Innova Stone Monoblock M1, Руководство по установке, Страница: 55 / 72

55
TROUBLESHOOTING
5�4 Troubleshooting Table
Effect Cause Solution
After the general switch-on, alarm ALRM 017 (plant flow switch
intervention) appears on the controller display
The water circulation in the plant is not good.
Check that:
• the check valves are open,
• the 3-way valve for hot-cold diversion (if present) is in the correct
position,
• there are no air bubbles inside the circuit,
• at least one of the consumers has an open circuit or is equipped with
a 3-way valve,
• the external sieve filter is not clogged,
• the plant water pressure is correct,
• the circulation pump is working properly (unlock it if necessary).
Noise and turbulence is coming from the hydraulic circuit. There is air inside the circuit.
Vent the air via the external devices and the vent on the buffer tank of
the machine.
Bring the circuit to the correct filling pressure.
Check that the suction pressure (hydraulic circuit return) with the pump
on is higher than 0.6 bar.
The alarm appears:
ALRM 025 (plant exchanger antifreeze)
ALRM 027 (domestic hot water tank antifreeze)
ALRM 028 (cooling tank antifreeze)
(the first operation is automatic reset, then manual)
The minimum frost protection temperature alarm has triggered.
The temperature of the exiting water dropped under 4 °C.
Check that nothing is preventing the good water circulation in the plant
(air, partially closed valves, clogged sieve filter, etc.).
Check that the thermal gradient between the delivery and return is
between 4-7°C. Query the t1 and t3 parameters.
Set a lower circulator speed if the thermal gradient is less than 4 °C.
If the thermal gradient is greater than 7 °C, check that all the valves on
the plant are open and if necessary add an external pump to increase the
water flow rate or insert a hydraulic separator.
The heat pump is not working. The controller display is off.
Check that the disconnector is in the I-ON position.
Check that the power supply is present.
If not, restore it.
The heat pump does not operate in heating or domestic hot water mode.
...
The auxiliary heater output has been activated but the heating element
or boiler is not active.
Check that the boiler is powered.
Cal. is shown on the controller display.
The specific Cal function has been activated that determines the exclusi-
ve operation of a boiler with the shutdown of the heat pump.
Check with the installer that the boiler is correctly activated.
The defrosting of the outdoor unit does not work and ice has formed
on the battery.
Check the minimum installation distances and remove any obstacles.
Unsatisfactory cooling or heating.
The setpoint set on the controller is too low (heating mode) or too high
(cooling mode).
Reset according to needs.
The room thermostat is set too high for cooling (or too low for heating). Adjust the temperature to a suitable value.