User manual VAILLANT VAI 2-050 WN TECHNICAL DOSSIER

[. . . ] WALL MOUNTED UNITS Technical Dossier WALL MOUNTED UNITS VAI 2-025 WN VAI 2-035 WN VAI 2-050 WN VAI 2-065 WN ENG 2010 1- CONTENTS 1- CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2- TECHNICAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3- TEMPERATURE BY CAPACITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4- WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Inverter module has a protection function against current, voltage and temperature. If these protections happened, the unit will stop and LED display error code . When the unit is turned on at all modes, the indoor fan will operate 10 seconds later than the action of louver. 1) Preheating permitting condition: If T(outdoor ambient temperature) <3ºC and the machine connects to power supply newly or if T < 3ºC and compressor has stopped for over 3 hours, the compressor heating cable will work. ) Preheating mode: A weak current flows through the coil of compressor from the wiring terminal of compressor, then the compressor is heated without operation. 3) Preheating release condition: If T > ºC or user turns on the machine and compressor runs, preheating function will stop. 7. 4 FAN-ONLY MODE -Temperature setting function is disabled, and no setting temperature display. -The action of auto fan in fan-only mode is the same as auto fan in cooling mode with setting temperature. 17 ENG 7- PCB EXPLANATION 7. 5 COOLING MODE After starting, the operation frequency of compressor submits to following rule. ­ setting temp. ) changes, the frequency of compressor will rise or descend a grade (7 minutes after starting). After starting, if T stays in a zone for 3 minutes, the frequency will change as follow: Zone A: Current frequency rise a grade till the maximum grade F8. Zone D: Compressor stops after running as the minimum frequency F1 for 60 minutes or T is less than -ºC. If T is lower than 0ºC, the compressor stops and resumes when T>ºC. Outdoor unit current control in cooling mode(refer to the parameter table) Rating capacity test function 1) Set the indoor unit with remote controller as: high fan, 17ºC in cooling mode, then press "TURBO" button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity test mode, the buzzer will make a "di" sound for seconds continuously. Also, indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode. ) The machine will quit from the rating capacity test mode if running for hours or changing fan speed or setting temperature. ENG Turbo function(press the "TURBO" button on remote controller) 1) Elevate current frequency to a higher grade. 3) After running for 30 minutes the machine will turn back to previous setting mode. 1) In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. ) Auto fan in cooling mode acts as follow: 18 7- PCB EXPLANATION Condenser high temperature protection function(in cooling and drying mode) If T3>60ºC for seconds, compressor will stop immediately, and the machine will not resume until T3<ºC. 7. 6 DRYING MODE Indoor fan speed is fixed at breeze grade and can't be changed. Overlow room temperature protection: In drying mode, if room temperature is lower than 10, compressor will stop and not resume until room temperature climbs up to 1ºC. Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are valid, and they are the same as that in cooling mode. Horizontal louver action is the same as that in cooling mode. 7. 7 HEATING MODE Indoor fan action: 1) Anti-cold-wind function. ) If the compressor stops caused by room temperature rising, indoor fan will be forced to run 17 seconds with breeze. [. . . ] 30 minutes later, the unit will turn to normal auto mode with setting temperature ºC. In forced auto mode, the unit will run with setting temperature ºC. 7. 10 ACTION OF 4-WAY VALVE In cooling, drying, fan-only, or turning off mode, -way valve is off, while in heating mode -way valve is on. If the machine changes operation mode from heating mode to some other mode, -way valve will be delayed off minutes after compressor stop. For defrosting, please refer to the passage "defrosting mode". ENG 7- PCB EXPLANATION 7. 11 TWO SPEEDS OUTDOOR FAN FUNCTION Outdoor fan starts at the same time with compressor, but stops 30 seconds later than compressor `s stop. [. . . ]