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FSG Series
Hitachi FSG Series Service Manual
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Service Manual
"SET-FREE"
FSG/FS3
Outdoor Units:
5 ~ 20 HP
Indoor Units
T
ype:
• In-the-Ceiling
• 4-W
a
y Cassette
• 2-W
a
y Cassette
•
W
all
• Floor
• Floor Concealed
• Ceiling
•
T
otal Heat Exchangers
2
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
5
Initial Troubleshooting
9
Rotary Switch and Dip Switch Setting
9
Checking of Electrical Wiring
13
Checking by 7-Segment Display
14
Emergency Operation When Inverter Compressor Is Damaged
15
Failure of Power Supply to Indoor Unit and Remote Control Switch
16
Abnormal Transmission between Remote Control Switch and Indoor Unit
17
Abnormalities of Devices
18
Troubleshooting Procedure
26
Alarm Code Table
26
Troubleshooting by Alarm Code
27
Troubleshooting in Check Mode by Remote Control Switch
70
Function of Rsw, Dsw and Leds
84
Procedure of Checking each Main Parts
90
Self Checking of Pcbs Using Remote Control Switch
90
Self-Checking of Remote Control Switch
92
Self-Checking of Indoor Unit Pcb
94
Self - Checking of 7 - Day Timer (Psc-3T)
96
Self - Checking of Central Station (Psc-3S1)
97
Procedure of Cheching Other Main Parts
98
Test Run
109
Test Run Mode Remote Control Switch
109
Test Run from Outdoor Unit Side
110
Checking List (Fsg and Fs3 Series)
111
2 Servicing
115
Outdoor Unit
115
Removing Air Intake Grille
115
Removing Front Service Panel
115
Removing Fan Guard Nets
115
Removing Outdoor Fan
116
Removing Compressor (Ras-5Fsg and Fs3)
117
Removing Compressors (Ras-8Fsg, Ras-10Fsg, Ras-16Fsg, Ras-20Fsg, Ras-8Fs3, Ras-10Fs3, Ras-16Fs3 and Ras-20Fs3)
119
Removing High Pressure Switch, High Pressure Sensor and Low Pressure Sensor
121
Removing Coil for Reversing Valve
123
Removing Coil for Solenoid Valve
123
Removing Thermistor for Liquid Pipe
123
Removing Reversing Valve
124
Removing Electrical Components
125
IN-THE-CEILING TYPE (Models: RPI-0.8FSGE, RPI-1.0FSGE, RPI1.5FSGE,RPI-2.0FSGE, RPI- 2.5FSGE, RPI-3.0FSGE, RPI-4.0FSGE and RPI-5.0FSGE)
126
Removing Printed Circuit Board (Pcb)
126
Removing Indoor Fan Motor
127
Removing Thermistors for Liquid Pipe and Gas Pipe
128
Removing Float Switch
128
4-Way Cassette Type
129
Removing Long Life Filter
129
Removing Intake Air Grille
129
Removing Electrical Box Cover
129
Removing Optional Air Panel
129
Removing Turbo Fan and Fan Motor
130
Removing Printed Circuit Board (Pcb)
131
Removing Float Switch
132
Removing Drain-Up Mechanism
132
Removing Drain Pan
133
Removing Thermistors for Liquid Pipe and Gas Pipe
134
Removing Expansion Valve Coil
134
Removing Automatic Louver Motor
135
2-Way Cassette Type
136
Removing Long Life Filter
136
Removing Intake Air Grille
136
Removing Electrical Box Cover
137
Removing Optional Air Panel
137
Removing Fan Motor
138
Removing Bearing
139
Removing Coupling
139
Removing Printed Circuit Board (Pcb)
139
Removing Float Switch
140
Removing Drain-Up Mechanism
140
Removing Drain Pan
140
Removing Thermistors for Liquid and Gas Pipes
141
Removing Electronic Expansion Valve Coil
141
Removing Motor for Automatic Louver
142
Wall Type
142
Removing Air Filter
142
Removing Front Panel
143
Removing Motor for Automatic Louver
144
Removing Thermistors for Liquid Pipe, Gas Pipe, Discharge Air and Suction Air
144
Removing Electrical Box Cover
145
Removing Indoor Pcb
146
Removing Drain Pan
146
Removing Heat Exchanger
146
Removing Fan and Fan Motor
147
Removing Electronic Expansion Valve Coil
148
Floor Type
149
Removing Intake Air Grille
149
Removing Air Filter
150
Removing Discharge Air Grille
150
Removing Front Cover
150
Removing Fan Motor
150
Removing Printed Circuit Board (Pcb)
151
Removing Thermistors for Liquid Pipe and Gas Pipe
152
Floor Concealed Type
153
Removing Air Filter
153
Removing Front Covers
154
Removing Fan Motor
154
Removing Printed Circuit Board (Pcb)
154
Removing Thermistors for Liquid Pipe and Gas Pipe
154
Ceiling Type
155
Removing Air Filter
155
Removing Side Cover
155
Removing Discharge Air Grille
155
Removing Fan Motor
156
Removing Bearing
157
Removing Coupling
158
Removing Automatic Louver Motor
158
Removing Thermistors for Liquid Pipe and Gas Pipe
158
Removing Printed Circuit Board (Pcb)
159
Total Heat Exchanger
159
Removing Air Filter
159
Removing Total Heat Exchanging Rotor
160
Removing Air Supply Fan Assembly and Exhaust Fan Assembly
160
Cleaning Indoor Unit Heat Exchanger
161
Required Tools for Cleaning (for All Indoor Units)
161
Cleaning 4-Way Cassette Type Indoor Unit
163
Cleaning 2-Way Cassette Type Indoor Unit
166
Cleaning Wall Type Indoor Unit
168
Cleaning Floor Type and Floor Concealed Type Indoor Unit
168
Cleaning Ceiling Type Indoor Unit
170
Removing Remote Controller
171
Removing Remote Control Switch
171
Collecting Refrigerant for Replacing Indoor Unit
172
3 Main Parts
173
Inverter
173
Calculation of Operating Frequency
173
Specifications of Inverter
174
Arrangement of Inverter Power Unit
176
Protective Function
179
Thermistor
180
Resistance Value of Thermistor
181
Electronic Expansion Valve
183
Electronic Expansion Valve for Outdoor Units
183
Electronic Expansion Valve for Indoor Units
184
Pressure Sensor
185
Noise Filter
186
Capacitor
188
Reactor (Dcl)
188
Circuit Diagram for Printed Circuit Board of Outdoor Unit
191
Circuit Diagram for Printed Circuit Board of Indoor Unit
195
Circuit Diagram for Printed Circuit Board of Remote Control Switch
197
Circuit Diagram for Printed Circuit Board of Receiver
199
4 Optional Function
201
Indoor Unit
201
Remote Control On/Off Function
201
Power Supply On/Off 1 (Automatic Operation When Power Supply On)
203
Power Supply On/Off 2 (Restarting Function after Power Failure)
203
Control by Field-Supplied Room Thermostat
203
Operation Control by Remote Temperature Sensor
204
Cooling or Heating Operation Mode Setting Change by External Input (Level Signal Input)
204
Picking up Operation Signal
205
Outdoor Unit
206
Demand
207
Forced Stoppage
207
Fixing Operation Mode
208
Snow Sensor
208
Defrosting Condition Changeover
209
Indoor Fan Control During Thermo-Off at Heating
209
All Season Heating Operation
209
All Season Cooling Operation
210
Night Shift (Low Sound) Operation
210
Picking up Signals from Outdoor Unit Printed Circuit Board
211
Remote Control Switch (Pc-2H2)
212
Name of Parts
212
Simultaneous Operation
213
Operation System with Two Remote Control Switches
214
Optional Function Setting
214
Optional Functions of Remote Control Switch
216
Indication of Address (Adds) and Refrigerant Cycle Number (Rn)
218
Optional Wireless Remote Control Switch, Pc-Lh3
219
Name of Parts
219
Identifying of Indoor Units Installed Side by Side
220
Simultaneous Operation
220
Emergency Operation
222
Optional Function Setting
222
Optional Functions of Wireless Remote Control Switch
223
7-Day Timer (Psc-3T)
224
Name of Parts
224
Operation Procedure for Running Pattern
225
Operation Procedure for Operation Pattern
225
Optional Central Station (Psc-3S1)
226
Name of Parts
226
System
227
Operation Procedure for Central Station
229
5 Field Work Instruction
231
Burnt-Out Compressor Due to Insufficient Refrigerant Charge
231
Insufficient Cooling Performance When a Long Piping Is Applied
231
Abnormally High Operating Sound (In-The-Ceiling Type Indoor Unit)
232
Alarm Code "31
232
Not Cooling Well Due to Insufficient Installation Space for Outdoor Unit
233
Select Guide of Drain Pipe for Indoor Unit
234
Caution on Refrigerant Leakage
234
Maintenance Work
235
Service & Maintenance Record
236
Service & Maintenance Record by 7-Segment Display
237
Service & Maintenance Record by Remote Control Switch
238
Other manuals for Hitachi FSG Series
Technical Catalogue
424 pages
5
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Hitachi FSG Series Specifications
General
Refrigerant
R410A
Type
Split System
Power Supply
220-240V, 50Hz
Features
sleep mode
Outdoor Unit Weight
30 kg
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