Panasonic 2WAY Multi - P11 Water Heat Exchanger Unit Anti-Icing Sensor Error

IV–88
P11 Water Heat Exchanger Unit Anti-icing Sensor Error (for only water heat exchanger unit)
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Error detection method
An error is detected as follows:
• When anti-freeze temperature is detected, and recovery temperature is not reached within 3 minutes.
* Anti-freeze temperatures (When any one of the following conditions is reached.)
Water chiller
Hot and cold water outlet temperature Less than +2°C
Anti-freeze temperature Less than +2°C
Less than 0°C
* Recovery temperature (when all conditions below are met)
Water chiller
Hot and cold water outlet temperature +4°C or more
Anti-freeze temperature +4°C or more
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Troubleshooting
1
Water heat
exchanger
unit check
1-1
Has the water chiller parameter been set despite the fact that
the unit is a brine chiller? (Proceed to 1-2 if it is being used as
a water chiller.)
Yes
Switch the power off and
repair
No 1-2
1-2 Is the cold/hot water pump shut down?
Yes
Switch on the cold/hot
water pump
No 1-3
1-3 Is the fl ow volume insuffi cient?
Yes
Maintain the correct fl ow
volume
No 1-4
1-4 Have the sensors installed properly in the correct positions?
Yes
Replace the water heat
exchanger unit’s control
board
No Repair
● For details on procedure to replace the water heat exchanger unit control board, see the instructions supplied
with the service water heat exchanger control board.
GHPtroubleshooting.indbIV‒88GHPtroubleshooting.indbIV‒88 2012/11/2611:20:132012/11/2611:20:13