Panasonic WH-SDC09H3E8 Service Manual page 117

12.6.2 Room Heater Operation during Deice
Purpose:
To protect the indoor Heat Exchanger from ice forming and prevent heat exchanger plate breakage.
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Control content:
This Heater protection control will activate only if the backup heater is enable at custom setup by remote
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controller. Once fulfil the start condition, room heater will turn ON together (base on max heater capacity
selection) and stop together if stop condition is fulfilled.
* If the heater is request to turn ON OLP feedback will be detected.
Starting conditions:
1. During normal deice operation 4~9
2. Water outlet temperature < 10°C or
Outdoor air temperature < -10°C or
Water inlet temperature < 27°C
Heater operates when 1 ~2 fulfilled OR When 1 and 3 ~ 4 is fulfilled.
However, this control does not relate to Heater ON/OFF button on remote control.
Stop condition:
1. When normal deice end or
2. Water outlet temperature > 45°C
However, room heater keeps ON if indoor electric heater control activate.
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