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Alarms
Code
Description
A1
Alarm no AS:
air temperature sensor not present or providing
a not valid value.
A2
Alarm no WS:
water temperature sensor not present or providing
a not valid value.
A3
Alarm no CS:
check sensor at the air outlet not present
(or water temp. sensor in a 4-pipe system) or providing a not valid value.
A4
Motor alarm:
overheating of the motor
(for motors with external safety protection, optional).
A5
Electric heater alarm:
check sensor temperature above the threshold,
with Electric heater ON.
A6
Check sensor alarm:
air outlet temperature not hot (in heating mode)
or cold (in cooling mode) enough.
A7
Alarm no SE:
air temperature sensor inside the remote console
not present or providing a not valid value.
A8
Configuration alarm:
wrong configuration of the parameters
or MODBUS registers.
Warnings
Code
Description
U1
TMAX warning:
water temperature in cooling mode is not cold enough.
U2
TMIN warning:
water temperature in heating mode is not warm enough.
U3
Anti-frost warning:
air temperature is too low, anti-frost function active
(heating valve activated).
U4
Connection warning:
wrong connection between remote console
and OPower card on the unit.
U5
Dirty filter warning:
the air filter is dirty and it needs to be cleaned
or replaced.
U6
Condensate pump warning:
high water level in the drain pan,
condensate pump active, cooling valve deactivated.
U7
Window open warning:
by open window, fan and valves are deactivated.
