17
7.3 Additional functionalities
SLAVE MODE
In case the SLAVE jumper (Fig.5.f - JP2) is short-circuited before powering the unit, the unit works in SLAVE MODE; the operating speed is determined by the
1-10V signal received at the SLAVE input. All the operating logics described in the Mode selection are ignored (paragraph 7.1).
FREE COOLING
The parameters “Desired Temperature”, “Tmax Free Heating”, “Tmin Free Cooling” (Menu 4 Bypass settings) are to be meant as follows:
“Desired Temperature” is the ambient temperature desired by the user
“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
Maintenance can be carried out by the user.
Service must be performed only by an authorized installer and in accordance with local rules and regulations .
Questions regarding installation, use, maintenance and service of the unit should be answered by your installer or place of purchase!
8 maINtENaNcE aND sErvIcE
WARNING
Make sure that specific warnings and cautions in Chapter 2 “Precautions” are carefully read, understood and applied!
Fig. 8.a
Internal components
8.1 Components list
3
1
2
4
4
5
6
7
8
8
9
1
2
3
4
5
6
7
8
9
FILTER G4, ExTRACT AIR
FILTER G4, INTAKE AIR
HEAT ExCHANGER
CONDENSATION DRAINS
THERMOSTAT
FAN, INTAKE AIR
FAN, ExHAUST AIR
CONDENSATION TRAY
TERMINAL BOx
TERMINAL BOx COVER
10
10
Содержание QR200A
Страница 23: ...23 NOTE ...