Protection Control For Heating Operation - Panasonic CS-MRE7MKE Service Manual

15.7.2. Outdoor air temperature control
• The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
This control will begin 1 minute after the compressor starts.
15.7.3. Abnormal Wiring or Piping Connection Checking Control
• 3 minutes after forced cooling operation was conducted for one room during the initial operation after power was turned on. The
abnormal wiring or piping connection control activates when:
- The outdoor gas piping temperature (connected to non operating indoor unit) drops by more than 5 C to 5 C or below 3
minutes after compressor started.
- The non operating indoor unit pipe temperature where outdoor air temperature above 5 C has dropped by more than 20 C to
5 C or lower.
- When above conditions are satisfied, the Timer LED blinks. (H41 error)

15.8. Protection Control for Heating Operation

15.8.1. Overload Protection Control
• The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown in below
figures.
15.8.2. Intake Air Temperature Control
• Compressor operating frequency changes in accordance to the outdoor air temperature.
• This control is not applicable during minimum frequency operation protection control, deice operation, pump down operation.
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