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113 

65°C

Time

Tank Temp.

Tank Water Set Temp.

Backup

Heater

Operation

Heat Pump

Operation

 

  To enable the base pan heater function, control panel initial setting has to be manually adjusted by activating 

Base Pan Heater menu. 

  There are 2 optional start condition can be selected, Type A or Type B. 

 Control 

details: 

1  Type A: (Default Auto Mode) 

Start conditions: 

o  When outdoor air temperature ≤ 3°C during heating and deice operation is ON. 

 
Control contents: 

o  Base pan heater is ON during deice operation and continues ON for 10 minutes after deice operation 

ends. 

 
Cancel condition: 

o  When outdoor temperature > 6°C after deice end or 
o  When operation is not at heating mode or 
o  Base pan heater ON timer count is completed. 

 

2  Type B: (ON Mode) 

Start conditions: 

o  When outdoor air temperature is ≤ 5°C and operates in heating mode, base pan heater is ON. 

 
Cancel conditions: 

o  When outdoor air temperature is > 7°C or 
o  When operation is not at heating mode. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

114 

Purpose of Force Heater Mode 

-  As a backup heat source when heat pump error. Force heater Mode control backup heater to heat up the 

room circuit, and turn ON back up heater or booster heater to boil up tank water base on the tank heater 
selection (internal or external) 

Force Heater Control start condition: 

-  Force heater request ON by user OR auto turn ON by remote controller during error AND 

(Force Heater mode can be operate regardless of mode selection, remocon will send the lastest mode 
selection and force bit to indoor. Indoor will judge to turn ON heater to room side if it is heat mode selected, 
and turn ON heater to heat up tank water base on tank heater selection) 

-  During Error Happen (exclude the error list below) 

 

Error List not allow Force Heater Operation 
 

H12 

  Capacity Mismatch 

H76 

  Indoor-Remote Controller Communication Error 

H20 

  Abnormal Water Pump 

H95 

  Abnormal Voltage Connection 

H62 

  Abnormal Water Flow 

F37 

  Abnormal Water Inlet sensor 

H70 

  Abnormal Back-up Heater OLP 

F45 

  Abnormal Water Outlet sensor 

H74 

  PCB Communication Error 

 

  [ When tank mode operate with external heater selected & tank heater select ON] 

H72 

  Abnormal tank sensor 

H91 

  Abnormal tank heater OLP 

 
Force Heater Control Stop Condition: 

-  Force Heater request OFF OR 
-  Operation OFF request OR 
- Power 

reset 

OR 

-  Error of above list happens during force heater operation. 

 
Control contents: 

1)  After fulfil start condition, indoor will operate the force heater operation according to below mode condition 
 

Heat mode Only 

:  Turn ON backup heater to achieve room heat pump target water temperature. 

 

Heat + Tank mode 

:  Turn ON backup heater to heat up room OR Turn ON Heater to Boil up tank water. 

 

Cool mode Only  

:  Water pump and backup heater will OFF in force heater mode 

 

Cool + Tank mode 

:  Operate pump and internal Heater OR External heater to Boil up tank water. 

 

Tank mode Only 

:  Operate pump and internal Heater OR External heater to Boil up tank water. 

 

* For heat mode condition, backup heater will only turn ON if the backup heater is enable regardless of Room 

 

  Heater Selection 

 

* 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 + [-4°C] 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 + [-2°C] for continuous 15 secs OR 

* ON/OFF follow normal heater sequence. 

115 

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) 

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) 

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

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

o  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. 

  Start condition 

o  Powerful function is select by remote control. 

  End Condition 

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

116 

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. 

 Purpose: 

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

 

 Remote 

control 

setting 

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

 

 Start 

condition 

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

 

 Stop 

condition 

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

once tank achieve boiling set temperature OR 

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

 

 Control 

content: 

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

temperature. 

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

achieve the boiling set temperature. 

o  Sterilization operation will end when stop condition is fulfill. 
o  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.