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7.3 Additional functionalities
REMOTE ENABLE
It allows to activate/deactivate the unit from remote when the CTRL-DSP is not used (e.g. in case of ModBus). To enable this
functionality, connect the HY/S1 input (Fig.5.h) removing the bridge. With open contact, DISABLED flushes on the LCD (Fig. 7b
- ).
BYPASS
The QR units are equipped with a physical bypass which allows to mitigate the heat exchange when the indoor and outdoor
temperature combinations are such that the heat exchange is not recommended. If activated the Bypass icon is displayed.
(Fig. 7b).
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. If activated, the ANTI-FROST icon is displayed (Fig. 7b).
ERRORS WARNING DISPLAYED ON THE CTRL-DSP
Code error description (Fig. 7b - )
E000 no RS485 connection between the CTRL-DSP and the motherboard
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 alarm BST input
E008 CTRL-DSP internal error
NOTE: if CTRL-DSP is absent (or faulty), the unit operates in the previously set mode.
The Weekly Timer, Night Mode and Filter Alarm functionalities do not work.
It allows to set the LCD contrast.
Press OK to enter.
Increase/decrease the contrast using
or
.
Press OK to confirm.
Installer Menu
21 Load Settings
22 Restore Default Settings
23 Contrast
24 Debug page
It shows the internal functional parameters of the unit.
Press OK to enter.
Press ESC to go back to the previous menu.
Installer Menu
21 Load Settings
22 Restore Default Settings
23 Contrast
24 Debug page
f
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Summary of Contents for QR220DE
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