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RAS-8HRNM
Hitachi RAS-8HRNM User Manual
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UTOPIA DC-INVERTER IVX/ES SERIES
H(V)RN(1)(S)(1)(E)
H(V)RNM(1)(E)
Service Manual
RAS-(3-6)HVRNM(1)E
RAS-(4-12)HRNM(1)(E)
RAS-(2-3)HVRN(1)(E)(S)
RAS-(4-6)HVRNS1E
RAS-(8/10)HRNSE
2
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
5
1 General Information
9
General Information
10
Copyright
10
Introduction
10
Environment-Friendly Units
10
Safety
11
Applied Symbols
11
Product Guide
12
Classification of IVX Series Outdoor Unit Models
12
Classification of es Series Outdoor Unit Models
12
Product Guide: Outdoor Units
13
Accessory Code List
14
2 Unit Installation
15
Safety Summary
16
Transportation of Outdoor Unit
17
Center of Gravity
18
Factory-Supplied Accessories for RAS-(8-12)HRNM
19
Installation Space (Initial Ckeck)
20
Ras-(2-3)Hvrn(1)(E)(S)
20
SMGB0060 Rev. 1
20
SMGB0060 Rev. 1
21
Ras-(3-6)H(V)Rnm(1)E / Ras-(4-10)Hvrns(1)E
24
Ras-(8-12)Hrnm
28
Place Provision
30
Place Provision for RAS-(3-12)H(V)RNM(1)(E) and RAS-(4-10)H(V)RNS(1)E
30
Place Provision Only for RAS-(2-3)HVRN(1)(E)(S)
33
Optional Parts and Installation
36
Optional Parts and Installation for RAS-(2-3)HVRN(1)(E)(S)
36
Optional Parts and Installation RAS-3HVRNME / RAS-(4-6)HVRNS1E
41
Optional Parts and Installation RAS-(4-6)H(V)RNM1E / RAS-(8/10)HRNSE
45
Optional Parts and Installation RAS-(8-12)HRNM
50
3 Piping Work and Refrigerant Charge
57
General Notes
58
Piping Work Connection Considerations
60
Piping Materials
60
Three Principles on Refrigerant Piping Work
62
Suspension of Refrigerant Piping
62
Brazing Work
63
Refrigerant Charge
64
Caution of the Pressure by Check Joint
64
Refrigerant Charge Quantity
65
Pump down Refrigerant
67
Outdoor Units IVX Series
68
Piping Connection
68
Refrigerant Piping Length
73
Refrigerant Piping Selection
74
Twin and Triple System Installation
75
Drain Discharging Boss
76
Outdoor Units es Series
78
Piping Connection
78
Refrigerant Piping Length
83
Refrigerant Piping Selection
84
Twin and Triple System Installation
86
Connecting Flare Adapter (Only for RAS-(2/2.5)HVRN1(E))
87
Drain Discharging Boss
87
4 Electrical Wiring
89
General Check
90
Electrical Wiring for the Outdoor Unit IVX Series
91
Electrical Wiring Connection for the Outdoor Unit
91
Setting the DIP Switches for the Outdoor Unit
92
Electrical Wiring for the Outdoor Unit es Series
96
Electrical Wiring Connection for the Outdoor Unit
96
Setting the DIP Switches for the Outdoor Unit
97
Electrical Wiring between Indoor Unit and Outdoor Unit
101
Wire Sizes
103
Wire Sizes for IVX Series
103
Wire Sizes for es Series
105
H-LINK System
106
Electrical Wiring Diagrams
116
Electrical Wiring Diagrams for IVX Series
116
Electrical Wiring Diagrams for es Series
120
5 Control System
125
Device Control System
126
Device Control System for IVX Series
126
Device Control System for es Series
128
Outdoor Units PCB
130
Outdoor Units PCB for IVX Series
130
Outdoor Units PCB for es Series
131
Protection and Safety Control
134
Protection and Safety Control for IVX Series
134
Protection and Safety Control for es Series
135
Standard Operation Sequence
136
Standard Operation Sequence for IVX Series
136
Dry Operation
138
Heating Operation
140
Standard Operation Sequence for es Series
143
Standard Control Functions
150
Standard Control Functions for IVX Series
150
Standard Control Functions for es Series
159
6 Optional Functions
169
Outdoor Units IVX and es Series
170
Available Ports
170
Configuration
171
Setting of the Optional Signals
172
Description of Optional Input Signals
173
Description of Optional Output Signals
174
Optional Functions
175
7 Test Run
181
Checking Procedure before the Test Run
182
Test Run Procedure Using the Remote Control Switch
184
Test Run Procedure Using the Wireless Remote Control Switch
186
Test Run Procedure from the Outdoor Unit Side
188
Check List
189
Check List for IVX Series
189
Check List for es Series
197
8 Troubleshooting
203
Initial Troubleshooting for IVX an es Series
204
Checking by Means of the 7-Segment Display
204
Failure of the Power Supply to the Indoor Unit and the Remote Control Switch
205
Abnormal Transmission between the Remote Control Switch and the Indoor Unit
206
Abnormal Operation of the Devices
206
Troubleshooting Procedure for IVX an es Series
212
Alarm Code
212
Troubleshooting by Alarm Code
215
Troubleshooting in Check Mode
291
Troubleshooting by Means of the 7-Segment Display
298
Troubleshooting by Means of the Flashing Alarm Leds for RPK-FSNM
302
Cause of Inverter Stoppage
303
Procedure for Checking each Main Part
307
Self-Checking Procedure of PCB by Means of the Remote Control Switch
307
Self-Checking of the Remote Control Switch
309
Self-Checking Procedure of the Indoor Unit PCB (Only for RPK)
311
9 Spare Parts
333
Spare Parts for IVX Series
334
Electrical Parts
346
Spare Parts for es Series
349
10 Servicing
361
Introduction
362
Servicing for IVX Series
363
Outdoor Unit RAS-3HVRNME
363
Removing Upper Cover
364
Removing Reversing Valve
370
Outdoor Units RAS-(4-6)H(V)RNM1E
374
Oudoor Units RAS-(8-12)HRNM
387
Servicing for es Series
403
Outdoor Units RAS-(2/2.5)HVRN1(E) and RAS-3HVRNS
403
Outdoor Units RAS-(4-6)HVRNS1E
410
Outdoor Units RAS-(8/10)HRNSE
422
Removing Electronic Expansion Valve Coil
432
Removing Electronic Expansion Valve and Solenoid Valve
434
11 Electrical Checks of Main Parts
441
Inverter
442
Inverter for IVX Series
442
Inverter for es Series
447
Thermistor
453
Electronic Expansion Valve
455
High Pressure Protection Device
456
Noise Filter (NF)
457
Noise Filter for IVX Series
457
Noise Filter for es Series
458
Capacitor (CB1, CB2)
460
Reactor (DCL)
461
Reactor (DCL) for IVX Series
461
Reactor (DCL) for es Series
461
Scroll Compressor
463
Reliable Mechanism for Low Vibrating and Low Sound
463
Principle of Compression
463
12 Maintenace Notes
465
Checking the Power Source and the Wiring Connection
466
Burnt-Out Compressor Due to an Insufficient Refrigerant Charge
467
Insufficient Cooling Performance When a Long Piping Is Applied
468
Abnormally High Operation Sound (in the Ceiling Type Indoor Unit)
469
Alarm Code "31
470
Not Cooling Well Due to Insufficient Installation Space for the Outdoor Unit
471
Caution with the Refrigerant Leakage
472
Maximum Permissible Concentration of the HCFC Gas
472
Calculation of the Refrigerant Concentration
472
Countermeasure for the Refrigerant Leakage According to the KHK Standard
472
Maintenance Work
473
Service and Maintenance Record
474
Service and Maintenance Record Using the 7-Segment Display
476
Service and Maintenance Record by Remote Control Switch
478
Pump-Down Method for Replacing the Compressor
480
4
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Hitachi RAS-8HRNM Specifications
General
Type
Split System
Cooling Capacity
2.5 kW
Heating Capacity
2.8 kW
Power Supply
220-240V, 50Hz
Refrigerant
R410A
Indoor Unit Weight
9 kg
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