9. Installation
23
THERMA V Split Type
Hydro Box Unit
9.6.2 Check List before Starting Operation
Turn off the power before changing wiring or handling unit.
No. Problem Reason Solution
1
Heating or cooling is
not satisfactory.
• Setting target
temperature is not
proper.
• Set target temperature correctly.
• Check if temperature is water-based or air-based.
See Function code 03 and 05 in Chapter 6.
• Charged water is
notenough.
• Check pressure gage and charge more water
until pressure gage is indicating 200~250 kPa.
• Water flow rate is low. • Check if strainer gathers too much particles. If so,
strainer should be cleaned.
• Check if internal water pump speed is NOT set as
‘High’. It should be set as ‘High.’
• Check if pressure gage indicates above 30 kPa.
• Check if water pipe is getting closed due to
stacked particles or lime.
2
Although electric
powersupply is OK
(remote controller
displays information),
the unit does not start
working.
• Water inlet temperature
is too high.
• If water inlet temperature is above 55 °C, the unit
does not operated for the sake of system
protection.
• Water inlet temperature
is too low.
• If water inlet temperature is below 5 °C, the unit
does not operated for the sake of system
protection. Wait while unit warms up the water
inlet temperature.
3 Water pump noise.
• Air purging is not
completely finished.
• Open the cap of air purge and charge more water
until pressure gage is indicating 200~250 kPa.
• If water does not splash out when the tip (at the
top of the hole) is pressed, then air purging is not
completed yet. If well purged, the water will
splash out like fountain.
• Water pressure is low. • Check if pressure gage indicates above 30 kPa.
• Check if the expansion tank and pressure gage
operates well.
4
Water is flood out
throughdrain hose.
• Too much water
ischarged.
• Flood out the water by opening the switch of the
safety valve until pressure gage is indicating
200~250 kPa.
• Expansion tank is
damaged.
• Replace the expansion tank.
5 DHW is not hot.
• Thermal protector
ofwater tank heater is
activated.
• Open the side panel of the DHW tank and push
the reset button of the thermal protector. (for more
detail information, please refer to installation
manual of DHW tank.)
• DHW heating is disabled.
• Push button and identify if icon is
displayed on the remote controller.
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