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12.10 Force Heater Mode
Purpose:
-
As a backup heat source when heat pump error. Force heater Mode only control backup heater to heat up
the room circuit only.
Start condition:
-
Force heater request ON by user during error
AND
(Force Heater mode can be operate regardless of mode selection, but indoor force remote control run heat
mode)
-
During Error Happen (exclude the error list below)
Error List which not allow Force Heater operation
H12
Capacity Mismatch
H95
Abnormal Voltage Connection
H75
Abnormal Low Water Temperature
H70
Abnormal Back-up Heater OLP
H20
Abnormal Water Pump
F37
Abnormal Water Inlet sensor
H76
Indoor-Remote Controller Communication Error
H74
PCB Communication Error
H62
Abnormal Water Flow
F45
Abnormal Water Outlet sensor
Stop condition:
-
Force Heater request OFF
OR
-
Operation OFF request
OR
-
Mode change request
OR
-
Power reset
OR
-
Error of above list happens during force heater operation.
Control contents:
1) When force heater mode start condition fulfilled, turn ON water pump and turn ON room 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 systems 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.
Room heater ON condition:
a) When Force Heater Control start condition fulfill
AND
b) After water pump operate 1.2 minutes
AND
c) When water outlet temperature < water set tempe [-8°C]
AND
d) 20 minutes since previous Backup heater Off
Room heater Stop condition:
a) Force mode off
OR
b) Operation off
OR
c) When water outlet temperature > water set tempe [-2°C] for continuous 15 seconds.
* ON/OFF follow normal heater sequence.
** Do not operate room heater at the following situation:
a) Water outlet temperature sensor and water inlet sensor abnormal.
b) Water Flowrate abnormal detect.
c) Circulation pump stop condition.
