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RAS-8FXG
Hitachi RAS-8FXG User Manual
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2-3
SERVICING
(2.1 Outdoor Unit)
2.1.3
Removing Fan Guard Nets
Remove four (4) screws per each fan guard net
and remove the one.
TURN OFF all power source switches.
Phillips Screwdriver
T
ool
RAS-5FSG to RAS-10FSG,
RAS-5FS3 to RAS-10FS3,
RAS-8FXG, RAS-10FXG,
RAS-8FX3, RAS-10FX3
RAS-16FSG, RAS-20FSG,
RAS-16FS3, RAS-20FS3
RAS-24FSG1, RAS-30FSG1,
RAS-24FS5, RAS-30FS5
Remove this first.
Screw
Fa
n Guard Net
Screw
Fa
n Guard Net
Screw
F
an Guard Net
142
144
Table of Contents
Default Chapter
3
Table of Contents
3
1 Troubleshooting
11
Initial Troubleshooting
11
Rotary Switch and Dip Switch Setting
11
Checking of Electrical Wiring
15
Checking by 7-Segment Display
20
Emergency Operation When Inverter Compressor Is Damaged
21
Failure of Power Supply to Indoor Unit and Remote Control Switch
23
Abnormal Transmission between Remote Control Switch and Indoor Unit
24
Abnormalities of Devices
25
Troubleshooting Procedure
33
Alarm Code Table
33
Troubleshooting by Alarm Code
34
Troubleshooting in Check Mode by Remote Control Switch
89
Troubleshooting by 7-Segment Display
95
Function of RSW, Dsws and Leds
104
Procedure of Checking each Main Parts
113
Self-Checking of Pcbs Using Remote Control Switch
113
Self-Checking of Remote Control Switch
115
Self-Checking of Indoor Unit PCB (Except For: RCI, RCD, RPI (0.8 to 5.0HP), RPC (after Alteration) and KPI)
117
Self-Checking of 7-Day Timer (PSC-3T)
119
Self-Checking of Central Station (PSC-3S1)
120
Procedure of Checking Other Main Parts
121
Check List on Compressor
133
Test Run
135
Test Run Mode by Remote Control Switch
135
Test Run Mode by Outdoor Unit
136
Checking List (FSG and FS3 Series)
137
2 Servicing
141
Outdoor Unit
141
Removing Air Intake Grille
141
Removing Front Service Panel
142
Removing Fan Guard Nets
143
Removing Outdoor Fan
144
Removing Compressor (RAS-5FSG and RAS-5FS3)
146
Removing Compressors
150
RAS-20FS3, RAS-8FXG, RAS-10FXG, RAS-8FX3 and RAS-10FX3)
150
Removing Compressors for MC1 and MC2 (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
155
Removing Compressors for MC3 and MC4 (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
159
Removing High Pressure Switch, High Pressure Sensor and Low Pressure Sensor
163
Removing Coil for Reversing Valve Coil
166
Removing Coil for Solenoid Valve Coil
167
Removing Thermistor for Liquid Pipe
168
Removing Reversing Valve (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
169
Removing Electrical Components (RAS-24FSG1, RAS-30FSG1, RAS-24FS5 and RAS-30FS5)
171
In-The-Ceiling Type (RPI-0.8FSG1 to RPI-5.0FSG1)
177
Removing Long Life Filter
177
Removing Printed Circuit Board (PCB)
177
Removing Indoor Fan and Fan Motor
179
Removing Thermistor for Liquid Piping and Gas Piping
186
Removing Electronic Expansion Valve Coil
187
Removing Float Switch
187
Removing Drain Pump
188
Removing Drain Pan
189
In-The-Ceiling Type (RPI-8FSG1 and RPI-10FSG1)
191
Removing Long Life Filter
191
Removing Printed Circuit Board (PCB)
191
Removing Indoor Fan and Fan Motor
192
Removing Electronic Expansion Valve and Thermistors
194
4-Way Cassette Type
195
Removing Long Life Filter
195
Removing Air Intake Grille
195
Removing Electrical Box Cover
196
Removing Optional Air Panel
196
Removing Fan Runner and Fan Motor
197
Removing Bell-Mouth
198
Removing Printed Circuit Board (PCB)
199
Removing Drain Pan
200
Removing Drain-Up Mechanism
201
Removing Float Switch
201
Removing Thermistors for Liquid Pipe and Gas Pipe
202
Removing Electronic Expansion Valve Coil
203
Removing Automatic Louver Motor
205
2-Way Cassette Type
206
Removing Long Life Filter and Air Intake Grille
206
Removing Electrical Box Cover
206
Removing Optional Air Panel
207
Removing Fan Runner and Fan Motor
208
Removing Printed Circuit Board (PCB)
210
Removing Float Switch
211
Removing Drain-Up Mechanism
212
Removing Drain Pan
213
Removing Thermistors for Liquid and Gas Pipes
214
Removing Electronic Expansion Valve Coil
215
Removing Automatic Louver Motor
217
Wall Type
219
Removing Air Filter
219
Removing Front Panel
220
Removing Motor for Automatic Louver
222
Removing Thermistors for Liquid Pipe, Gas Pipe, Discharge Air and Suction Air
223
Removing Electrical Box Cover
225
Removing Indoor PCB
226
Removing Drain Pan
227
Removing Heat Exchanger
228
Removing Fan and Fan Motor
230
Removing Electronic Expansion Valve Coil
232
Floor Type
234
Removing Air Intake Grille
234
Removing Air Filter
234
Removing Discharge Air Grille
235
Removing
235
Removing Fan Motor
236
Removing Printed Circuit Board (PCB)
238
Removing Thermistors for Liquid Pipe and Gas Pipe
240
Floor Concealed Type
242
Removing Air Filter
242
Removing Front Covers
242
Removing Fan Motor
243
Removing Printed Circuit Board (PCB)
243
Removing Thermistors for Liquid Pipe and Gas Pipe
243
Ceiling Type
244
Removing Air Filter and Air Intake Grille
244
Removing Side Cover
244
Removing Discharge Air Grille
245
Removing Fan Motor
246
Removing Bearing
248
Removing Coupling
248
Removing Automatic Louver Motor
249
Removing Thermistors for Liquid Pipe and Gas Pipe, and Electronic Expansion Valve Coil
249
Checking Procedures for Electronic Expansion Valve Coil
250
Removing Printed Circuit Board (PCB)
251
Total Heat Exchanger
252
Structure
252
Removing Electrical Parts
252
Removing Air Filter and Total Heat Exchanger Element
253
Removing Fan Motor
254
Air Filter Cleaning
255
Total Heat Exchanger Cleaning
255
Cleaning Indoor Unit Heat Exchanger
256
Required Tools for Cleaning (for All Indoor Units)
256
In-The-Ceiling Type
257
Cleaning 4-Way Cassette Type Indoor Unit
260
Cleaning 2-Way Cassette Type Indoor Unit
264
Cleaning Wall Type Indoor Unit
267
Cleaning Floor Type and Floor Concealed Type Indoor Unit
268
Cleaning Ceiling Type Indoor Unit
271
Collecting Refrigerant for Replacing Indoor Unit
273
3 Main Parts
275
Inverter
275
Specifications of Inverter (for 380/415V, 50Hz and 380V, 60Hz Power Source)
275
Specifications of Inverter (for 220V, 60Hz Power Source)
277
Arrangement of Inverter Power Unit
279
Inverter Time Chart
283
Protective Function
284
Overload Control
285
AC Chopper
286
Auto-Louver Mechanism
288
4-Way Cassette Type
288
2-Way Cassette Type
289
Ceiling Type
290
Scroll Compressor
291
Reliable Mechanism for Low Vibration and Low Sound
291
Principle of Compression
291
Structure
292
Thermistor
294
Thermistor for Indoor Unit
294
Thermistor for Outdoor Unit
295
Electronic Expansion Valve
297
Electronic Expansion Valve for Outdoor Units
297
Electronic Expansion Valve for Indoor Units
298
Pressure Sensor
299
High Pressure Protection Device
300
Noise Filter (NF)
301
Capacitor (CB1, CB2)
303
Reactor (DCL)
303
4 Optional Function
305
Indoor Unit
305
(For RPF(I)-FSG(E), RPK-FSGM(6), RPC-FSG1 (before Alteration) and RPI (8, 10HP) Series)
305
Remote Control ON/OFF Function
305
Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)
309
Power Supply ON/OFF 2 (Restarting Function after Power Failure)
309
Control by Field-Supplied Room Thermostat
310
Operation Control by Remote Temperature Sensor (Except for RPK-FSGM Series)
311
Cooling or Heating Operation Mode Setting Change by External Input (Level Signal Input)
311
Picking up Operation Signal
312
Indoor Unit (for RPI (0.8 to 5.0HP), RCI, RCD, RPC (after Alteration) and KPI Series)
315
Input and Output Setting of Indoor PCB Connector
315
Remote Control Thermistor Function
317
Remote Control ON/OFF Function 1
317
Power Supply ON/OFF 1 (Automatic Operation When Power Supply ON)
322
Power Supply ON/OFF 2 (Restarting Function after Power Failure)
322
Control by Field-Supplied Room Thermostat (Except for KPI Series)
323
Operation Control by Remote Temperature Sensor (Except for KPI Series)
324
Cooling or Heating Operation Mode Setting Change by External Input (Except for KPI Series)
324
Precooling/Preheating Operation (KPI Series Only)
325
Picking up Operation Signal
325
Outdoor Unit
329
Demand
331
Forced Stoppage
331
Demand Current Control (Only for 24 and 30HP)
332
Fixing Operation Mode
332
Snow Sensor
333
Defrosting Condition Changeover
334
Indoor Fan Control During Thermo-OFF at Heating
334
All Season Heating Operation
335
All Season Cooling Operation
335
Night Shift (Low Sound) Operation
336
Picking up Signals from Outdoor Unit Printed Circuit Board
337
Remote Control Switch, PC-P1H and PC-2H2
339
Name of Part
339
Simultaneous Operation
340
Operation System with Two Remote Control Switches
342
Optional Function Setting
344
Optional Functions of Remote Control Switch
347
Indication of Address (ADDS) and Refrigerant Cycle Number (RN)
351
Wireless Remote Control Switch, PC-LH3
352
Name of Part
352
Identifying of Indoor Units Installed Side by Side
353
Simultaneous Operation
354
Emergency Operation
356
Optional Function Setting (in Case of PC-RLH4, PC-RLH5 and PC-RLH7)
357
Optional Functions of Wireless Remote Control Switch
358
7-Day Timer, PSC-5T
359
Central Station, PSC-5S
360
5 Field Work Instruction
361
Burnt-Out Compressor Due to Insufficient Refrigerant Charge
361
Insufficient Cooling Performance When a Long Piping Is Applied
362
Abnormally High Operating Sound [In-The-Ceiling Type Indoor Unit]
363
Alarm Code "31
364
Not Cooling Well Due to Insufficient Installation Space for Outdoor Unit
365
Attention for SET-FREE FXG/FX3 Series
366
Select Guide of Drain Pipe for Indoor Unit
371
Caution on Refrigerant Leakage
372
Maintenance Work
374
Service & Maintenance Record by 7-Segment Display
375
Service & Maintenance Record by Remote Control Switch
376
Service & Maintenance Record
377
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Hitachi RAS-8FXG Specifications
General
Brand
Hitachi
Model
RAS-8FXG
Category
Air Conditioner
Language
English
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