Daikin EHSXB04P30D, Инструкция по установке и обслуживанию

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8 Faults and malfunctions
Installation and maintenance instructions
42
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN
Malfunction Possible cause Possible solution
Room cooler does not
cool Water flow too low.
▪ Check that all stop valves of the water circuit are fully open.
▪ Check that the water filter is dirty.
▪ Check if the expansion tank is defective.
▪ Completely vent the heating system and the internal circula-
tion pump.
▪ On the controller [→ Main menu → Info → Overview
→ Psyst], check that sufficient water pressure (> 0.5 bar) is
available; if necessary, top up heating water.
▪ Check that the resistance in the water circuit is not too high
for the pump (see Chap. 10 ).
"Cooling" switched off (e.g. room thermostat re-
quests "Cooling", but switching time program is in
the economy phase, outside temperature too low). ▪ Check the operating mode setting.
▪ Check the request parameters.
▪ Check the date, time and switching time program settings on
the controller.
Refrigerant compressor is not working.
▪ With backup heater (EKBUxx) installed:
▪ Check that the backup heater heats the return flow temperat-
ure to at least 15 °C (at a low return flow temperature, the
heat pump uses the backup heater first to achieve this min-
imum return flow temperature).
▪ Check mains supply of the backup heater (EKBUxx).
▪ Thermal contactor (STB) on the backup heater (EKBUxx) has
triggered. Unlock.
The system is in the "Heating" operating mode.
▪ Switch the operating mode to "Cooling".
Outside temperature < 4 °C ▪ The heat pump has automatically switched to the "Heating"
operating mode in order to guarantee frost protection if the
outside temperature continues to fall. No room cooling pos-
sible.
Cooling output for room
cooling too low Water flow too low.
▪ Check that all stop valves of the water circuit are fully open.
▪ Check that the water filter is dirty.
▪ Check if the expansion tank is defective.
▪ Completely vent the heating system and the internal circula-
tion pump.
▪ On the controller [→ Main menu → Info → Overview
→ Psyst], check that sufficient water pressure (> 0.5 bar) is
available; if necessary, top up heating water.
▪ Check that the resistance in the water circuit is not too high
for the pump.
Water volume in heating system too low.
▪ Check the admission pressure in the expansion tank and wa-
ter pressure; if necessary, top up the heating water and adjust
the admission pressure.
Refrigerant quantity in the heating system too low or
too high. ▪ Determine causes of too low or too high refrigerant quantity in
the refrigerant circuit.
▪ If the refrigerant quantity is too low, check the refrigerant
circuit for leaks, repair and add refrigerant.
▪ If the refrigerant quantity is too high, recycle the refrigerant
and refill the system with the correct quantity.