12Periodic Inspection Items
For a
<Inspection items>
Hydro unit | Frequency | Periodic inspection details | |
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1. Insulation measurement (Power source circuit/ Heater | Annually | Insulation measurement with a mega tester | |
circuit) |
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2. Power source measurement | Annually | Electronic voltage measurement: 230V ±23V | |
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3. Operation check | Annually | Hot water supply/ Heating/ Cooling operation check with | |
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| remote controller | |
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4. Refrigerant leakage/ Water leakage inspection | Annually | Visual inspection and check with a leak tester: No leakage | |
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| must be found | |
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5. Water heat exchanger inspection (Internal dirt and | Annually | Checking for water dirtiness in a closed cycle, Cleaning | |
clogging) |
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6. Inlet/ Outlet water temperature measurement | Annually | Temperature measurement: Temperature measurement | |
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| during an operation | |
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7. Circulation pump inspection | Annually | No leakage or abnormal noise must be found (Replacement | |
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| every 10 years: Charged) | |
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8. Air vent valve inspection | Annually | Water leakage, Air vent | |
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9. Expansion vessel | Annually | Visual check for charge pressure abnormality, water | |
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| leakage, or corrosion | |
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10. Heater assembly | Annually | Check for appearance damage, deformation, or loose | |
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| terminal | |
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11. Flow switch | Annually | Operation check while running | |
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12. Manometer | Annually | Water leakage, water pressure check | |
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13. Safety valve | Annually | Water leakage, Appearance check, Drainage check | |
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14. Water heat exchanger control board, Terminal block | Annually | Check for loose connector and connecting terminal | |
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Outdoor unit | Frequency | Periodic inspection details | |
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1. Insulation measurement (Power source circuit/ | Annually | Insulation measurement with a mega tester | |
Compressor) |
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2. Power source measurement | Annually | Electronic voltage measurement: 230V ±23V | |
operation) |
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3. Operation frequency (Outdoor unit operation check) | Annually | Frequency check by rated operation (See | |
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4. Refrigerant leakage inspection | Annually | Visual inspection and check connection with a leak tester: | |
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| No leakage must be found | |
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5. Air heat exchanger inspection (Dirt and clogging) | Annually | Visual inspection, Clear clogging | |
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6. Fan inspection (Scratch, damage) | Annually | Check for scratches or damages to the fan or abnormal | |
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| motor sound | |
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7. Cycle parts | Annually | Operation check by trial run | |
(Compressor, | Annually |
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8. Inverter control board, Terminal block | Annually | Check for loose connector and connecting terminal | |
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Hot water cylinder |
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Frequency | Periodic inspection details | ||
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1. Insulation measurement (Power source circuit) | Annually | Insulation measurement with a mega tester | |
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2. Power source measurement | Annually | Electronic voltage measurement: 230V ±23V | |
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3. Water leakage inspection | Annually | Visual inspection for leakage: No leakage must be found | |
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4. Terminal block | Annually | Check for loose connector and connecting terminal | |
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5. Heater assembly | Annually | Check for appearance damage, deformation, or loose | |
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| terminal | |
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6. Temperature, Pressure relief valve (Specification for | Annually | Drainage check | |
UK only) |
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