to ON disables the error detection function and may result in equipment damage.
Connector Function
Function according to connec-
tor Setting timing
Enabled Disabled Enabled Disabled
CN6 short- circuit con-
nector
Enabling/disabling the following error detection functions;
ACCT sensor failure (5301 Detail No. 115) ACCT sensor circuit failure (5301 Detail No.117)
IPM open/ACCT erroneous wiring (5301 Detail No. 119)
Detection of ACCT erroneous wiring (5301 Detail No.120)
Error detec-
tion enabled Error detec- tion disable (No load op- eration is pos- sible.)
Anytime after power on
Switch Function
Function according to switch
setting Switch setting timing
Enabled Disabled SW001
1
Detects or ignores the following errors ACCT/DCCT sensor fault (5301 Detail No. 115 and 116)
ACCT/DCCT sensor circuit fault (5301 Detail No. 117 and 118)
Open-circuited IPM/Loose CNCT2 connector (5301 Detail No. 119) Detection of faulty wiring (5301 Detail No. 120)
Error detec-
tion enabled Error detec- tion disable (No load op- eration is pos- sible.)
Anytime after power on
2 - - - -
(3) Fan board (Control box side, Fan box side)
Only the addresses are preset before shipment (All other switches are set to OFF.) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
Set SW1-5 on the control-box-side fan board to ON (address = 5). Set SW1-6 on the fan-box-side fan board to ON (address
= 6).
Leave SW1-1 to OFF during normal operation. Setting this switch to ON will disable the error detection function and may result in equipment damage.
Switch Function
Function according to switch
setting Switch setting timing
OFF ON
SW1 1 Enabling/Disabling no-load opera- tionNo-load operation will continue for approximately 30 seconds, and then the unit will come to an ab- normal stop. For details, refer to the following page(s). [8-10-9 Checking the Fan Inverter for Damage at No Load](page 342)
No-load oper-
ation disabled No-load oper-
ation enabled Anytime after power on
2 - - - -
3 - - - -
4 - - - -
5 Address setting (Control box side) 0 5 Before power on
6 Address setting (Fan box side) 0 6 Before power on
5 Control
5-1-2 Indoor Unit Switch Functions and Factory Settings
(1) Dipswitches 1) SW1,3
2) SW2
The setting timing for SW2 is before power is turned on.
For how to read the SW settings, refer to the following page(s). [9-1-1 How to Read the LED](page 385)
SW3-1
OFF
OFF OFF
ON ON
ON OFF ON OFF ON OFF ON OFF ON
Very Low Low
Preset speed Preset speed
Preset speed Stop
Stop Stop Stop
Switch setting
SW1-7 SW1-8 Heating Cooling Cooling-only/heat pump Heat pump
Cooling-only
Heat pump Fan speed during Thermo-OFF
Note 2. If both SW1-7 and SW1-8 are set to ON, the fan remains stopped during heating Thermo-OFF.
To prevent incorrect temperature detection due to a build-up of warm air around the indoor unit, use the built-in temperature sensor on the remote controller (SW1-1) instead of the one on the indoor unit inlet thermistor.
Note 3. By setting SW3-1, SW1-7, and SW1-8 to a certain configuration, the fan can be set to remain stopped during cooling Thermo-OFF. See the table below for details.
Switch Function Function according to switch setting
OFF ON
Switch setting timing
Notes
SW1
SW3 1 2 3 4 5 6 7
8 9 10
9 10 1 2 3 4 5 6 7 8
Room temperature detection position Clogged filter detection Filter check reminder time setting Outside air intake Remote display option Humidifier control
Self-recovery after power failure Fan speed setting for Heating Thermo-OFF
Power source start-stop Unit model selection Louver
Vane
Vane swing function -
Vane angle limit setting for cooling operation Initial vane position
Heating 4°C [7.2°F] up Automatic LEV value conversion function
Indoor unit inlet
100h Disabled Fan output
2500h Enabled Thermo-ON signal Built-in sensor on the remote controller
Available
During heating operation
According to the SW1-7 setting
Heat pump
Always on while in the heating mode Fan speed setting for
Heating Thermo-OFF Very Low Low
Preset speed
Cooling only
Enabled Enabled Disabled
Disabled Enabled
Enabled
Not available Available Not available Available Not available
Not available
Available Not available
Available
Not available Available
- -
- - -
Downblow B,C Horizontal
While the unit is stopped (Remote controller OFF)
Always set to OFF on PKFY-VBM model units Set to ON (built-in sensor on the remote controller) on All Fresh (PEFY-VMH-F) model units
Applicable to All Fresh model units (PEFY-VMH-F) only
Applicable to All Fresh model units (PEFY-VMH-F) only
Always set to OFF on PKFY-VBM model units
PLFY-VLMD model only
Set to OFF on floor-standing (PFFY) type units
Always set to Downblow B or C on PKFY-VBM model units
Disabled
SHm setting 2°C [3.6°F]
10°C [18°F]
5°C [9°F]
15°C [27°F]
The setting depends on the model and type.
The setting depends on the model and type.
SCm setting
Disabled Forced heating operation
at OA temp of 5 C or below
- - -
Note 1. Settings in the shaded areas are factory settings.(Refer to the table below for the factory setting of the switches whose factory settings are not indicated by the shaded cells.)
P20 4 P15
3 P25
5 P32
6 P40
8 P50
10 P63
13 P71
14 P80
16 P100
20 P125
25 P200
40 P250
50 P140
28 Model
Capacity (model) code settingSW2 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF 1 2 3 4 5 6
ONOFF
(2) Address switch
Actual indoor unit address setting varies in different systems. Refer to the installation manual for the outdoor unit for details on how to make the address setting.
Each address is set with a combination of the settings for the 10's digit and 1's digit.
(Example)
When setting the address to "3", set the 1's digit to 3, and the 10's digit to 0.
When setting the address to "25", set the 1's digit to 5, and the 10's digit to 2.
5 Control
5-1-3 Remote Controller Switch Functions and Factory Settings
(1) MA simple remote controller (PAC-YT52CRA)
There are switches on the back of the top case. Remote controller Main/Sub and other function settings are performed using these switches. Ordinarily, only change the Main/Sub setting of SW1. (The factory settings are ON for SW1, 2, and 3 and OFF for SW4.)
The MA remote controllers (PAR-31MAA and PAR-21MAA) do not have the switches listed above. Refer to the installation manual for the function setting.
ON
OFF 1 2 3 4
Comment Switch setting timing
Before power on Before power on Before power on Before power on OFF
ON SW contents Main
SW No.
1 Remote controller
Main/Sub setting Main Set one of the two remote controllers at one group to “ON”.
2 Temperature display
units setting Celsius When the temperature is displayed in [Fahrenheit], set to “OFF”.
3 Cooling/heating
display in AUTO mode Yes When you do not want to display “Cooling” and
“Heating” in the AUTO mode, set to “OFF”.
4 Indoor temperature
display Yes
Sub Fahrenheit
No
No When you want to display the indoor temperature, set to “ON”.
(2) ME remote controller (PAR-F27MEA)
Set the address of the remote controller with the rotary switch.
To set addresses, use a precision slotted screw driver [2.0 mm [0.08 in] (w)], and do not apply than 19.6N.
The use of any other tool or applying too much load may damage the switch.
5-1-4 BC Controller Switch Settings
Model setting
012345
8967 012
345 8967
01267345 01267345 89 89
10's digit 1's digit (left) (right) Remote controller unit
Rotary switch
Example: In case of address 108
Address setting range Setting method
Main remote controller 101-150 Add 100 to the smallest address of all the indoor units in the same group.
Sub remote controller 151-200 Add 150 to the smallest address of all the indoor units in the same group.
Setting of rotary switch Address No.
01-99*1 101-199 with the 100's digit automatically being set to 1*2
00 200
*1. At factory shipment, the rotary switch is set to 01.
*2. The address range that can be set with the ME remote controller is between 101 and 200. When the dials are set to a number between 01 and 99, the 100's digit is automatically set to [1]. When the dials are set to 00, the 100's digit is automatically set to [2].
Switch Function Function according to switch setting
Switch setting timing
OFF ON
SW4
1 Model setting R410A - Always leave this switch to OFF.
2 - 5 - - - -
6 No. of ports *1
*1. When a junction pipe kit was used to merge two ports to connect the indoor units with a total capacity of between P81 and P140, turn DIP SW4-6 to ON. When connecting a main and a sub BC controller, change the SW setting on only the main BC controller. (It is not necessary to change the SW setting on the sub BC controller. )
1 2 Before being energized
7, 8 - - - -
SW5
1 - 6 - - - -
7 Model setting Refer to the table below. Before being energized
8 Model setting Refer to the table below. Before being energized
SW5-8
OFF ON
SW5-7 OFF G1 type
ON GA1 (HA1) type GB1 (HB1) type
5 Control
5-2 Outdoor Unit Control
5-2-1 Overview
The outdoor units are designated as OC and OS in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).
The setting of outdoor unit can be verified by using the self-diagnosis switch (SW4).
The OC determines the operation mode and the control mode, and it also communicates with the indoor units.
The OS exercises autonomous distributed control (over defrost, error detection, and actuator control etc.) according to the operation/control mode signals that are sent from the OC.
5-2-2 Rotation Control
At the initial startup, outdoor units start up in the order of "OC and OS." When the cumulative operation time of the OC reaches two hours, the OS will start up before the OC at the next start up.
Startup sequence rotation is performed while all the indoor units are stopped. (Even after two hours of operation, startup se- quence rotation is not performed while the compressor is in operation.)
In a system with multiple outdoor units (OC and OS), when the integrated operation time of the unit in operation (either OC or OS) reaches one hour during a cooling operation at low outside temperature, that unit will stop and the other unit will go into operation.
For information about rotation control at initial startup, refer to the following page(s). [5-2-12 Control at Initial Startup](page
Performing startup sequence rotation does not change the basic operation of OC and OS. Only startup sequence is changed.144)
Startup sequence of the outdoor units can be checked with the self-diagnosis switch (SW4) on the OC.
5-2-3 Initial Control
When the power is turned on, the initial processing of the microcomputer is given top priority.
During the initial processing, control processing of the operation signal is suspended. (The control processing is resumed after the initial processing is completed. Initial processing involves data processing in the microcomputer and initial setting of each of the LEV opening. This process will take up to 5 minutes.)
During the initial processing, the LED monitor on the outdoor unit's control board displays S/W version → refrigerant type → Model and capacity → and communication address in turn every second.
5-2-4 Startup Control
The upper limit of frequency during the first 3 minutes of the operation is 50 Hz.
When the power is turned on, normal operation will start after the initial start-up mode (to be described later) has been com- pleted (with a restriction on the frequency).
In the Heating-Only or Heating-Main operation, the unit will not start when TH7 > 25°C. In the test run mode, the unit will start when TH7 > 25°C.
SW4 (SW6-10:OFF) Display
The unit is designated as the OC: "OC" appears on the display.
The unit is designated as OS: "OS" appears on the display.
For how to read the SW settings, refer to the following page(s). [9-1-1 How to Read the LED](page 385)
ON
1 2 3 4 5 6 7 8 9 10 OFF
SW4 (SW6-10:OFF) Display
OC→OS: "OC" and the "OC" address appear alternately on the display.
OS→OC: "OS" and the "OS" address appear alternately on the display.
For how to read the SW settings, refer to the following page(s). [9-1-1 How to Read the LED](page 385)
ON
1 2 3 4 5 6 7 8 9 10 OFF