Pioneer MUH-GA20VB - Manuals

Pioneer MUH-GA20VB – Manual in PDF format online.

Manuals:

Manual

Manual Pioneer MUH-GA20VB

Summary

Page 2 - TECHNICAL CHANGES

TECHNICAL CHANGES 2 1 MUH-A07YV- ➔ MUH-GA20VB- 1. Indication of capacity has been changed. (BTU base ➔ kw) 2. Dimension of outdoor unit has been changed. (780W o 540H o 255D ➔ 800W o 550H o 285D) 3. Stop valve cover has been added.4. Outdoor fan motor has been changed. (RC6V20-AB ➔ RA6V21-AD) 5. Out...

Page 3 - INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

3 Refrigeration oil Refrigerant New refrigerant R410A HFC-32: HFC-125 (50%:50%) Pseudo-azeotropic refrigerant Not included A1/A1 72.6 -51.4 1.557 64 Non combustible 0 1730 From liquid phase in cylinder Possible Incompatible oil Non Non Previous refrigerant R22 R22 (100%) Single refrigerant Included ...

Page 4 - Can R22 tools be used?; Tools dedicated for the air conditioner with R410A refrigerant

4 2.Refrigerant piping 1 SpecificationsUse the refrigerant pipes that meet the following specifications. • Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less than 0.8mm, as the pressure resistance is insufficient. Wallthickness Outs...

Page 6 - PART NAMES AND FUNCTIONS; OUTDOOR UNIT; SPECIFICATION

6 PART NAMES AND FUNCTIONS 2 ( ) Air inlet Air outlet Drain outlet Piping Drain hose back : MUH-GA20VBback and side : MUH-GA25VB MUH-GA35VB OUTDOOR UNIT MUH-GA20VB -MUH-GA25VB -MUH-GA35VB - E1 E1 E1 ACCESSORIES MUH-GA20VB-MUH-GA25VB-MUH-GA35VB- E1 E1 E1 Drain socket 1 <Outdoor unit: MUH type> ...

Page 7 - NOISE CRITERIA CURVES

7 NOISE CRITERIA CURVES 4 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATETERESHOLD OFHEARING FORCONTINUOUSNOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR BAND CENTER FREQUENCIES, Hz Test conditions, Cooling :DB35 : WB24 :...

Page 8 - OUTLINES AND DIMENSIONS

8 OUTLINES AND DIMENSIONS 5 10 69 800 302.5 500 Bolt pitch for installation 150 22.3 Handle 550 280 164.5 99.5 170.5 23 Service panel Service port 285 344.5 44 400 Air in Air out Air in 17.5 Bolt pitch for installation 304~325 40 Liquid refrigerant pipe jointRefrigerant pipe (flared) [ 6.35 Gas refr...

Page 9 - WIRING DIAGRAM; MODELS WIRING DIAGRAM; DSAR; MF

9 WIRING DIAGRAM 6 MODELS WIRING DIAGRAM SYMBOL T61 TB1,TB2 21S4 52C SYMBOL MF NR61 RT61 SR61,SR62 SYMBOL C1 C65 DSAR F61 MC NAME NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE(2A) COMPRESSOR(INNER PROTECTOR) VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TRANS FORMER TERMIN...

Page 10 - REFRIGERANT SYSTEM DIAGRAM

10 REFRIGERANT SYSTEM DIAGRAM 7 OUTDOOR UNIT (with heat insulator) Refrigerant pipe [ 9.52 4-way valve DefrostthermistorRT61 Muffler Outdoorheatexchanger Capillary tube [ 3.0x [ 1.4x700 (MUH-GA20VB) [ 3.0x [ 1.4x1000(MUH-GA25VB) [ 3.0x [ 1.4x500 (MUH-GA35VB) Capillary tube [ 3.0x [ 1.4x500 (MUH-GA20...

Page 11 - PERFORMANCE CURVES

11 Piping size O.D : mm Length of connecting pipe : m Model Refrigerant piping Max. length : m A 20 25 Indoor unit Gas 0.43 Liquid 0.5 Liquid 6.35 Gas 9.52 Outdoor unit Gas 0 Liquid 0 MUH-GA20VB - E1 MUH-GA25VB - E1 MUH-GA35VB - E1 Indoor unit w Max. Height difference 10m Height difference should be...

Page 12 - INDOOR UNIT

12 MSC-GA20VB - E1 MUH-GA20VB - E1 MUH-GA35VB - E1 MSC-GA35VB - E1 MUH-GA25VB - E1 MSC-GA25VB - E1 8.5 7.8 7.1 6.4 5.8 5.1 10.0 9.2 8.3 7.5 6.8 6.0 11.0 10.0 9.1 8.2 7.4 6.5 20.0 18.5 16.9 15.4 13.9 12.3 10.8 9.2 19.2 17.8 16.3 14.8 13.3 11.8 10.4 8.9 MSC-GA20VB - E1 MUH-GA20VB - E1 MUH-GA25VB - E1 ...

Page 14 - HEAT operation; Condition indoor:Dry bulb temperature 20.0°C

14 HEAT operation Condition indoor:Dry bulb temperature 20.0°C Wet bulb temperature 14.5°C Outdoor:Dry bulb temperature 7,15,20°C Wet bulb temperature 6,12,14.5°C 7 21 230V 5 10 15 20 25 3 4 5 6 ( : ) 7 21 230V ( : ) 5 10 15 20 25 2 3 4 5 7 21 230V 5 10 15 20 25 2 3 4 5 ( : ) Outdoor unit current (A...

Page 22 - TROUBLESHOOTING; SERVICE FUNCTIONS; -1. COMPULSORY DEFROSTING MODE FOR SERVICE

22 TROUBLESHOOTING 10 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. 2) If the electr...

Page 24 - Check of outdoor unit

24 A A Check of outdoor unit Compressor and/or outdoor fan motor doesn’t operate. Yes Compressor doesn't operate. Yes Yes Is there 230V AC between 3 on the compressor contactor (52C) and N on the outdoor terminal block (TB1)? Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION ...

Page 26 - How to check mis-wiring and serial signal error

26 D D How to check mis-wiring and serial signal error Serial signal error is indicated.(0.5-sec. ON, 0.5-sec. OFF) 1. Turn OFF the power supply (indoor/outdoor unit) and disconnect indoor and outdoor connecting wire on indoor side. 2. Short-circuit between indoor terminal block N and 3 . 3. Turn ON...

Page 27 - Check of outdoor thermistor

27 E E Check of outdoor thermistor Measure resistance between CN 661 1 and 2 . No Yes Replace the thermistor. Defrost thermistor (RT61) Reconnect CN661.Turn ON the power supply and press the EMERGENCY OPERATION switch. Is the resistance of thermistor normal? No Yes Does the unit operate 10 minutes o...

Page 29 - DISASSEMBLY INSTRUCTIONS; Removing the cabinet; Photo 1

29 DISASSEMBLY INSTRUCTIONS 11 MUH-GA20VB - MUH-GA25VB - MUH-GA35VB - OUTDOOR UNIT E1 E1 E1 OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the top panel.(2) Remove the screw of the service panel.(3) Remove the screws of the cabinet.(4) Remove the screws of the front pane...

Page 30 - OPERATING PROCEDURE; Photo 4

30 3. Removing the propeller and the outdoor fan motor (1) Remove the cabinet. (Refer to 1.)(2) Remove the propeller nut.(3) Remove the propeller.NOTE : Loose the propeller in the rotating direction for removal.When attaching the propeller, align the mark on thepropeller and the motor shaft cut sect...

Page 31 - Removing the compressor

31 OPERATING PROCEDURE PHOTOS 4. Removing the compressor (1) Remove the cabinet. (Refer to 1.)(2) Remove the relay panel.(3) Remove the soundproof felt.(4) Remove the terminal cover on the compressor.(5) Disconnect lead wires from the glass terminal of the com- pressor. (6) Recover gas from the refr...

Page 32 - PARTS LIST

32 PARTS LIST 12 22 3 5 2 21 1 ( W ) 15 12-1. OUTDOOR UNIT STRUCTURAL PARTS MUH-GA20VB - MUH-GA25VB - MUH-GA35VB - E1 E1 E1 4 17 14 19 20 18 13 6 7 8 9 10 11 12 16 23 ( W ) This figure shows MUH-GA20VB. 24 OB387-2.qxp 05.2.21 10:03 AM Page 32