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Contents
SMGB0066 rev.0 - 12/2009
Troubleshooting
Service Manual
7
7.1. Initial troubleshooting ................................................................................................................166
7.1.1. Unit and System controller - Power Supply failure ...............................................................................166
7.1.2. Abnormal operation of the devices .......................................................................................................168
7.1.3. Incidents of operation ...........................................................................................................................174
7.2. Troubleshooting procedure .......................................................................................................175
7.2.1. Alarm code ...........................................................................................................................................177
7.3. Failure diagnosis method ..........................................................................................................216
7.4. Checking procedure for main parts ...........................................................................................218
7.4.1. RHUE-(3~6)AVHN. Procedure for checking the DIP-IPM. ...................................................................218
7.4.2. RHUE-(5/6)AHN. Procedure for checking the ISPM. ...........................................................................220
7.4.3. Checking capacitors CB1 & CB2. ........................................................................................................222
7.4.4. Fault diagnosis of DC fan motor. ..........................................................................................................223
7.5. Troubleshooting of control system ............................................................................................225
7.5.1. System controller..................................................................................................................................225
7.5.2. System MMI Pack ................................................................................................................................226
7.6. Troubleshooting of accessories .................................................................................................227
7.6.1. Pump kit ...............................................................................................................................................227
7.6.2. WEH - Water Electric Heater ................................................................................................................228
7.6.3. DHWT - Domestic Hot Water Tank .......................................................................................................228
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