Daikin V3 User manual

Medium Temperature
Variable Capacity
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V3 INVERTER
SCROLL
AIR COOLED
SPLIT COMMERCIAL
CONDENSING UNIT
TECHNICAL MANUAL
NO: T-CU19-JAN24-1

T-CU19-JAN24-1 Page II
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
This guideline is intended for users to ensure safe installation, operation, and maintenance of Daikin inverter condensing units. This
guideline is not intended to replace the system expertise available from the system manufacturers.
This equipment is a relatively complicated apparatus. During installation, operation, maintenance or service, individuals may be
exposed to certain components or conditions including, but not limited to: refrigerants, materials under pressure, rotating
components, and both high and low voltage. Each of these items has the potential, if misused or handled improperly, to cause
bodily injury or death. It is the obligation and responsibility of operating/service personnel to identify and recognize these
inherent hazards, protect themselves, and proceed safely in completing their tasks. Failure to comply with any of these
requirements could result in serious damage to the equipment and the property in which it is situated, as well as severe personal
injury or death to themselves and people at the site.
This document is intended for use by owner-authorized operating/service personnel. It is expected that these individuals possess
independent training that will enable them to perform their assigned tasks properly and safely. It is essential that, prior to
performing any task on this equipment, this individual shall have read and understood this document and any referenced mate-
rials. This individual shall also be familiar with and comply with all applicable governmental standards and regulations
pertaining to the task in question.
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to specific situations:
WARNING
Warning! Risk of serious injury or
death to person!
CAUTION
Caution! Danger which can lead to
serious damages!
NOTICE
Notice! Risk of damage to equipment!
NOTICE
Disposal requirement:
Your refrigeration product is marked with this symbol. This means that electrical and electronic products shall
not be mixed with unsorted household waste. Do not try to dismantle the system yourself: the dismantling of
the refrigeration system, treatment of the refrigerant, of oil and of other parts must be done by a qualified
installer in accordance with relevant local and national legislation. Refrigeration equipment must be treated
at a specialized treatment facility for re-use, recycling, and recovery.
By ensuring this product is disposed of correctly, you will help to prevent potential negative consequences for
the environment and human health. Please contact Daikin for more information.
Batteries must be removed from the controller and disposed of separately in accordance with relevant local and national
legislation.

T-CU19-JAN24-1 Page III
Contents
PRODUCT FEATURES .......................................................2
NOMENCLATURE.............................................................2
Figure 1: Product Nomenclature ...............................2
SPECIFICATIONS ..............................................................3
Table 1: Exploded View Indicator..............................3
Figure 2: Exploded View of LRMIFS0300AXY1;
LRMIFS0600AXY1 ......................................................3
Figure 3: Exploded View of LRMIFS0900AXY1...........4
Table 2: Unit Data .....................................................5
Table 3: Unit SEPR, Sound Data, Dimension and
Weight.......................................................................5
Table 4: Performance Data of LRMIFS0300AXY1
R448A/ R449A)..........................................................6
Table 5: Performance Data of LRMIFS0600AXY1
(R448A/ R449A) ........................................................7
Table 6: Performance Data of LRMIFS0900AXY1
(R448A/ R449A) ........................................................8
APPLICATION GUIDELINES...............................................9
CONDENSING UNIT SELECTION ..............................................9
Table 7: Compressor Speed Range ............................9
Table 8: Operating Limit ...........................................9
COMPRESSOR ....................................................................9
HEALTH AND SAFETY.......................................................9
GENERAL INFORMATION ......................................................9
INSTALLATION...............................................................10
UNIT LOCATION................................................................10
Figure 4: Positioning of Condensing Unit ................10
Figure 5: Air Circulation for Condenser ...................10
INSTALLATION CLEARANCES ................................................11
Figure 6: Installation Clearance ..............................11
FIELD PIPING....................................................................11
Figure 7: Piping layout for outdoor above indoor ...11
Figure 8: Piping layout for outdoor below indoor ...12
PRESSURE TESTING ...........................................................12
Table 9: Test Pressure .............................................12
EVACUATION AND CHARGING..............................................12
ELECTRICAL ...................................................................13
Table 10: Recommended wiring sizes .....................13
PHASE SEQUENCE FOR CORRECT COMPRESSION .....................13
WARNING WHEN TOUCHING UNIT WHEN OFF .....................13
EARTH LEAKAGE CURRENT..................................................13
COMMISSIONING..........................................................14
Figure 9: Access Point..............................................14
ACCESS TO CONTROLLER AND LCD DISPLAY...........................14
Table 11: Factory Default Setting............................14
USER TERMINAL INTERFACE –LCD DISPLAY...........................15
Figure 10: LCD Display.............................................15
Table 12: LCD Display Button Functions..................15
CONTROLLER HOME SCREEN...............................................15
PASSWORD FOR ACCESSIBILITY LEVEL....................................15
CHANGING SET POINT .......................................................16
REFRIGERANT SELECTION ...................................................16
SWITCH UNIT ON/OFF (BY CONTROLLER)............................16
COMPRESSOR MODEL SELECTION ........................................17
Table 13: List of Compressor in Controller ..............17
COMPRESSOR OPERATION..................................................17
Figure 11: Compressor Operating Zone ..................17
INVERTER COMPRESSOR START-UP: ......................................18
Figure 12: Compressor Startup Curve .....................18
PRESSURE DIFFERENTIAL DURING START-UP............................18
TIMES.............................................................................18
Figure 13: Times Control for Compressor Startup ...18
COMPRESSOR CONTROL.....................................................19
Figure 14: Proportional Control ..............................19
Figure 15: Proportional + Integral Control ..............19
AC FAN SPEED MODULATION .............................................19
Figure 16: Fan Control Curve...................................19
Table 14: Fan Settings for Ecodesign Data..............19
MECHANICAL SAFETY PRESSURE SWITCH...............................20
HIGH DISCHARGE TEMPERATURE MANAGEMENT....................20
Figure 17: Discharge Temperature Management...20
SYSTEM CHARGE ...........................................................21
PIPE SIZE SELECTION .....................................................21
Figure 18: Suction Pipe Layout for 1 outdoor to 2
indoors ....................................................................21
Table 15: Suction Pipe Size Selection.......................22
CONTROLLER SETTINGS.................................................22
Table 16: Controller Default Settings ......................22
ALARM SETTINGS..............................................................24
Table 17: List of Alarm Code ...................................24
Table 18: LCD Display - Alarm Status ......................25
Table 19: Details Error Code from Activation of
ALW25.....................................................................25
SERVICE AND MAINTENANCE........................................26
BACNET AND MODBUS PROTOCOL ...............................27
Figure 19: Location of Serial Port on Controller ......27
SOFTWARE UPDATE ......................................................27
Figure 20: pCO Smart Key .......................................27
APPENDIX .....................................................................27
Table 20: Tightening Torque ...................................27
Figure 21: Outline Drawing LRMIFS0300AXY1,
LRMIFS0600AXY1 ..............................................28
Figure 22: Outline Drawing LRMIFS0900AXY1 ........28
Figure 23: Wiring Diagram LRMIFS0300AXY1.........29
Figure 24: Wiring Diagram LRMIFS0600AXY1.........30
Figure 25: Wiring Diagram LRMIFS0900AXY1.........31

T-CU19-JAN24-1 Page 2
Product Features
Daikin inverter condensing unit adopt stepless inverter scroll technology with energy efficiency 20-30% higher in a flexible plug
and play package, for medium temperature refrigeration application.
Standard features for all medium temperature model:
•SCI hermetic high pressure dome BLDC scroll compressor and crankcase heater
•Compressor Drive (with EMI filter) integrates protection functions: short circuit, overcurrent, ground fault, over voltage and
under voltage, over temperature.
•Advanced programmable controller integrates the function of oil speed boost for oil return to compressor, discharge
superheat control, ample configuration of alarms.
•Capacity modulation based on fixed pressure set point (floating suction setpoint is available when exploiting serial
communication with evaporators)
•Vertical liquid receiver with stop valve and 3/8” NPT plug
•Fitted with brazed type liquid line drier and sight glass
•Oil separator and discharge line non returned valve
•External service valves
•Suction and discharge pressure transducers
•Suction, discharge, and ambient temperature sensors
•Low pressure switch (adjustable) –default: auto reset
•High pressure safety switch (manual reset cartridge type)
•Mains switch for isolation of incoming power supply
•Manual motor starter for isolation and protection on 3phase AC Drive
•Fuse protection for 1phase controller and fan motor
•LCD display
•Flexible pressure hoses
•IP rated enclosure
•Fan speed controller
•Acoustic insulation on compressor compartment
•Robust weatherproof housing
•BACnet and Modbus Protocol feature
•Approved refrigerants: R448A, R449A and R404A (Contact Daikin if performance data for R404A is required)
Nomenclature
Figure 1: Product Nomenclature
Model Name (Daikin)
Application
L: Refrigeration
Additional Features
F: Fan Speed Controller
Blank: Without Fan Speed Controller
Unit Category
R: Outdoor Unit
F: Indoor Unit
Compressor Type
MD: Medium Temperature Single Digital Scroll
MI: Medium Temperature InverterScroll
MT: MediumTemperature TwinDigital Scroll
MS: Medium Temperature Scroll
MY: Medium Temperature Rotary
LS: Low Temperature Scroll Liquid Injection
LV: Low Temperature Scroll Vapor Injection
LY: Low Temperature Rotary
Compressor Horse Power
0300: 3HP
2
R
3-4
MI
5
F
11
A
6
S
7-10
0300
1
L
13-14
Y1
Generation
A: 1st Generation
B: 2
nd
Generation
Refrigerant
S: R404A
Power
V1: 220~240V, 1Ph, 50Hz
Y1: 380~415V, 3Ph, 50Hz
12
X
Manufactuing Plant
X: DRM

T-CU19-JAN24-1 Page 3
Specifications
Table 1: Exploded View Indicator
Item
Description
1
COMPRESSOR
2
DRIVE
3
HEATER
4
LIQ. RECEIVER
5
OIL SEPARATOR
6
FAN PROPELLER
7
FAN MOTOR
8
FAN
9
FAN CAPACITOR
10
FAN GUARD
11
COMPRESSOR OIL
12
CONDENSER
13
ISOLATOR
14
ISOLATOR-N
15
ISOLATOR HANDLE
16
MCB
17
CONTROLLER
18
FAN SPEED CONTROLLER
19
DC CHOKE
20
CONTROL RELAY
21
CONTROL RELAY
22
CONTROL RELAY
23
REMOTE DISPLAY
24
CABLE REMOTE DISPLAY
25
PRESSURE SWITCH LOW
26
PRESSURE SWITCH HIGH
27
SENSOR PRESSURE SUCTION
28
SENSOR PRESSURE DISCHARGE/ VI
29
CABLE PRESSURE TRANSDUCER
30
SENSOR TEMPERATURE SUCTION/ VI
31
SENSOR TEMPERATURE DISCHARGE T
32
SENSOR TEMPERATURE AMBIENT
33
FUSE
34
VALVE SERVICE
35
VALVE DISCHARGE LINE
36
VALVE NON - RETURN
37
FILTER DRIER
38
SIGHT GLASS
39
GOMEX LOW PRESSURE
40
GOMEX OIL RETURN
41
BRACKET SERVICE VALVE
42
PANEL BASE
43
PANEL FAN
44
PANEL FAN TOP
45
PANEL LEFT
46
PILLAR LEFT-REAR
47
PANEL REAR
48
PILLAR FRONT RIGHT
49
PILLAR FRONT LEFT
50
PANEL RIGHT
51
PANEL FRONT
52
PANEL FRONT TOP
53
PANEL TOP
54
BRACKET FAN MOTOR
55
BRACKET ADAPTOR FAN MOTOR
56
BRACKET OIL SEP.
57
PARTITION FAN
58
BRACKET DRIVE
59
CONTROL BOX COVER DISPLAY
60
CONTROL BOX COVER
61
PANEL MIDDLE
62
BRACKET LIQUID PIPE
Figure 2: Exploded View of LRMIFS0300AXY1; LRMIFS0600AXY1

T-CU19-JAN24-1 Page 4
Figure 3: Exploded View of LRMIFS0900AXY1

T-CU19-JAN24-1 Page 5
Table 2: Unit Data
Casing
Model
Appl.
Compressor
Oil
Separator
Electrical Data
Unit Connections
Coil
Volume
Air
flow
Liquid
Receiver
Model
Displacement
Oil Charge
Compressor
Fan Motors
Liquid
Suction
(cm3/rev)
(L)
(L)
NC
MCC
No.
FLC
(A)
(inch)
(inch)
(L)
(m3/h)
(L)
3
LRMIFS0300AXY1
MT
AGK33FDAMTS
33.2
1.9
0.6
3.9
10.8
1
0.5
1/2"
5/8"
4.42
3350
6.2
LRMIFS0600AXY1
AGK66FDBMTS
66.0
2.3
0.6
7.0
17.5
1
0.9
1/2"
3/4"
6.89
4100
6.2
4
LRMIFS0900AXY1
AGK87FDCMTS
87.1
2.3
0.6
8.8
24.0
2
1.8
3/4"
7/8"
8.73
8500
13.6
•Compressor Lubricant: K) Hermetic Oil FVC56EA
•NC: Nominal Current @ condition -100C Te/ +320C Ta
•MCC: Maximum Continuous Current
•FLC: Full Load Current
Table 3: Unit SEPR, Sound Data, Dimension and Weight
Model
SEPR (10K SH)
SPL @
10m dB(A)
Overall Dimensions (mm)
Mounting Dimensions (mm)
Dry Weight
Gross Weight
R448A
R449A
Width
Depth
Height
Width
Depth
(kgs)
(kgs)
LRMIFS0300AXY1
3.03
3.03
31.3
1334
546
872
945
500
116
154
LRMIFS0600AXY1
3.39
3.39
39.8
1334
546
872
945
500
134
172
LRMIFS0900AXY1
3.60
3.60
44.1
1348
600
1727
940
560
212
271
•Seasonal Energy Performance Ratio (SEPR) rating condition @ condition -100C Te, suction superheat (SH) 10K.
•Sound Pressure Level (SPL) measured in an anechoic room at -10°C Te/+32°C Ta MT conditions at 60rps. Alternative conditions may produce different results.
The performance data shown in the Table 4 to 6 has the following criteria:
•Te: Evaporating Temperature
•Ta: Ambient Temperature
•CC: Cooling Capacity (Watts)
•PC: Power Consumed (Watts)
•SH: Suction Superheat 10K
•SC: Subcooling 0K
•COP: Coefficient of Performance
•Data presented in accordance with BS EN13215:2016

T-CU19-JAN24-1 Page 6
Table 4: Performance Data of LRMIFS0300AXY1 R448A/ R449A)
MODEL
SPEED, rps
Te Ta
-20
-15
-10
-5
0
5
LRMIFS0300AXY1
30
27
CC
1567
1881
2246
2667
3149
3695
30
27
PC
884
930
975
1020
1066
1111
30
27
COP
1.77
2.02
2.3
2.61
2.95
3.33
30
32
CC
1497
1795
2142
2542
2999
3517
30
32
PC
905
978
1050
1123
1195
1268
30
32
COP
1.65
1.84
2.04
2.26
2.51
2.77
30
35
CC
1453
1742
2077
2463
2905
3406
30
35
PC
918
1006
1095
1184
1272
1361
30
35
COP
1.58
1.73
1.9
2.08
2.28
2.5
30
38
CC
1408
1687
2011
2383
2809
3293
30
38
PC
930
1035
1140
1245
1350
1455
30
38
COP
1.51
1.63
1.76
1.91
2.08
2.26
30
43
CC
1332
1593
1896
2245
2645
3098
30
43
PC
951
1083
1215
1347
1479
1611
30
43
COP
1.4
1.47
1.56
1.67
1.79
1.92
60
27
CC
3239
3873
4582
5368
6231
7173
60
27
PC
1733
1757
1780
1803
1827
1850
60
27
COP
1.87
2.2
2.57
2.98
3.41
3.88
60
32
CC
3058
3665
4348
5110
5951
6875
60
32
PC
1750
1840
1930
2020
2110
2200
60
32
COP
1.75
1.99
2.25
2.53
2.82
3.13
60
35
CC
2943
3535
4203
4949
5778
6693
60
35
PC
1760
1890
2020
2150
2280
2410
60
35
COP
1.67
1.87
2.08
2.3
2.53
2.78
60
38
CC
2825
3401
4053
4785
5602
6507
60
38
PC
1770
1940
2110
2280
2450
2620
60
38
COP
1.6
1.75
1.92
2.1
2.29
2.48
60
43
CC
2620
3170
3796
4504
5301
6191
60
43
PC
1787
2023
2260
2497
2733
2970
60
43
COP
1.47
1.57
1.68
1.8
1.94
2.08
80
27
CC
4116
4906
5795
6788
7891
9110
80
27
PC
2587
2661
2735
2809
2883
2957
80
27
COP
1.59
1.84
2.12
2.42
2.74
3.08
80
32
CC
3908
4659
5503
6446
7496
8657
80
32
PC
2470
2640
2810
2980
3150
3320
80
32
COP
1.58
1.76
1.96
2.16
2.38
2.61
80
35
CC
3780
4506
5322
6235
7252
8379
80
35
PC
2400
2628
2855
3082
3310
3537
80
35
COP
1.57
1.71
1.86
2.02
2.19
2.37
80
38
CC
3649
4349
5137
6020
7003
8096
80
38
PC
2330
2615
2900
3185
3470
3755
80
38
COP
1.57
1.66
1.77
1.89
2.02
2.16
80
43
CC
3425
4083
4822
5652
6580
7614
80
43
PC
2213
2594
2975
3356
3737
4117
80
43
COP
1.55
1.57
1.62
1.68
1.76
1.85
100
27
CC
5068
6004
7051
8217
9511
10938
100
27
PC
3008
3182
3355
3528
3702
3875
100
27
COP
1.68
1.89
2.1
2.33
2.57
2.82
100
32
CC
4826
5713
6704
7807
9030
10380
100
32
PC
3160
3385
3610
3835
4060
4285
100
32
COP
1.53
1.69
1.86
2.04
2.22
2.42
100
35
CC
4678
5535
6491
7554
8734
10037
100
35
PC
3125
3412
3700
3988
4275
4563
100
35
COP
1.5
1.62
1.75
1.89
2.04
2.2
100
38
CC
4527
5353
6274
7297
8433
9760
100
38
PC
3090
3440
3790
4140
4490
4840
100
38
COP
1.47
1.56
1.66
1.76
1.88
2.02
100
43
CC
5044
5903
6859
7920
100
43
PC
3613
4025
4437
4848
100
43
COP
1.40
1.47
1.55
1.63

T-CU19-JAN24-1 Page 7
Table 5: Performance Data of LRMIFS0600AXY1 (R448A/ R449A)
MODEL
SPEED, rps
Te
Ta
-20
-15
-10
-5
0
5
LRMIFS0600AXY1
30
27
CC
2937
4130
5324
6517
7710
8903
30
27
PC
1706
1749
1793
1836
1880
1924
30
27
COP
1.72
2.36
2.97
3.55
4.10
4.63
30
32
CC
2827
3897
4966
6036
7105
8175
30
32
PC
1770
1860
1950
2040
2130
2220
30
32
COP
1.60
2.09
2.55
2.96
3.34
3.68
30
35
CC
2761
3756
4752
5747
6742
7737
30
35
PC
1810
1928
2045
2163
2280
2397
30
35
COP
1.53
1.95
2.32
2.66
2.96
3.23
30
38
CC
2695
3616
4537
5458
6379
7300
30
38
PC
1850
1995
2140
2285
2430
2575
30
38
COP
1.46
1.81
2.12
2.39
2.63
2.83
30
43
CC
2585
3382
4180
4977
5774
6571
30
43
PC
1915
2106
2297
2489
2680
2871
30
43
COP
1.35
1.61
1.82
2.00
2.15
2.29
60
27
CC
5004
7134
9263
11393
13523
15653
60
27
PC
3103
3347
3592
3836
4080
4324
60
27
COP
1.61
2.13
2.58
2.97
3.31
3.62
60
32
CC
4787
6694
8600
10507
12413
14320
60
32
PC
3270
3560
3850
4140
4430
4720
60
32
COP
1.46
1.88
2.23
2.54
2.80
3.03
60
35
CC
4805
6540
8276
10011
11747
13483
60
35
PC
3463
3758
4052
4346
4640
4934
60
35
COP
1.39
1.74
2.04
2.30
2.53
2.73
60
38
CC
4781
6356
7931
9506
11081
12679
60
38
PC
3630
3935
4240
4545
4850
5155
60
38
COP
1.32
1.62
1.87
2.09
2.28
2.46
60
43
CC
4606
5947
7289
8630
60
43
PC
3824
4168
4512
4856
60
43
COP
1.20
1.43
1.62
1.78
80
27
CC
8479
10114
11749
13383
15018
16653
80
27
PC
4402
4779
5156
5533
5910
6287
80
27
COP
1.93
2.12
2.28
2.42
2.54
2.65
80
32
CC
7723
9386
11049
12712
14375
16038
80
32
PC
4540
4995
5450
5905
6360
6815
80
32
COP
1.70
1.88
2.03
2.15
2.26
2.35
80
35
CC
7153
8862
10571
12280
13989
15698
80
35
PC
4690
5175
5660
6145
6630
7115
80
35
COP
1.53
1.71
1.87
2.00
2.11
2.21
80
38
CC
6615
8362
10109
11856
13603
80
38
PC
4820
5340
5860
6380
6900
80
38
COP
1.37
1.57
1.73
1.86
1.97
80
43
CC
5826
7609
9393
11176
80
43
PC
4977
5570
6163
6757
80
43
COP
1.17
1.37
1.52
1.65
100
27
CC
9980
11765
13549
15334
100
27
PC
5932
6342
6753
7164
100
27
COP
1.68
1.85
2.01
2.14
100
32
CC
9037
11117
13196
15276
100
32
PC
6190
6710
7230
7750
100
32
COP
1.46
1.66
1.83
1.97
100
35
CC
8471
10728
12984
15241
100
35
PC
6345
6904
7462
8021
100
35
COP
1.33
1.55
1.74
1.90
100
38
CC
7905
10339
12773
15207
100
38
PC
6500
7105
7710
8315
100
38
COP
1.22
1.46
1.66
1.83
100
43
CC
6961
9690
100
43
PC
6758
7465
100
43
COP
1.03
1.30

T-CU19-JAN24-1 Page 8
Table 6: Performance Data of LRMIFS0900AXY1 (R448A/ R449A)
MODEL
SPEED, rps
Te Ta
Column1
-20
-15
-10
-5
0
5
LRMIFS0900AXY1
30
27
CC
3401
4600
5799
7269
8740
10211
30
27
PC
2465
2469
2473
2478
2482
2486
30
27
COP
1.38
1.86
2.34
2.93
3.52
4.11
30
32
CC
3328
4220
5112
6310
7508
8706
30
32
PC
2740
2740
2740
2740
2740
2740
30
32
COP
1.21
1.54
1.87
2.30
2.74
3.18
30
35
CC
3282
3991
4700
5735
6769
7804
30
35
PC
2905
2902
2900
2898
2895
2893
30
35
COP
1.13
1.38
1.62
1.98
2.34
2.70
30
38
CC
3235
3762
4288
5159
6030
6901
30
38
PC
3070
3065
3060
3055
3050
3045
30
38
COP
1.05
1.23
1.40
1.69
1.98
2.27
30
43
CC
3153
3377
3602
4200
4799
5397
30
43
PC
3345
3336
3327
3318
3308
3299
30
43
COP
0.94
1.01
1.08
1.27
1.45
1.64
60
27
CC
6915
9483
12050
15050
18050
21049
60
27
PC
4460
4648
4835
5023
5210
5398
60
27
COP
1.55
2.04
2.49
3.00
3.46
3.90
60
32
CC
6609
8644
10680
13449
16217
18986
60
32
PC
5160
5285
5410
5535
5660
5785
60
32
COP
1.28
1.64
1.97
2.43
2.87
3.28
60
35
CC
6410
8134
9857
12487
15118
17748
60
35
PC
5580
5668
5755
5843
5930
6018
60
35
COP
1.15
1.44
1.71
2.14
2.55
2.95
60
38
CC
6199
7617
9035
11527
14018
16510
60
38
PC
6000
6050
6100
6150
6200
6250
60
38
COP
1.03
1.26
1.48
1.87
2.26
2.64
60
43
CC
5817
6741
7664
9925
12186
14446
60
43
PC
6700
6688
6675
6663
6650
6638
60
43
COP
0.87
1.01
1.15
1.49
1.83
2.18
80
27
CC
9718
12601
15485
18266
21048
23830
80
27
PC
6486
6647
6808
6969
7130
7291
80
27
COP
1.50
1.90
2.27
2.62
2.95
3.27
80
32
CC
9416
11589
13762
16480
19198
21916
80
32
PC
6920
7210
7500
7790
8080
8370
80
32
COP
1.36
1.61
1.83
2.12
2.38
2.62
80
35
CC
9225
10977
12729
15408
18088
20768
80
35
PC
7180
7547
7915
8282
8650
9018
80
35
COP
1.28
1.45
1.61
1.86
2.09
2.30
80
38
CC
9028
10361
11695
14337
16978
80
38
PC
7440
7885
8330
8775
9220
80
38
COP
1.21
1.31
1.40
1.63
1.84
80
43
CC
8682
9327
9973
12550
80
43
PC
7873
8447
9021
9596
80
43
COP
1.10
1.10
1.11
1.31
100
27
CC
12134
14791
17449
20098
22748
25397
100
27
PC
9795
9839
9883
9928
9972
10016
100
27
COP
1.24
1.50
1.77
2.02
2.28
2.54
100
32
CC
11703
13906
16109
19296
22483
25670
100
32
PC
10120
10235
10350
10465
10580
10695
100
32
COP
1.16
1.36
1.56
1.84
2.13
2.40
100
35
CC
11431
13368
15306
18815
22325
25834
100
35
PC
10315
10472
10630
10788
10945
11103
100
35
COP
1.11
1.28
1.44
1.74
2.04
2.33
100
38
CC
11150
12826
14502
18334
22166
100
38
PC
10510
10710
10910
11110
11310
100
38
COP
1.06
1.20
1.33
1.65
1.96
100
43
CC
10657
11910
13163
17533
100
43
PC
10835
11106
11377
11648
100
43
COP
0.98
1.07
1.16
1.51

T-CU19-JAN24-1 Page 9
Application Guidelines
Condensing Unit Selection
Selection of the correct size of inverter condensing unit as
method below:
Select a condensing unit size which achieves the peak load
system cooling capacity demand at its maximum speed.
It should ensure that the condensing unit
capacity at minimum speed (30rps) is not
higher than the necessary cooling capacity for
the smallest evaporator in the system. Failure
to meet this criterion will cause condensing
unit work outside its application envelope and as
consequence reduce lifetime.
Example (R448A, Evaporating temperature: -100C,
Ambient temperature 320C):
Evaporator 1: 5kW
Evaporator 2: 3kW
Evaporator 3: 2.6kW
Evaporator 4: 2.5kW
Total maximum cooling capacity = 13.1kW
Minimum cooling capacity = minimum evaporator capacity
= 2.5kW
According to the capacities R448A at Te = -100C, Ta
=320C, condensing unit JEHSI-066-B4-M-3 (maximum
capacity 13.2kW and minimum capacity 5.0kW)
Condensing unit maximum capacity 13.2kW achieves the
peak load system cooling capacity 13.1kW but minimum
speed 30rps which deliver minimum capacity exceed the
necessary cooling capacity for the smallest evaporator
(2.5kW).
In above case, it is recommended to connect few
evaporators together (regulated by one thermostat) to
achieve smallest required capacity higher than the minimum
capacity of the condensing unit: by connecting Evaporator 3
and Evaporator 4 via one common thermostat (2.6kW +
2.5kW = 5.1kW), which is higher than the minimum
capacity of the condensing unit (5.0kW)
Table 7: Compressor Speed Range
Indicator:
rps: revolution per second of motor shaft (rotor)
rpm: revolution per minute of motor shaft (rotor)
rps = rpm / 60
Suction line shall be insulated to avoid:
•High superheat during high ambient condition can
create high discharge temperature.
•Too low superheat during low ambient condition that
can condense refrigerant inside suction line.
Table 8: Operating Limit
Operating Limits
Recommendation
Discharge gas
temperature
1100C maximum
Evaporator outlet
superheat
Above 6K (to avoid liquid flood
back)
Suction gas
superheat at
compressor inlet
Not more than 20K
Voltage supply
Min: 360V, Max: 440V
Phase asymmetry
+/- 3%
Frequency
50Hz +/- 1%
Outdoor ambient
Min: -150C, Max: 430C
Compressor
The scroll compressor inside Daikin inverter
condensing unit is a high-pressure dome
compressor, with 6 poles brushless DC
motor (BLDCM). The compressor cannot
operate without the frequency converter. It
will be destroyed immediately if connected directly to the
public network.
The pressure inside the shell of compressor is a high
(discharge) pressure and have high temperature. Care must
be taken when orientating the power supply cables to the
main isolator. Never touch the power supply cable to the
body of compressor, unless heat resistant cables are used.
Health and Safety
Daikin inverter condensing unit must be
installed and commissioned by competent
personnel, who are familiar with refrigeration
systems and components including all controls.
To avoid potential injury, use care when
working around coil surfaces or sharp edges of metal
cabinets. All piping and electrical wiring should be installed
in accordance with all applicable standards and local laws.
General Information
Before Installation
•Ensure the units received are the correct models for the
intended application.
•Ensure the refrigerant, electrical supply and maximum
working pressure are all suitable for the proposed
application.
•Check there is no damage to the units. Any damage
should be reported to the supplier immediately.
•Check that the proposed equipment locations are
suitable and provide adequate support for the weight
of the units.
Offloading and Lifting
•Whenever a condensing unit is lifted, it should be from
the base and, where possible, all packing and
protection is kept in position.
•If lifting equipment is required, ensure that it is suitable,
certificated, and that the operators are qualified to
use it.
Compressor speed
Minimum
Maximum
rps
30
100
rpm
1800
6000

T-CU19-JAN24-1 Page 10
•When using a fork-lift or pallet truck to lift the unit, the
two support points should be sufficiently apart to give
stability when lifting and suitably placed to distribute
the load on the forks.
•If slings are used, care should be taken to ensure that
the slings do not crush the casework or coil.
•When lifting by crane, use spreader bars to prevent
compressing the top of the equipment.
•Do not drop the unit. Should this inadvertently happen,
it should be immediately unpacked and inspected for
damage.
•Use the appropriate spreader bars/lifting sling with
the holes and lugs provided.
During Installation and subsequent maintenance
•Installation and maintenance are to be performed only
by qualified personnel who are familiar with local
codes and regulations and experienced with this type
of equipment.
•Safe working methods are identified, and operatives
have suitable Personal Protective Equipment (PPE).
•Ensure the working area has adequate ventilation
during brazing procedures.
•The units contain moving machinery and electrical
power hazards, which may cause severe injury or
death. Disconnect and shut off power and wait until all
LEDs on frequency converter goes off before
installation or service of the equipment.
•Refrigerant release into the atmosphere is illegal.
Proper evacuation, recovery, handling, and leak testing
procedures must be observed all the time.
•Units must be earthed.
•No maintenance work should be attempted prior to
disconnecting the electrical supply.
•The electrical covers and fan guards must remain
always fitted.
•Use of the units outside of the design conditions and the
application for which the units were intended may be
unsafe and be detrimental to the units, regardless of
short term or long-term operation.
•The units are not designed to withstand loads or stress
from other equipment or personnel. Such extraneous
loads or stress may cause failure/leak/injury.
•The installer must fix the unit securely on installation
using the M8 bolt holes in the unit feet to prevent
instability from accidental contact or from exposure to
the elements (e.g., wind).
•The units are not designed to operate with any
restrictions such as heavy snowfall around them.
Additional measures (such as shielding of the units) shall
be implemented as required.
Installation
Unit location
•To achieve maximum cooling capacity, the installation
location for the condensing unit should be carefully
selected.
•Install the condensing unit in such a way so that hot air
ejected by the condensing unit cannot be drawn in
again (short circuit of hot discharge air). Allow
sufficient space for maintenance around the unit.
Figure 4: Positioning of Condensing Unit
•Ensure that there is no obstruction to air flow into or out
of the unit. Remove obstacles which block air intake or
discharge.
Figure 5: Air Circulation for Condenser
•The location must be well ventilated, so the unit can
draw in and distribute plenty of air thus lowering the
condensing temperature.
•Air leaving the condenser should avoid facing
prevailing wind, which impedes air flow and thus
causing high condensing temperature.
•To optimize the unit running conditions, the condenser
coil must be cleaned at regular intervals.
•The unit must be level in all directions.
•It is recommended to install the unit on rubber grommet
or vibration dampers.
•Models LRMIFS0300AXY1 and LRMIFS0600AXY1are
suitable for both ground and wall mounting on
brackets, but LRMIFS0900AXY1is only suitable for
ground mounting.
Special attention should be given if unit
installed near to the sea as this can reduce
unit lifespan due to corrosion of metal
parts.
✓
✓
X
X

T-CU19-JAN24-1 Page 11
Installation Clearances
The installation location should allow sufficient space for air
flow and maintenance around the unit.
Figure 6: Installation Clearance
Field Piping
Pipe sizing should only be determined by
qualified personnel. Correct line sizing will
minimize the pressure drop and maintain
sufficient gas velocity for proper oil return.
All applicable standards must be observed in the
installation of refrigerant piping.
To ensure satisfactory operation and performance, the
following points should be noted:
•Pipework routes must be as simple and as short as
possible.
•Avoid low points on pipework where oil can
accumulate.
•Suction gas velocity must be sufficient to ensure good
oil return.
•Use only clean, dehydrated refrigeration grade
copper tube with long radius bends.
•Avoid flare type connections and take great care when
brazing. Use brazing filler alloys containing phosphorus
such as BCuP-7 without flux for joining copper tubes.
•Dissimilar metals such as copper and brass shall be
joined using an appropriate flux with high silver
content filler material such as BAg-34. Apply flux
sparingly to the clean tube only and in a manner to
avoid leaving any excess inside of completed joints.
•Run braze without over filling to ensure there is no
leakage into the tube.
•To prevent oxidation, blow oxygen free nitrogen
through pipework when brazing.
•Install insulation on all suction lines and on all pipes
penetrating walls or passing through hot areas.
•Adequately support all pipework at a maximum of 2m
intervals.
•Where the condensing unit is situated below the indoor
unit (coldroom evaporator / display case), the height
difference between the two units should be no more
than 6 meters.
•In vertical pipework, the use of U-trap and double
suction risers is often required. These suction risers must
always be fitted with a U-trap at the bottom and a P-
trap at the top and never be higher than 4m unless a
second U-trap system is fitted.
•Additional oil may be required if piping length
exceeds 20m or multiple oil traps are fitted. Check the
oil level closely during commissioning and add oil as
necessary. Add oil in small amounts. Do not overfill the
compressor!
•Suction pipework should slope gently back towards the
unit to assist oil return to the compressor. A fall of
approximately 2cm per meter of pipework is
acceptable.
•Liquid lines should be sized to ensure a full supply of
liquid refrigerant to the expansion device. Careful
attention should be paid to sizing of liquid lines on
large risers (maximum rise 6m).
•In some circumstances, a suction accumulator (not
supplied) may be required. It offers protection against
refrigerant flood back during operation and against
off-cycle migration by adding internal free volume to
the low side of the system.
•Tests must be conducted to ensure the amount of off-
cycle migration to the compressor does not exceed the
compressor’s charge limit of 6kgs.
•All evaporators must have their own thermostat/liquid
line solenoid valve.
•The maximum recommended pipe length is 25m from
the closest indoors.
•It is recommended to install Pressure Relief Valve on
the liquid receiver if there is a risk of fire incidence.
Increasing temperature will lead to pressure increase in
receiver.
•No valves and detachable joints shall be in areas
accessible to the public except when they comply with
EN 16084.
•Field piping for outdoor unit located below indoor unit:
Inverted P-trap is necessary (Figure 8). To prevent
refrigerant from draining into the compressor during
off-cycle.
One of the main factors affecting equipment
reliability and compressor service life is
refrigeration circuit contamination.
During installation, circuit contamination can be caused by:
•Brazing & Welding Oxides
•Filings & Particles from de-burring pipework
•Brazing Flux
•Moisture & Air
Figure 7: Piping layout for outdoor above
indoor
INDOOR
UNIT
OUTDOOR
UNIT
MAX. 4m MAX. 4m
8 TO 12 m/s
U-TRAP AS SHORT AS POSSIBLE
2cm/m SLOPE,
4m/s OR MORE
SUCTION LINE
LIQUID LINE
2cm/m SLOPE, 4m/s OR MORE
MAX. TOTAL HEIGHT <10M
BULB LOCATION
U-TRAP AS
SHORT AS
POSSIBLE
INVERTED P-TRAP

T-CU19-JAN24-1 Page 12
Figure 8: Piping layout for outdoor below
indoor
Pressure Testing
•The condensing units are pressure tested in the factory
prior to dispatch. All units come with a holding charge
of oxygen free nitrogen. Remove the holding charge
and indication tag prior to pipework installation using
the service valve or regulator with pressure gauges
and hoses.
•Once the pipework installation is complete, it should be
pressure tested prior to evacuation to test for leaks.
•A pressure leak test should be carried out using
oxygen free nitrogen (OFN). NEVER USE OXYGEN
FOR PRESSURE TESTING SYSTEMS. A calibrated
nitrogen pressure regulator must always be used.
Before starting any pressure testing, ensure the area
surrounding the system is safe, inform relevant
personnel and fit warning signs indicating high pressure
testing. Also, use correct Personal Protection Equipment
(PPE) as required.
•Always pressurize the system slowly, preferably in
stages up to the maximum required pressure. Maximum
test pressures applicable to the unit are as follows:
Table 9: Test Pressure
Test Pressure (barg/psig)
High side
Low side
28/405
19/275
•Listen for any possible leaks and check all joints with
bubble spray. If any leaks are discovered, release
pressure slowly from system until empty, repair leak
and then restart pressure testing procedure. Never
attempt to repair a leak on a pressurized system.
•A strength test should also be incorporated (to install
pipework only) according to applicable standards.
•Once testing has been completed satisfactorily, release
the pressure from the system gradually and safely to
external atmosphere.
Evacuation and Charging
Moisture prevents proper functioning of the
compressor and the refrigeration system.
Ensure that a good quality vacuum pump is
used to pull a minimum vacuum of 250
microns (0.25 torr).
Once pressure testing has been completed, the system can
now be evacuated to remove air and any moisture from the
piping. This can be done as follows:
•Ensure any nitrogen charge is safely released from the
system.
•Connect a gauge manifold to the connections on the
service valves on the condensing unit.
•Connect a vacuum pump and vacuum gauge to the
system.
•Ensure all gauge manifold and service valves are open
as required.
•Evacuate the system until vacuum is below 250 microns
(0.25 torr).
Note: A triple evacuation procedure is recommended for all
new systems or where moisture is suspected.
•Once the system is isolated and the vacuum pump is
switched off, any rise in pressure indicates that either
there may be a leak in the system or moisture is still
present. In this case, recheck the system for leaks,
repair as necessary, and then restart the evacuation
procedure. Once completed satisfactorily, the vacuum
pump and vacuum gauge can be removed.
•At this point, the refrigerant charge can be added to
the system as required. Refrigerants must be charged
in the liquid phase. Charging liquid into the suction side
of the system should ONLY be done with a metering
device. Use calibrated weighing scales to record the
amount of refrigerant added to the system.
OUTDOOR
UNIT
INDOOR
UNIT
INVERTED P-TRAP
SUCTION LINE
LIQUID LINE
MAX. RISE 6M
2cm/m SLOPE, 4m/s OR MORE
BULB LOCATION

T-CU19-JAN24-1 Page 13
Electrical
Below table lists recommended wiring sizes for the
condensing unit power supply cables. These wiring sizes are
valid for cable lengths up to 30m.
Table 10: Recommended wiring sizes
Model
Cable size, mm2(from network
to unit main switch)
LRMIFS0300AXY1
4
LRMIFS0600AXY1
4
LRMIFS0900AXY1
6
•Note: Above is just a guideline for wire size. Installer
might specify cable size different from this guideline,
depending on the wire material and length, system
design, ambient temperature, etc.
•Cables to the condensing unit should wherever possible
be routed through the cable glands supplied on the
rear panel and routed through the wire bush/cable
gland designated for the incoming supply at the control
box casing.
Separate power cables as
much as possible from the
probe and digital input
cables to avoid possible
electromagnetic
disturbance. Never run
power cables and signal
cables in the same conduits.
•Connect the mains supply to the units as per the wiring
diagrams shown in Figure 23-25.
•Ensure that the power supply corresponds to the unit
and that the power supply is stable.
•Connect power supply according to the present norm
and legal requirement. Ensure that the unit is properly
connected to the ground.
•The unit is equipped with a motor circuit breaker with
overload protection for frequency drive. Overload
protection is preset from factory and value can be
found on the wiring diagram adhered on the control
box cover.
•Unit equipped with manual reset high pressure switch
and auto reset low pressure switch.
•If system pressure exceeds high pressure switch cut out
pressure, it will immediately break the circuit to digital
input “Safe Torque Off (STO)” on the drive. When the
STO contact is open, the drive stops operating,
bypassing the software control.
Phase Sequence for Correct
Compression
BLDC scroll compressor requires proper
phase sequence to secure correct rotation
direction and therefore compression. The
phase sequence has to be secured between
the drive and compressor. Compressor rotation direction
is not influenced by the phase sequence between
network and unit drive.
Warning When Touching Unit
When OFF
Frequency converters contain DC-link
capacitors that can remain charged even
when the frequency converter is not
powered. To avoid electrical hazards,
disconnect AC mains and wait at least 5
minutes for the capacitors to fully discharge before
performing any service or repair work. Failure to obey
this instruction before conduct service or repair could
result in death or serious injury.
The digital inputs are not a safety switch. The frequency
converter is still powered even though it was cut off by
digital input via alarms activation. Thus, do not remove 3
phase connections to the frequency converter, compressor
connections or other power connections while the frequency
converter is connected to power.
Earth Leakage Current
This product integrates a frequency converter
which can cause ground leakage currents
exceeding 3.5mA.
According to IEC 61800-5-1 a reinforced
Protective Earth connection must be ensured
with a min. 10mm2or an additional PE wire which must
at least same cross section as the mains supply wires-
must be terminated separately.
This product can cause a DC current in the protective
conductor. If a residual current device (RCD) is used for
extra protection on the mains supply side, it must be a Type
B (time delayed). The use of RCD and protective earth for
the frequency converter must always follow national and
local regulations.

T-CU19-JAN24-1 Page 14
Commissioning
Before performing any service/maintenance
work on the unit, ensure that the power
supply is switched off and then wait at least
5 minutes to allow the capacitor to fully
discharge. Failure to do so may result in
serious injury or death.
To gain access to the electrical box, turn the mains isolator
switch on the front of the unit to the OFF position, loosen the
screws on the left-hand side of the door and open the door.
The electrical box is located behind the front door. Remove
the screws in the electrical box cover to access components.
Figure 9: Access Point
Access to Controller and LCD
Display
Only Authorized personnel are allowed to
access the controller and LCD display.
Please wait approximately 1 minute for
controller initialization after switching on the
main isolator.
Pre startup checks
Before starting the condensing unit, the following checks
should be carried out as a minimum:
•Check electrical supply is correct and all connections
are sound.
•All moving parts are free, and guards are fitted.
•Compressor oil level satisfactory.
•LCD display cable is connected to the controller to
enable settings.
•Change the required setting to suit the type of
application. Else, maintain as factory default setting for
medium temperature application.
•All valves are in correct operating position.
•Initial refrigerant charge through liquid line.
•Crankcase heater energized for a minimum of 12 hours
before compressor start-up.
•Gauge manifold connected to both low and high sides
of system.
Table 11: Factory Default Setting
Description
Factory Default
Setting
Remark
Refrigerant
preset on
controller
R448A
Type of refrigerant
available for
selection: R448A,
R449A, R404A
Low
Pressure
Switch
Cut In: 3barg,
Differential:
2barg (Auto
Reset)
To cut off compressor
when suction pressure
drops below 1barg
* Software low
pressure alarm
threshold 1.2barg
(Cae26)
High
Pressure
Switch
Cut Out:
28barg,
Manual Reset:
22barg
Manual reset on the
cartridge type high
pressure switch is
required after the
fault is removed.
Unit Status
On/Off on
keyboard
Off position
Must log in through
service or
manufacturer
password to turn on
the unit
Crankcase
Heater
Activation
Activated only
when by
regulation
and/or alarm
Compressor crankcase
heater will be
activated when
compressor off and
external temperature
is below 150C.
(Cag43, Cag44)
Condenser
Fan
Modulation
Setpoint:
16barg,
differential:
3barg,
Proportional.
Cut In only
when
compressor is
turned ON
Fan starts to rotate
when compressor is
turned ON and
discharge pressure
more than 13barg.
Fan runs at full speed
when pressure more
than 19barg.
The unit is equipped with an electronic
controller and frequency converter, which
had been pre-programmed with parameters
ready for use with the actual unit.
Parameters for operation with refrigerant
R448A is defaulted. The parameter needs to be changed
if another refrigerant is to be used (Refer to Refrigerant
Selection).
Enter password to access controller settings.
Please see page 15 for different access level
passwords.
Before running the unit, the controller settings for
Refrigerant Selection (refer Page 16) should be
checked/altered as required:
Running the unit
•Switch unit on by controller (refer Page 16).
•Run the unit and check compressor and condenser fan
operation.
•Check system pressures and temperatures, gas charge
and running currents of unit to ensure correct operation.
•Check transducer / sensor readings are accurate
(calibrated equipment required).

T-CU19-JAN24-1 Page 15
•Check compressor suction superheat. This should be
between 10K and 20K in normal operating conditions.
•Final adjustment of controller settings.
•Allow the system to run for 3 –4 hours. Check
compressor oil level and top up with the correct oil
type as required (see Table 2). Recheck the compressor
oil level again after 24 hours operation.
•Carry out final leak test and ensure all panels/covers
are fitted and screws tightened.
•Log all information along with the system model and
serial numbers for future reference.
•Ensure that the customer / responsible person is
provided with basic operating instructions and where
electrical isolators are situated in case of emergency.
User Terminal Interface –LCD
Display
The user terminal can be used to perform all the operations
allowed by the program, display the operating conditions
of the unit all the time, and set the parameters. It can be
disconnected from the main board, and in fact is not
required for operation.
Figure 10: LCD Display
Table 12: LCD Display Button Functions
ALARM
Displays the alarms. Press around 2 seconds to
reset the alarm manually after the fault is
removed.
UP
If the cursor is in the home position (top left
corner), scrolls up the screens in the same group;
if the cursor is in a setting field, and increases the
value.
DOWN
If the cursor is in the home position (top left
corner), scrolls down the screens in the same
group; if the cursor is in a setting field, and
decreases the value.
ENTER
Used to move the cursor from the home position
(top left corner) to the setting fields, in the setting
fields confirms the set value and moves to the
next parameter.
PRG
Accesses the menu for selecting the group of
parameters to be displayed/modified (access to
the parameters is confirmed by pressing the
[Enter] button).
ESC
Used to move back to previous screen/sub-menu.
Continuous pressing of the ESC button will
eventually return to the HOME screen.
Controller Home Screen
Start Up Screen
Following controller power-up and initialization process
(approximately 1 minute), the controller home screen will
appear as follows:
The suction pressure, discharge pressure and compressor
running rps of the unit are displayed. If Unit Off by
keyboard is indicated in the lower box, then the unit is
switched OFF on the controller. To switch the unit ON, follow
instructions on Page 16 (Switch Unit ON/OFF by Controller).
Further information on the system conditions can be
displayed by pressing the DOWN arrow.
All controller parameters are preset in the
factory and are protected by password. It
depends on the inserted password for
different levels of accessibility.
Press “PRG”to enter screen Password management.
Password for Accessibility Level
•User: 0000 (only can change suction line setpoint (screen
Ab01, default 3.3barg) and Condensing setpoint
(Screen Ab05, default: 16barg), not authorization to
switch on/off by keyboard).
•Service: 1001 (access for all operation parameters,
except “advanced” configuration parameter).
•Manufacturer: 9009 (access to "advanced"
configuration parameters, e.g., C. Compressor->
Advanced, to change type of Refrigerant, compressor
model etc).
To change the parameter, the unit must be in
OFF mode. To access through different levels,
first need to logout from existing password
by scrolling to mask Ge02 Logout.

T-CU19-JAN24-1 Page 16
Changing Set Point
1. With controller Home screen displayed, Press PRG button
to go Main Menu screen and select “A. Unit Status”, press
ENTER and select “b. Setpoint” by DOWN button. Screen
Ab01 is displayed. To adjust the setpoint, you need the
cursor to be by the User setp., then use UP/DOWN buttons
to adjust value and then press ENTER to confirm setting.
2. Return the cursor to its ‘home starting point’ before you
can move to the next screen Ab05 by pressing the DOWN
button. Press ENTER until cursor point to User setp., use
UP/DOWN button to adjust value. Press ENTER to confirm
the setting and then ESC button repeatedly to return to
Home screen.
Please note that the set point value of 16.0 bar is
recommended for R448A/R449A/R404A operation.
Refrigerant Selection
*Applicable only with manufacturer password
All below steps must be accomplished if
refrigerant is changed from default:
1. Press PRG to go to the main menu, select “C.
Compressor” and press ENTER. Select “g. Advanced”
and press ENTER. Enter screen Cag01: Refrigerant
Type. Press ENTER to move cursor and UP/DOWN
button to select type of refrigerant. Press ENTER for
execution and press DOWN button to move to the next
screen.
2. Cag02: Select the compressor model. Refer compressor
nameplate on the unit to ensure correct model is
selected. Change Set Default: YES. Press ENTER for
execution. Press ESC button to go back to “g.
Advanced”. Press ENTER and DOWN button to go to
mask Cag49.
3. Cag49: Change Max pressure differ. admitted:
9.0bar. Press ENTER for execution.
4. Cag52: Start-up forced speed: 60.0rps; Max speed:
100.0rps; Min speed: 30.0rps. Press ENTER for the execution.
Ensure all data on Cag02, Cag49 and Cag52
are changed accordingly if Cag01 is modified
on the type of refrigerant.
Switch Unit ON/OFF (By
Controller)
*Applicable only with service password and manufacturer
password
1. With controller Home screen displayed, Press PRG
button to go Main Menu screen and select “A. Unit
Status”.
2. Press ENTER button. Screen “Unit Status” is displayed.
Select “c. On/Off” and then press ENTER button.
3. Switch Unit ON by using ENTER button. Indicator
pointing to ON means Unit is ON. (Press ENTER button
if want switch to OFF position.
4. Press ESC button repeatedly to return to Home Screen.
This should now show ON by KEY at the bottom of the
screen.
5. The unit will start up following a short delay (assuming
all conditions for compressor start-up are met).

T-CU19-JAN24-1 Page 17
Compressor Model Selection
*Applicable only with manufacturer password
Only one Scroll BLDC compressor controlled
via Power+ inverter can be selected. The type
of compressor is chosen in Compressors->
Advanced (Cag02).
The BLDC compressor is managed via
Modbus and works only if connected to an
inverter drive. If there is no communication
with the driver, the compressor will not be
able to operate.
•If the controller is replaced, the new system can be
configured manually under the menu Compressors ->
Advanced-> screen Cag02. Select YES for Set defaults
and press ENTER.
•Controller and drive must be powered and connected
via serial; the address of power+ must be 1 (default).
•The type of compressor should be selected from the list
of available compressors under Application: Low
Temperature; the number of motor poles and the
correct model of drive are defined automatically.
Table 13: List of Compressor in Controller
Motor Type
(R448A)
Motor Type
(R449A)
Motor Type
(R404A)
SIAM
AGK33FDA-
R448A
SIAM
AGK33FDA-
R449A
SIAM
AGK33FDA-
R404A
SIAM
AGK66FDB-
R448A
SIAM
AGK66FDB-
R449A
SIAM
AGK66FDB-
R404A
SIAM
AGK87FDC-
R448A
SIAM
AGK87FDC-
R449A
SIAM
AGK87FDC-
R404A
•If the model of drive is the same model or larger than
the drive selected based on the type of BLDC
compressor, the default values can be written, and
controller can control the compressor. Otherwise, the
message “Not compatible” will be shown.
Compressor Operation
Envelope management
•The compressor working zone in the software is defined
based on the following measurements:
oCondensing pressure
oEvaporation pressure
oDischarge temperature
and compares these against the compressor envelope.
The controller manages the demand for capacity sent
to the drive, in a controlled manner to maintain the
compressor operating conditions within the limits of
pressure and temperature defined by the manufacturer
(zone 1a-1b). The actions to keep the compressor
within the operating zone specified by the
manufacturer are:
oDecrease in acceleration or deceleration, when
compressor operation approaches the limits, until
holding the speed when operation is at the limit.
oSpeed reduction when operation is beyond the
high condensing pressure or high compression ratio
limits, to return within the permitted operating
zone.
•When compressor operation remains too long in a zone
outside of the envelope, an alarm is generated (mask
Cag55, default 60sec). The zone number and
description are shown on the alarm mask. During start-
up, when the compressor operates at a fixed speed for
the minimum ON time, this alarm is disabled.
•The discharge temperature alarm is always active.
•The following zones are defined:
1. Inside the envelope (a, b with different maximum
discharge temperature)
2. High compression ratio
3. High condensing pressure
4. High current
5. High evaporation pressure
6. Low compression ratio
7. Low pressure differential
8. Low condensing pressure
9. Low evaporation pressure
Figure 11: Compressor Operating Zone

T-CU19-JAN24-1 Page 18
Inverter compressor start-up:
Compressor is managed to start-up by adapting operating
speed to guarantee that the desired conditions and
excellent lubrication are reached very quickly. For this
reason, when starting the compressor is operated at a
settable fixed speed (Cag52) for the minimum ON time.
During this stage, the out-of-envelope alarm is disabled,
but speed control remains active if approaching or
exceeding zone 2 (maximum compression ratio), 3
(maximum condensing pressure) or 4 (current limit).
If 45 seconds after compressor start-up, the pressure
differential is less than 0.2barg higher than the value
measured at start-up, the controller stops the compressor
and generates a “No compressor start-up” alarm. This
alarm is automatically reset, and the controller tries to start
the compressor five times after a 30 second delay. After
the fifth attempt, the alarm is no longer automatically reset.
Figure 12: Compressor Startup Curve
The corresponding parameters are in loop: Compressors ->
Advanced -> masks Cag50, Cag51, Cag52:
Pressure differential during
start-up
•The BLDC compressor cannot start if the pressure
differential is greater than 9.0barg. This limit depends
on the maximum current delivered by the inverter. As
soon as the pressure differential falls below the
minimum threshold, the compressor can start.
•The corresponding parameters are in loop:
Compressors -> Advanced -> mask Cag49:
•When the pressure differential is 8.5barg (fixed
value), the compressor is ready to start.
Minimum pressure differential for lubrication
The min. pressure differential threshold for correct
lubrication is related to the type of BLDC compressor and
cannot be modified. The low-pressure differential alarm is
generated when the difference between condensing
pressure and evaporation pressure (DeltaP) remains below
the limit defaulted for a set time, and consequently
excellent lubrication is not guaranteed. The alarm stops the
compressor and is reset automatically. The alarm is not
active during defrosting.
The corresponding parameters are in loop: Compressors ->
Advanced-> mask Cag55:
Times
Time management includes a minimum On time, a minimum
Off time and a minimum time between two consecutive
starts. These parameters can be modified under
Compressors -> Configuration -> mask Caf35:
Figure 13: Times Control for Compressor Startup