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Condition 2: Tank Heater OFF (Internal Tank Heater)
If tank temperature achieve tank thermo OFF, heat pump turn OFF, water pump turn OFF, room heater OFF and
3 ways valve switch to room side.
When tank temperature achieve heat pump ON condition, water pump ON, heat pump ON and room heater turn OFF.
Heat pump OFF condition at Tank Mode
o Tank temperature > tank water set temperature continuously for 20 seconds after heat pump thermos OFF
o Tank temperature > tank water set temperature continuously for 20 seconds after heat pump thermos OFF
due to water thermo. (Heat pump turn OFF but water pump continue ON and room heater turn ON to achieve
tank set temperature) OR
tank set temperature) OR
o Tank temperature > tank set temperature + [1°C] for continuously 20 seconds. (Heat pump OFF, water pump
OFF, room heater OFF and 3 ways valve switch to room side)
Heat pump ON condition at Tank Mode
o Tank temperature < tank water set temperature + R/C setting (Tank re-heat temp)
o Tank temperature < tank water set temperature + R/C setting (Tank re-heat temp)
(Water pump turn ON OR continue ON, heat pump ON and 3 ways valve switch to tank side or maintain at
tank side)
tank side)
Tank heater control
Internal heater only operates to tank side if Tank heater ON and backup heater is enable.
Internal heater turn ON condition:
Internal heater turn ON condition:
Tank temperature < tank set temperature AND
Heat pump thermos OFF AND
20 minutes from previous heater off AND
Internal tank heater selects USE from control panel.
Internal heater turn OFF condition:
Internal heater turn OFF condition:
Tank temperature > tank set temperature for continuously 15 seconds OR
Heat pump thermo ON OR
Mode change or operation is off by control panel.
12.1.10 Heat + Tank Mode Operation
1 3 ways valve control:
o 3 ways valve switch to room side during room heat-up interval and switch to tank side during tank heat-
up interval. Both modes will switch alternately. Tank mode is the initial running mode of Heat + Tank
mode.
mode.
2 Heat pump operation control:
o During room heat-up interval
Follow normal heating operation.
Switching to tank side depends to below cases:
Case 1:
[Previous switch from tank interval to room interval due to thermo OFF]
Switch to tank heat-up interval when Tank temp < Tank thermos ON temp (Room heat-up interval
ends)
Case
2:
[If heating operation at room side is less than 30 minutes and switch to tank side 3 times
consecutively]
Maintain at room heat-up interval regardless of the tank temperature. Switch to tank heat-up interval
only when (Room Interval Timer is complete OR Room heat pump thermo OFF) AND Tank
temperature < Tank thermo ON temperature.
temperature < Tank thermo ON temperature.
Case
3:
[Previous switch from tank interval to room interval due to tank interval timer is complete]
Maintain at room heat-up interval regardless of the tank temperature. Switch to tank heat-up interval
only when (Room Interval Timer is complete OR Room heat pump thermo OFF) AND tank
temperature < Tank thermo ON temperature.
temperature < Tank thermo ON temperature.
o During Tank heat-up interval
Tank interval is the first mode running when heat + tank mode is select.
Switch to room interval only when tank achieve tank thermo OFF OR tank heat-up interval timer is
complete.
Heat pump operates according to normal tank mode operation.
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3 Room heater control:
o During heating heat-up interval
Follow normal room heater control operation.
4 Tank heater control:
o During heating heat-up interval
Internal tank heater will not function under heating heat-up interval.
o During tank heat-up interval
Internal tank heater will turn ON after heat puMp thermo off to boil tank temperature to tank set
temperature.
o 2ways valve control is open
o Indoor water pump control:
o Indoor water pump control:
Indoor water pump always turn ON if room heat pump thermo ON OR Tank thermo ON.
12.1.11 Cool + Tank Mode Operation
1 3 ways valve control:
o 3 ways valve switch to room side during room cooling interval and switch to tank side during tank heat-up
interval. Both mode will switch alternately. Tank mode is the initial mode of cool + tank mode.
2 Heat pump operation control:
o During room heat-up interval
Follow normal cooling operation.
Switching to tank side depends to below cases:
Case
1:
[Previous switch from tank interval to room interval due to thermo OFF]
Switch to tank heat-up interval when Tank temperature < Tank Thermo ON temperature (Room
interval will ends)
Case 2:
[If cooling operation at room side is less than 30 minutes and switch to tank side for 3 times
consecutively]
Maintain at room cooling interval regardless of the tank temperature. Switch to tank heat-up interval
only when (Room Interval Timer is complete OR Room heat pump thermo OFF) AND Tank
temperature < Tank thermo ON temperature.
temperature < Tank thermo ON temperature.
Case
3:
[Previous switch from tank interval to room interval is due to tank interval timer is complete]
Maintain at room cooling interval regardless of the tank temperature. Switch to tank heat-up interval
only when (Room Interval Timer is complete OR Room heat pump thermo OFF) AND tank
temperature < Tank thermo ON temperature.
temperature < Tank thermo ON temperature.
*Tank Thermo ON temperature:
Internal Tank Heater select USE <Tank set temperature + R/C setting (Tank re-heat temperature)
Others
<Tank water set temperature + R/C setting (Tank re-heat temperature)
o During tank heat-up interval
Tank interval is the first mode running when the cool + tank mode is select.
Switch to room interval only when tank achieve tank thermo OFF OR tank heat-up interval timer is
complete.
Heat pump operates according to normal tank mode operation.
3 Room heater control:
o During room cooling interval
Room heater is OFF and not operates.
4 Tank heater control:
o During room cooling interval
Internal tank heater will not function under room cooling interval.
o During tank heat-up interval
Internal tank heater will turn ON after heat pump thermos off to boil tank temperature to tank set
temperature.
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5 2 ways vale is close.
6 Indoor water pump control:
o Indoor water pump always turn ON if room heat pump thermo ON OR Tank thermo ON.
12.1.12 Outdoor Fan Motor Operation
Outdoor fan motor is adjusted according to operation condition. It starts when compressor starts operation and it
stops 30 seconds after compressor stops operation.
stops 30 seconds after compressor stops operation.
30 sec
Compressor:
ON
ON
Fan Speed
ON
ON
OFF
OFF
Outdoor Fan:
12.2 Water Pump
12.2.1 Water Pump Control
Once the indoor unit is ON, the water pump will be ON immediately and no error judgment for 70 seconds.
However, during this 70 seconds operation, if there is any abnormality cause at outdoor or malfunction, the
compressor should be OFF immediately and restart delay after 3 minutes.
compressor should be OFF immediately and restart delay after 3 minutes.
The system will start checking on the water flow level after operation start for 70 seconds. If water flow level is
detected low continuously 60 seconds, the water pump and the compressor will be OFF permanently and
OFF/ON control panel LED will blink (H62 error occurs).
OFF/ON control panel LED will blink (H62 error occurs).
When error happens, the power has to be reset to clear the error.
If there is no error indication, the water pump shall be continuously running.
The water pump will remain ON when compressor OFF due to thermostat OFF setting is reached.
Water pump will OFF when room thermo OR tank thermo OR buffer tank thermo OFF.
Water pump will delay 15 seconds to turn OFF when request to OFF except during anti-freeze deice activate or
air purge mode.
Pump ON Request
YES
NO
NO
YES
ON Water Pump
OFF Water Pump
Pump ON Time
≥ 70 Sec?
YES
Water Flowrate Abnormal
> 15 Sec?
H62 Error Display
at Remote Controller
Maximum pump speed setting on remote control
Standard pump speed is automatically controlled to get the designed water temperature different between water
inlet and outlet (∆T). Instead of setting the standard pump speed, maximum pump speed is manually adjusted by
the installer according to water circuit pressure drop.
the installer according to water circuit pressure drop.
However, the following sequences do not follow maximum pump duty setting by remote control.
Pump
down
mode
Air purge mode
Normal
deice
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1) P-Q graph for different pump HEX duty
Water FlowRate. Q (L/min)
P
res
sure.
P
(k
pa
)
P - Q
12.2.2 Zone Water Pump Control
Purpose:
Water pump install at each zone to circulate the water inside each zone during buffer tank connection selected
“YES” or 2 zone systems.
Content:
AC type water pump install for this zone water pump control. When optional PCB connected, 230V output will
drive this zone pump.
There are three pump can be connected through Optional PCB. (Zone 1 Pump, Zone 2 Pump, & Pool Pump)
* Zone 1 pump [P1] use to circulate zone 1 water circuit & Zone 1 mixing valve [M1] adjust to control the Zone 1
target water temperature.
target water temperature.
* Zone 2 pump [P2] use to circulate zone 2 water circuit & Zone 2 mixing valve [M2] adjust to control the Zone 2
target water temperature.
target water temperature.
* When Pool Function select as Zone 2 circuit, [P2] use to circulate water to heat exchanger which use to transfer
heat to pool water.
heat to pool water.
* Pool pump [P3] circulates the pool water through the heat exchanger to get warm water.
Zone 1 and Zone 2 water pump start condition:
o Zone room request ON
(eg. Zone 1 thermo ON, only zone 1 pump will turn ON)
Zone 1 and Zone 2 water pump stop condition:
o Zone room request OFF
Pool water pump start condition:
o Pool Zone request ON AND
o Pool function is selected
o Pool function is selected
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