5
CONTENTS
8) High Pressure Abnormality in Heating Operation .....................................................188
9) Refrigerant Low Pressure Abnormality .....................................................................189
10) Overheated Refrigerant Discharge Temperature in Cooling Operation .................... 190
11) Overheated Refrigerant Discharge Temperature in Heating Operation....................191
12) Communication Failure / Indoor Unit System Failure................................................ 192
13) Gas Heat Pump is Operating but Not Cooling...........................................................194
14) Gas Heat Pump is Pperating but Not Heating...........................................................196
4. Procedure for Inspection and Treatment ............................................. 198
1) Check Power Supply System....................................................................................198
2) Check Control Unit....................................................................................................198
3) Locate Electric Leakage Positions............................................................................198
4) Check Remote Control System.................................................................................198
5) Inspect Starter........................................................................................................... 199
6) Inspect Starter Transformer......................................................................................199
7) Operation Check of Relay.........................................................................................200
8) Inspect Fuel Gas Pressure .......................................................................................200
9) Inspect Electromagnetic Gas Valve..........................................................................200
10) Inspect Spark Plug ....................................................................................................201
11) Inspect High Voltage Cable....................................................................................... 201
12) Inspect Igniter, etc..................................................................................................... 202
13) Compression Inspection............................................................................................ 203
14) Valve Clearance Inspection / Adjustment ................................................................. 204
15) Treatment for Compression Failure due to Carbon Deposit......................................205
16) Inspect Engine Throttle Valve / Fuel Gas Flow Control Valve...................................210
17) Inspect Air / Fuel Ratio.............................................................................................. 210
18) Check for Contact Failure at the Starter Drive System ............................................. 211
19) Inspect Exhaust Water Drain Heater.........................................................................211
20) Inspect Engine Oil Pan Heater.................................................................................. 212
21) Check Ignition Timing................................................................................................ 213
22) Check Engine Coolant Circulation ............................................................................214
23) Check Engine Coolant Amount or Leakage Location ............................................... 214
24) Inspect Engine Coolant Pump................................................................................... 215
25) Inspect Thermostat ...................................................................................................216
26) Check Engine Coolant Heat Dissipation Condition (in cooling).................................216
27) Inspect Outdoor Fan Motor .......................................................................................217
28) Inspect Engine Coolant Temperature Sensor ........................................................... 218
29) Inspect Radiator Cap ................................................................................................218
30) Check Engine Oil Amount .........................................................................................218
31) Check Engine Oil Leakage........................................................................................219
32) Check Engine Oil Consumption Amount...................................................................219
33) Inspect Oil Pressure.................................................................................................. 220
34) Inspect Engine Oil Pressure Switch .......................................................................... 220
35) Technical Data When Replacing the Refrigerant System Parts................................ 221
36) Inspect Refrigerant Pressure (Inspect Refrigerant Amount) ..................................... 222
37) Inspection Check Valve (Refrigerant Pressure Increase) .........................................222
38) Inspect Refrigerant High Pressure Switch.................................................................222
39) Inspect Refrigerant High Pressure Sensor................................................................223
40) Inspect Hot Gas Bypass Valve..................................................................................223
41) Inspect Indoor Fan Motor ..........................................................................................224
42) Inspect for Blockage in the Indoor Electronic Expansion Valve ................................ 224
43) Check Environmental Conditions (Low Intake Air Temperature) .............................. 224
44) Inspect Strainer ......................................................................................................... 224
45) Inspection Check Valve (Refrigerant Pressure Drop) ...............................................224
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