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118 

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) 

 
 

119 

Powerful mode is use to increase the capacity of heat pump to achieve higher target temperature. Powerful mode is 
applicable when heat mode is operating. 
 
Remote control setting: 
On quick menu of remote control, there is 4 options of powerful mode can be select. 

-  OFF 

 

: Cancel powerful mode 

-  30 minutes 

: Set powerful for 30 minutes 

-  60 minutes 

: Set powerful for 60 minutes 

-  90 minutes 

: Set powerful for 90 minutes 

 
Control contents: 
During the time set by remote control, powerful will activate according to 2 shift up controls. However, this function is 
applicable only for heating. Remote control will transmit the signal to indoor unit once this function is select then 
transmit OFF signal to indoor when the timer is complete. Indoor will transmit signal to outdoor for frequency control. 

Indoor setting temperature shift 
 

  If system is standard system (Optional PCB is not connected) 

-  Target water temperature will shift up to Wlo or Whi whichever higher. 

  If system is extension system (Optional PCB is connected) 

-  Target water Zone 1 and Zone 2 temperature will shift up to Wlo or Whi whichever higher. 

* If “Direct Type” temperature control is select, this powerful shift up setting is not effective. 

-  Powerful function is select by remote control. 

-  OFF/ON button is pressed. 
-  Powerful function is OFF by remote control. 

Quiet mode is use to reduce the noise of outdoor unit by reducing the frequency or fan speed. 
 
Quiet level 
There are 3 level (Level 1, Level 2, Level 3) to set by quick menu function on remote control. 
 
Control content 
Once the quiet function is select, the remote control will transmit the signal to indoor and outdoor unit. 
 
Start condition 

-  Quiet mode is set on remote control. 
-  Quiet mode is request ON by weekly timer. 

Stop condition 
If any of below condition is achieve. 

-  OFF/ON button is pressed. 
-  Quiet mode is OFF by remote control. 
-  Quiet mode is request OFF by weekly timer. 

 

120 

Purpose: 

-  To sterilize water tank by setting the required boiling temperature. 

Remote control setting 

-  Days for sterilization function to start can be select. 
-  Time of selected day to start sterilization function. 
-  Boiling temperature (External heater is 55°C ~ 75°C, Internal heater is 55°C ~ 65°C) 
-  Maximum operation time is 5 minutes to 1 hour. 

Start condition 

-  Tank connection set to “YES” by remote control 
-  Sterilization function selects “YES”. 
-  Sterilization signal received from remote controller by timer. 
-  Tank mode request ON. 

Stop condition 

-  When boiling timer is completed. Boiling timer (Remote control set maximum operation time) start counting 

once tank achieve boiling set temperature OR 

-  After 8 hours of operation since sterilization start. 
-  Tank mode request OFF. 

Control content: 

-  During sterilization function activation time, target tank set temperature will internally change to boiling set 

temperature. 

-  During sterilization activates, heat pump and heater (external or internal) will operate as normal tank mode to 

achieve the boiling set temperature. 

-  Sterilization operation will end when stop condition is fulfill. 
-  After sterilization is complete, tank set temperature will resume to normal operation. 

* Tank temperature may not achieve boiling set temperature if tank heater is select OFF OR external compressor 
switch. 

 
 

121 

Purpose 

-  Stop provides heating to room side during high outdoor ambient condition. 

ON

OFF

Outdoor thermo off
set temperature +3°C

Outdoor thermo off
set temperature +1°C

 

 
Control content 

-  Heating outdoor ambient thermos OFF control only applicable when heat pump operate in heat mode. (This 

control will not activate when running in tank side) 

-  Heat pump and water pump will turn OFF when outdoor ambient is higher than outdoor thermo OFF set 

temperature. 

-  Heat pump thermos ON when outdoor ambient < outdoor thermos OFF set temperature + 1°C.