Alternative Outdoor Ambient Sensor Control; Force Dhw Mode - Panasonic WH-MXC16J9E8 Service Manual

13.15 Alternative Outdoor Ambient Sensor Control

Purpose of the Alternative Outdoor Ambient Sensor:

It is some possibility that the air to water heat pump unit will install at a location where the original ambient sensor
is expose to direct sunlight. Therefore, another optional ambient sensor can be connect to indoor PCB and locate
at new and better reading location to improve the heat pump performance.
Control Detail:

Remocon can select either the extra outdoor ambient sensor is connected or not. (YES/NO)

The alternative outdoor ambient sensor will connect to indoor unit main PCB terminal.
when alternative sensor select NO
o
Original Outdoor temperature sensor will use for Indoor & Outdoor heat pump operation reference sensor.
-
Data communication direction : OUTDOOR send outdoor temperature reading to INDOOR.
-
Error judge : OUTDOOR will judge the original outdoor sensor error (F36 display if error detect). No
-
judge error on alternative outdoor sensor
when alternative sensor select YES
o
Alternative Outdoor temperature sensor will use for Indoor & Outdoor heat pump operation reference
-
sensor.
Data communication direction : INDOOR send outdoor temperature reading to OUTDOOR.
-
Error judge : INDOOR will judge the Extra outdoor sensor error only after operation ON request received
-
from remocon.
(F36 display if error detect). No judge error on original outdoor sensor.

13.16 Force DHW mode

Purpose:
When user want to use hot water now, user can press this force DWH mode under the quick menu to operate tank
only mode to boil up the tank temperature.
Remocon setting:
Force DHW function can be activate under quick menu.
Control Content:

When press the Force DHW function during operation OFF condition:
When receive this Force DHW bit from remocon, indoor will run tank only mode regardless of the mode
o
selection.
After tank temperature achieve tank thermo off temperature, turn OFF force DHW bit and return to operation
o
OFF with previous mode selection.

When press the Force DHW function during operation ON condition:
When receive this Force DHW bit from remocon, indoor will memories the running mode and run tank only
o
mode regardless of the mode selection.
After tank temperature achieve tank thermo off temperature, turn OFF force DHW bit and return to previous
o
memories running mode.
* when operation OFF or mode change request from remocon during force DHW mode operation, End force
DHW mode and follow the new request operation.
* Once receive force DHW mode from remocon, indoor direct start tank mode and consider tank thermo ON.
Thermo OFF only when achieve tank thermo OFF depend on the Tank System Setting.
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