Panasonic WH-UD03JE5, Service Manual, Page: 155 / 278

155
o
Boiler signal turns OFF when
 Outdoor ambient > Outdoor Ambient Set + [2°C] OR
 Heat pump not operates at tank side. OR
 Boiler prohibit flag = 1
Boiler prohibit flag control
Purpose:
o
For product safety. Boiler signal is OFF when water temperature is too high.
Start condition:
o
Water outlet ≥ 85°C continues for 5 minutes.
o
Water inlet ≥ 85°C continues for 5 minutes.
o
Zone1 water temp ≥ 75°C continues for 5 minutes.
o
Zone2 water temp ≥ 75°C continues for 5 minutes.
Contents:

After start condition fulfilled, set boiler prohibit flag = 1
Cancel condition:
o
After 30 minutes from start condition fulfilled.
Contents:
 Set boiler prohibit flag = 0
14.21 External Room Thermostat Control (Optional)
Purpose:
1 Better room temperature control to fulfill different temperature request by external room thermostat.
Recommended external room thermostat:
Maker Characteristic
Siemen (REV200) Touch panel
Siemen (RAA20) Analog
Connection of external room thermostat:
Wire Connection and thermo characteristic of Siemen REV200:
Setting L/L1 (H) Heat Thermo L/L2 (C) Cool Thermo
Set Temp < Actual Temp Open Circuit OFF Short Circuit ON
Set Temp > Actual Temp Short Circuit ON Open Circuit OFF
Cooling
Heating
Siemen REV200
Connect only heating line for heating only model. And connect both
heating and cooling line for heat + cool model.
Indoor Unit
9 L (label)
10
11
12
L1 (label)
L2 (label)
9 : Terminal Board No.
Wire Connection and thermo characteristic of Siemen RAA20:
Setting L/Y1 (H) Heat Thermo L/Y2 (C) Cool Thermo
Set Temp < Actual Temp Open Circuit OFF Short Circuit ON
Set Temp > Actual Temp Short Circuit ON Open Circuit OFF