Service Manual

ManualsBrandsHitachi ManualsAir ConditionersHitachi RAS-3-HVNC

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Table Of Contents

Contents
1. General information
- 1.1 General information
- 1.2 Safety
  - 1.2.1 Applied symbols
  - 1.2.2 Norms and Regulations
- 1.3 Product guide
2. Unit Installation
- 2.1 Safety summary
- 2.2 Transportation of outdoor unit
- 2.3 Center of gravity
- 2.4 Factory-supplied accessories for RAS-12HN(P/C)
- 2.5 Installation space (Initial ckeck)
- 2.6 Place provision
  - 2.6.1 Place provision for RAS-(2-2.5)HVNP / RAS-3HVNC
  - 2.6.2 Place provision for RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C)
- 2.7 Optional parts and installation
3. Piping work and refrigerant charge
- 3.1 General notes before performing pipe work
- 3.2 Piping connection for outdoor unit
- 3.3 Refrigerant piping range
- 3.4 Refrigerant charge
  - 3.4.1 Caution of the pressure by check joint
  - 3.4.2 Refrigerant charge quantity
- 3.5 Caution in case of refrigerant leakage
- 3.6 Piping work for compatibility with the piping of current installations where is used R22 or R407C.
- 3.7 Drain piping
  - 3.7.1 Drain discharging boss
4. Electrical wiring
- 4.1 General notes
  - 4.1.1 General check
- 4.2 Electrical wiring connection for the outdoor unit
- 4.3 Setting the DIP switches for the outdoor unit
- 4.4 Common wiring
  - 4.4.1 Electrical wiring between outdoor and indoor unit
  - 4.4.2 Wire size
- 4.5 H-LINK II system
- 4.6 System Control
  - 4.6.1 Individual Operation
  - 4.6.2 Simultaneous Operation
- 4.7 Electrical wiring diagrams
5. Control System
- 5.1 Device control system
- 5.2 Outdoor units PCB
- 5.3 Protection and safety control
- 5.4 Standard operation sequence
- 5.5 Standard control functions
6. Optional functions
- 6.1 Optional input and output signals (By 7-segment display)
- 6.2 Optional functions (By 7-segment display)
  - 6.2.1 Setting of the optional functions
  - 6.2.2 Description of the optional functions
- 6.3 Optional functions (By remote control switch)
7. Test run
- 7.1 Checking procedure before the test run
- 7.2 Test run procedure using the remote control switch (PC-ART)
- 7.3 Test run procedure using the remote control switch (PC-ARF)
- 7.4 Test run procedure using the wireless remote control switch (PC-LH3A/B)
- 7.5 Test run procedure from the outdoor unit side
- 7.6 Check list
  - 7.6.1 Check list on test run
  - 7.6.2 Check list on compressor
8. Troubleshooting
- 8.1 Initial troubleshooting
- 8.2 Troubleshooting procedure
- 8.3 Troubleshooting in check mode
- 8.4 Checking procedure for main parts
9. Spare parts
- 9.1 RAS-(2-2.5)HVNP
  - 9.1.1 Cycle and structural parts
  - 9.1.2 Parts table
- 9.2 RAS-3HVNC
  - 9.2.1 Cycle and structural parts
  - 9.2.2 Parts table
- 9.3 RAS-3HVNPE
- 9.4 RAS-(4-6)H(V)NPE
- 9.5 RAS-(4-6)H(V)NCE
- 9.6 RAS-(8-10)HN(P/C)E
- 9.7 RAS-12HN(P/C)
10. Servicing
- 10.1 Introduction
- 10.2 Servicing for Outdoor Units RAS-(2-2.5)HVNP and RAS-3HVNC
- 10.3 Servicing for Premium series
- 10.4 Servicing for Standard Series
11. Electrial checks of main parts
- 11.1 Inverter
- 11.2 Thermistor
- 11.3 Electronic expansion valve
- 11.4 High pressure protection device
- 11.5 Noise filter (NF)
  - 11.5.1 Noise filter for 3N~ (400V/50Hz)
  - 11.5.2 Noise filter for 1~ (230V/50Hz)
- 11.6 Capacitor (CB1 CB2)
- 11.7 Reactor (DCL)
  - 11.7.1 Reactor (DCL) for 3N~ (400V/50Hz)
  - 11.7.2 Reactor (DCL) for 1~ (230V/50Hz)
- 11.8 Scroll compressor
  - 11.8.1 Reliable mechanism for low vibrating and low sound
  - 11.8.2 Principle of compression
12. Maintenance notes
- 12.1 General notes
- 12.2 Maintenance work
- 12.3 Service and maintenance record
- 12.4 Service and maintenance record using the 7-segment display
- 12.5 Service and maintenance record by remote control switch
- 12.6 Pump-down method for replacing the compressor
General information
- General notes
- Introduction
- Environment-friendly units
Safety
- Applied symbols
- Norms and Regulations
Product guide
- Classification of outdoor unit models
- Classification of indoor unit models
- Product guide: Outdoor units
- Outdoor unit accessory code list
- Product guide: Indoor units & complementary systems
- Product guide: complementary systems
Safety summary
Transportation of outdoor unit
Center of gravity
Factory-supplied accessories for RAS-12HN(P/C)
Installation space (Initial ckeck)
- Basic sizes
- RAS-(2-2.5)HVNP / RAS-3HVNC
- RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C)
Place provision
- Place provision for RAS-(2-2.5)HVNP / RAS-3HVNC
- Place provision for RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C)
Optional parts and installation
- Optional parts and installation for RAS-(2-2.5)HVNP / RAS-3HVNC
- Optional parts and installation RAS-3HVNPE / RAS-(4-6)H(V)NCE
- Optional parts and installation RAS-(4-6)H(V)NPE / RAS-(8-10)HN(P/C)E
- Optional parts and installation RAS-12HN(P/C)
General notes before performing pipe work
- Piping Materials
- Three principles on refrigerant piping work
- Suspension of refrigerant piping
- Brazing work
Piping connection for outdoor unit
- RAS-(2-2.5)HVNP / RAS-3HVNC
- RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C)
- Outdoor unit stop valve
Refrigerant piping range
- Refrigerant piping length
- Piping system for header branch
- Piping system for line branch
- Combinations of piping size and piping length
- Refrigerant piping size and multikit/distributor selection
- System installation
- Connecting flare adapter
Refrigerant charge
- Caution of the pressure by check joint
- Refrigerant charge quantity
Caution in case of refrigerant leakage
- Maximum permitted concentration of hydrofluorocarbon (HFC)
- Calculation of refrigerant concentration
- Countermeasure for refrigerant leakage
Piping work for compatibility with the piping of current installations where is used R22 or R407C.
- Installation procedure for existing pipes
- When existing Air-Conditioner is a product of another manufacturer
- Permissible range for existing Air-Conditioning Pipes (Pipe length in the case of “without cleaning process”.
- Renewal kit selection model
Drain piping
- Drain discharging boss
General notes
- General check
Electrical wiring connection for the outdoor unit
Setting the DIP switches for the outdoor unit
- Quantity and position of DIP switches
- Function of the of DIP switches and RSW switches
- Jumpers
- LED’s indication
Common wiring
- Electrical wiring between outdoor and indoor unit
- Wire size
H-LINK II system
- Features
- Specifications
- DIP Switch setting for twin, triple and quad systems
- Examples of the system of connection between H-LINK and H-LINK II units
- Examples of H-LINK II system
System Control
- Individual Operation
- Simultaneous Operation
Electrical wiring diagrams
- RAS-(2-2.5)HVNP / RAS-3HVNC (1~ 230V 50Hz)
- RAS-3HVNPE (1~ 230V 50Hz)
- RAS-(4-6)HVNPE (1~ 230V 50Hz)
- RAS-(4-6)HNPE (3N~ 400V 50Hz)
- RAS-(4-6)HVNCE (1N~ 230V 50Hz)
- RAS-(4-6)HNCE (3N~ 400V 50Hz)
- RAS-(8-10)HN(P/C)E (3N~ 400V 50Hz)
- RAS-12HNP (3N~ 400V 50Hz) - Preliminary data
- RAS-12HNC (3N~ 400V 50Hz) - Preliminary data
Device control system
Outdoor units PCB
- RAS-(2-2.5)HVNP / RAS-3HVNC
- RAS-3HVNPE
- RAS-(4-6)H(V)NPE
- RAS-(4-6)H(V)NCE
- RAS-(8-10)HN(P/C)E
- RAS-12HNP - Preliminary data
- RAS-12HNC - Preliminary data
Protection and safety control
Standard operation sequence
- Cooling operation
- Dry operation
- Heating operation
- Automatic cooling and heating operation
- Defrost operation control
Standard control functions
- Freezing protection during cooling process or dry operation
- Prevention Control for High Pressure Increase during Cooling Operation
- Prevention control for excessively high discharge gas temperature
- Activation for protection device control
- Preheating control of compressor
- Prevention control for high pressure increase
Optional input and output signals (By 7-segment display)
- Available ports
- Available optional signals
- Setting of the optional signals
- Description of optional signals
Optional functions (By 7-segment display)
- Setting of the optional functions
- Description of the optional functions
Optional functions (By remote control switch)
Checking procedure before the test run
Test run procedure using the remote control switch (PC-ART)
Test run procedure using the remote control switch (PC-ARF)
Test run procedure using the wireless remote control switch (PC-LH3A/B)
Test run procedure from the outdoor unit side
Check list
- Check list on test run
- Check list on compressor
Initial troubleshooting
- Checking by means of the 7-segment display
- Failure of the power supply to the indoor unit and the remote control switch
- Abnormal transmission between the remote control switch and the indoor unit
- Abnormal operation of the devices
Troubleshooting procedure
- Alarm display
- Alarm codes for the outdoor and indoor units
- Troubleshooting by alarm code for the outdoor and indoor units
- Alarm codes for the KPI (E/H/X)3E Series and DX Interface
Troubleshooting in check mode
- Troubleshooting using the remote controller PC-ART
- Troubleshooting using the remote controller PC-ARF
- Troubleshooting using the 7 segment display
Checking procedure for main parts
- Procedure for checking the DIP-IPM inverter for indoor and outdoor units
- Checking capacitors CB1 & CB2.
- Fault diagnosis of DC fan motor.
- Checking procedure for the electronic expansion valve for indoor and outdoor units
- Checking procedure for AC fan motor
- Checking procedure for other parts
RAS-(2-2.5)HVNP
- Cycle and structural parts
- Parts table
RAS-3HVNC
- Cycle and structural parts
- Parts table
RAS-3HVNPE
- Cycle and structural parts
- Electrical parts
- Parts name
RAS-(4-6)H(V)NPE
- Cycle and structural parts
- Electrical parts
- Parts name
RAS-(4-6)H(V)NCE
- Cycle and structural parts
- Electrical parts
- Parts name
RAS-(8-10)HN(P/C)E
- Cycle and structural parts
- Electrical parts
- Parts name
RAS-12HN(P/C)
- Cycle and structural parts
- Electrical parts
- Parts name
Introduction
Servicing for Outdoor Units RAS-(2-2.5)HVNP and RAS-3HVNC
- Removing pipe cover
- Removing front cover
- Removing outdoor fan
- Removing the compressor
- Removing high pressure switch and pressure switch for control
- Removing four-way valve coil
- Removing electronic expansion valve coil
- Removing electrical components
Servicing for Premium series
- Outdoor unit RAS-3HVNPE
- Outdoor units RAS-(4-6)H(V)NPE
- Oudoor units RAS-(8-10)HNPE
- Outdoor Units RAS-12HNP
Servicing for Standard Series
- Outdoor Units RAS-(4-6)H(V)NCE
- Outdoor Units RAS-(8-10)HNCE
- Outdoor Units RAS-12HNC
Inverter
- Specifications of inverter
- Inverter time chart
- Protective function
- Overload control
Thermistor
Electronic expansion valve
High pressure protection device
Noise filter (NF)
- Noise filter for 3N~ (400V/50Hz)
- Noise filter for 1~ (230V/50Hz)
Capacitor (CB1 CB2)
Reactor (DCL)
- Reactor (DCL) for 3N~ (400V/50Hz)
- Reactor (DCL) for 1~ (230V/50Hz)
Scroll compressor
- Reliable mechanism for low vibrating and low sound
- Principle of compression
General notes
- Checking the power source and the wiring connection
- Burnt-out compressor due to an insufficient refrigerant charge
- Insufficient cooling performance when a long piping is applied
- Abnormally high operation sound (in the ceiling type indoor unit).
- Alarm code “31”
- Not cooling well due to insufficient installation space for the outdoor unit
Maintenance work
Service and maintenance record
Service and maintenance record using the 7-segment display
Service and maintenance record by remote control switch
Pump-down method for replacing the compressor

10. Servicing

331

SMGB0079 rev.0 - 01/2013



Removing other electrical components

1 Remove the pipe cover following Removing pipe cover.

2 Remove 3 xing screws and remove the upper cover.

3 Remove the electrical box cover.

4 Removing Electrical Components.

Remove the xing screw and remove the reactor.

• To mount components be sure to match the wiring connection with the mark band codes.

1. Electrical box cover.

2. Partition plate.

3. Fuse.

4. Electrical box.

5. Reactor.

6. See the note.

N O T E

• ThePCBcannotberemovedfromtheelectricalbox.ToreplacePCBtheentireelectricalboxmustbereplaced.

• DONOTtouchelectricalcomponentswhiletheLED1(Red)isONtoavoidelectricalshock.WaituntiltheLED

turnsoff.