15
“Tmax Free Heating” is the maximum outside temperature allowed for free heating operation
“Tmin Free Cooling” is the minimum outside temperature allowed for free cooling operation
FAULT HANDLING
Code error description (Fig.7.b - )
E000 no RS485 connection
E001 no rotation of the exhaust air fan (Fig.8.a - )
E002 no rotation of the intake air fan (Fig.8.a - )
E003 thermistor T11 broken/disconnected (Fig.7.a)
E004 thermistor T12 broken/disconnected (Fig.7.a)
E005 thermistor T21 broken/disconnected (Fig.7.a)
E006 thermistor T22 broken/disconnected (Fig.7.a)
E007 dehumidifier alarm (BST INPUT)
E008 CTRL-DSP internal error
NOTE: the controller board verifies the presence of CTRL-DSP periodically; if CTRL-DSP is absent (or faulty), the unit works in 3V mode at speed 1 (DEFAULT
condition).
ANTI-FROST
Intake Fan speed is reduced during very cold weather in order to prevent ice inside the unit which could damage the heat exchanger.
In this case the ANTI-FROST icon
is activated on the LCD.
R
7
6
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