Self-Diagnosis Feature; Concept Of 'Classified Trouble - LG Therma V ZHBW056A0 Service Manual

2. Self-Diagnosis Feature

2. Self-Diagnosis Feature

2.1 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 operating in emergency mode 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 : 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 Main
PCB Assembly 1.
- Heavy trouble : As the outdoor unit has problem, the emergency mode operation is performed by electric
heater.
- 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
electricity 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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