Panasonic WH-MXC09J3E8 Service Manual page 110

* For tank mode condition, If internal heater selected backup heater will turn ON to boil up tank water.
If external heater selected, booster heater will turn ON to boil up tank water regardless of tank heater
selection
Room Side: (Heat Mode)
1) When force heater mode start condition fulfilled, turn ON water pump and turn ON backup heater follow
below control.
2) Operate the 3 ways valve at room side only and turn ON 2 ways valve as heat mode operation.
3) Turn ON the zone pump and mixing valve if system select 2 zone system or Buffer tank connect YES, control
according to normal zone pump and mixing valve control.
4) When Force heater mode stop condition fulfilled, turn OFF heater as below condition and turn OFF water
pump after pump delay time.
Backup Heater On Condition:
a) When Force Heater Control start condition fulfill AND
b) After water pump operate 2 minute AND
c) When water outlet temperature < water set temperature + Remote Control Heater ON Setting AND
d) 20 minutes since previous Backup heater Off AND
e) Backup Heater Enable
Backup Heater Stop condition
a) Force mode off OR
b) Operation off OR
c) When water outlet temperature > water set temperature + Remote Control Heater OFF Setting for continuous
15 secs OR
* ON/OFF follow normal heater sequence.
Tank side (Tank mode)
1) When tank mode select and force heater bit received, turn ON backup heater (INTERNAL) or Booster Heater
(External) depend on the tank heater selection.
2) If tank heater selection is INTERNAL, follow normal thermo judgement to switch 3 ways valve to tank side
and room side.
3) If tank heater selection is EXTERNAL, only turn ON booster heater according to tank thermo.
Tank Heater selection is INTERNAL:
Backup Heater ON Condition:
a) After water pump operate 2 mins AND
b) When tank temperature < Tank set temperature - [Remocon Set Tank Re-heat Temp] AND
c) 20 minutes since previous backup heater OFF AND
d) Backup heater enable
Backup Heater OFF Condition:
a) Force mode OFF OR
b) When tank temperature > Tank set temperature for continuous 15 secs OR
c) Tank Operation OFF
Tank Heater selection is EXTERNAL:
Backup Heater ON Condition:
a) Force Heater mode ON AND
b) Tank temperature < tank set temperature + [Remocon Set Tank Re-heat Temp] - 1°C, AND
c) 20 minutes since previous heater off.
Backup Heater OFF Condition:
a) Tank temperature > tank set temperature for continuous 15 sec
b) Force mode OFF
c) Tank Mode Operation OFF
(During tank interval or tank mode condition, water pump and 3 ways valve will OFF)
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