Cryo's YKEQ 251 GR Service Manual

Text of Cryo's YKEQ 251 GR User Guide:

• Cryo's YKEQ 251 GR, WALL MOUNTED SPLIT-TYPE AIR CONDITIONERS CONTENTS 1. IMPORTANT NOTICE 2. TECHNICAL SPECIFICATION ·····················3 3. OPERATION DETAILS 4. WIRING DIAGRAM Models SERVICE MANUAL No.TE0 50616 3 13 5 2

• Cryo's YKEQ 251 GR, IMPORTANT NOTICE This service manual is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair the appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use. The information, specifications and parameter are subject to change due to technical modification or improvement without any prior notice.

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 3 Technical Specifications Model No. YKEQ-YCNQ 251 GR YKEQ-YCNQ 331 GR Type Heat Pump Heat Pump Control type Remote Remote Rated cooling capacity Rated heating capacity EER for cooling COP for heating Moisture removal Liters/h Hig

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 4 Technical Specifications Model No. Type Control type Rated cooling capacity Rated heating capacity EER for cooling COP for heating Moisture removal Liters/h High dB(A) Med. dB(A) Indoor noise level at cooling Low dB(A) Outdoor noise level dB(A) Electrical Data Power supply Voltage Range V Cooling A Rated current Heating A Cooling W Rated input Heating W Refrigerating System Refrigerant/Charge Gram Type Model ---- LRA A ----

• 5 Note: Each mode and relevant function will be further specified in following pages. SLEEP FAN TIMER SWING ON/OFF MODE MID SWING AUTO DRY FAN HEAT COOL FEEL SLEEP TIMER ON HIGH LOW TMIER OFF The remote controller transmits signals to the system. Remote controller 1 2 4 3 5 6 7 8 8 4 MODE button FAN SPEED control button UP button (TOO COOL button) DOWN button (TOO

• YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 6 REMOTE CONTROLLER The four types of remote controller is as follow: GYKQ-05 GYKQ-10e GYKQ-11e GYKQ-12e Note: The function of remote controller above is the same.

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 7 Electronic Controller 1. Safety Control (1) Time Delay Safety Control  3 minutes delay for compressor---The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle in order to protect the compressor.  2 minutes delay for 4-way valve---The 4-way valve is ceased for 2 minutes to prevent the refrigerant-gas abnormal noise when the HEATING operation is OFF or switch to the other operation mode. (2) Indoor Pipe Temperature Sensor Frost Prevention Control When the indoor pipe temperature sensor reads 0 or below for 5 mi

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 8 Room Temp. Set TEMP. 1 Set TEMP. 1 Time More than 2 min More than 2 min More than 2 min More than 2 min More than 2 min Indoor Fan Set Speed Set Speed Set Speed Set Speed Set Speed Compressor ON OFF ON OFF ON Outdoor Fan ON OFF ON OFF ON 4. “DRY” Mode Operation (1) The system for DRY operation used the same refrigerant circle as the cooling circle. (2) When

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 9 (5) Defrost Defrosting of the outdoor heat exchange is controlled by the microprocessor with detection by the indoor pipe temperature sensor. Defrost control type is according to the JC on the PCB whether is connected.  When the JC is connect on the PCB When one of the conditions of A, Band C is satisfy, the defrosting operation stars. A. IPT--- indoor pipe temperature In the condition A, it must satisfy the conditions a), b)and c) then into defrosting operation. a) IPT1 satisfy IPT1=IPT MAX IPT 8 b) t5 50minutes(the compresso

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 10  Defrosting time chart Outdoor Fan ON OFF ON Revering Valve ON OFF ON Compressor Relay ON OFF ON OFF ON 39S 5S Defrost Count MAX 12min 19S 15S t 6. “FAN” mode operation The indoor fan motor always turns on at the set speed and the vane motor turns on at the set fettle. 7. 4-way Valve control HEATIN

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 11 motor is shut off. 10 seconds later, the electric current is applied to the fan motor again. During the fan motor lock-up, the POWER indicator lamp flashes on and off 6times/cycle or E6 to show the fan motor abnormality. 10. Auto Fan Speed Control (1) When the auto fan speed is selected, the indoor fan motor speed is automatically controlled by the room temperature and the set temperature. (2) I

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 12  Press the Timer button(‘h’ flashes).  Use the ▲▼ button to select the time at which the air conditioner must activate (between 0 and 10 hours can be set at every half hour-between 10 and 24 hours can be set at every hour).  Press the Timer button (‘h’ stops flashing) and the preset time appears in the display.  Press the Timer button again to delete the selected data from the memory. Note : If no buttons are pressed during the programming of the timer function, thee remote control will switch off automatica

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 13 this, it displays the failure and the protection is failing. You must be given the electric again to operate it. In the failure, you can operate the FAN mode.  When the outdoor protects in the COOLING or DRY, the outdoor unit stops, the indoor fan operates in set speed ; and in the HEATING, the outdoor unit stops, the indoor fan operates in cold air prevention control. The system doesn’t receive the signal of remoter controller except the signal of shut off it. When the sy

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 14 WIRING DIAGRAM MODELS: YKEQ-YCNQ 251, 331 GR INDOOR UNIT: Protecter Fan Motor Vane Motor Indoor Unit Evaporator YLW/GRN Brown Red Yellow Blue YLW/GRN Display PCB Pipe Temp. sensor Room Temp. sensor Transformer Power Supply Brown Blue PCB CN1 CN2 TH1 TH2 P2-1 P5 P4 P2-2 NO K1 COM 4 3 CN8 CN6 CN5 CN4 CN3 M M N 3 2 1 Outdoor Unit 1 2 3 N YLW/GRN Blue Yellow Red Brown OUTDOOR UNIT Compressor 4-way Vane White CM R (M) C S Blue Compressor Capacitor Red Protecter Black Brown(White) Red Yellow Blue Yellow/Green Blue Yellow/Green Outdoor UnitIn

• YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 15 WIRING DIAGRAM MODEL:YKEQ-YCNQ 531 GR INDOOR UNIT: Pipe Temp. Sensor To O.P.T PCB AC(N) Blue To The Outdoor Unit Brown Blue Yellow/Green Yellow/Green Brown Blue Yellow/Green Yellow/Green Display PCB Red Yellow Brown Relay P5 P1 P3 P4 Red White Blue Yellow FM SM SM Room Temp. Sensor Vane Motor Fan Motor Transformer CN3 P9-1 P9-2 CN5-1

• Cryo's YKEQ 251 GR, YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual 16 WIRING DIAGRM MODEL: YKEQ-YCNQ 671 GR INDOOR UNIT: SM FM SM OUTDOOR UNIT: White White Red Yellow Blue Brown YLW/GRN Blue Red Brown YLW/GRN Brown Blue Blue Brown To Power Supply To Indoor Unit Valve Coil Yellow Red C1 Fan Capacitor Blue Blue Red Compressor Capacity White C2 YLW/GRN Compressor Blue Motor Fan Motor Relay O.P.T FM FM C S R 1 2 3 N L L N YLW/GRN Blue Junction

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