Panasonic WH-SDC03H3E5 Service Manual page 99

Zone Pump Control during Anti-Freeze
Zone pump control during Zone Anti-Freeze Control:
When Zone Anti-Freeze Flag=1, Zone Pump Turn ON.
When Zone Anti-Freeze Flag=0, Zone Pump Turn OFF.
Zone pump control during Indoor Anti-Freeze Control:
Zone pump only ON/OFF if the Extension PCB connected and Buffer Tank select "NO" condition
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When Indoor Anti-Freeze flag=1, Zone Pump Turn ON
When Indoor Anti-Freeze flag=0, Zone Pump Turn OFF
* Pool Water Pump will not affected by both Indoor anti-freeze control or zone anti-freeze control.
12.2.3 Water Pump Speed Feedback Error
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Basically pump speed feedback is control by micon.
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When pump speed is below low limit or over high limit for a few seconds, micon detect pump error and system is
stopped.
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Error detection conditions:
Detect abnormal water pump speed for continuous 10 secs.
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Current pump speed < 1000 rpm or
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Current pump speed > 6000rpm for 10 seconds.
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
Control contents:
When error occurs, water pump, heating and heater is stopped for 30 seconds then restart again (Retry
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control).
When micon detect error again, system is stopped and error code [H20] is displayed at control panel.
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