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Only for training and service purposes
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Self-Diagnosis Feature
3. Self-Diagnosis Feature
3.1 Concept of ‘Classified Trouble’
• Definition of terms
- Trouble : a problem which can stop system operation, and can be resumed temporarily under limited operation
without certificated professional’s assist.
- Error : a problem which can stop system operation, and can be resumed ONLY after certificated professional’s
check.
- Emergency mode : temporary heating operation while system met Trouble
• Objective of introducing ‘Trouble’
- Not like airconditioning product, Air-to-Water heat pump is generally operating in whole winter season without
any system stopping.
- If system found some problem, which is not critical to system operating for yielding heating energy, the system
can temporarily continue in emergency mode operation with enduser’s decision.
• Classified Trouble
- Trouble is classified two levels according to the seriousness of the problem : Slight Trouble and Heavy Trouble
- Slight Trouble : a problem is found inside the indoor unit. In most case, this trouble is concerned with sensor
problems. The outdoor unit is operating under emergency mode operation condition which is
configured by DIP switch No. 4 of the indoor unit PCB.
- Heavy Trouble : a problem is found inside the outdoor unit. As the outdoor unit has problem, the emergency
mode operation is performed by electric heater located in the indoor unit.
- Option Trouble : a problem is found for option operation such as water tank heating. In this trouble, the troubled
option is assumed as if it is not installed at the system.
• Emergency operation is not automatically restarted after main electricity power is reset.
- In normal condition, the product operating information is restored and automatically restarted after main electric-
ity power is reset.
- But in emergency operation, automatic re-start is prohibited to protect the product.
- Therefore, user must restart the product after power reset when emergency operation has been running.
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