Models 347002K/177002K/34900/347012K Monifold Block Style
Contents
1. 61 E an 9 642 ZC Sma om x m O 08 010 12 014 15 017 020 i 2 l 023 l FAN MOT 62 N a N KR Original 1 01 Page 22 1 01 347002K 177002K 34900 Series Manifold Block Style Service Manual 34900 lll 10018 SNOILVIOT ONIANNOYI 08 10 1 09 ama 9 00 90 351 NMOA NMOA INST 0845 Page 23 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual 34900 5 3HHW SESI INEAN MOTHA2. INST 0846 24 Original 1 01 347002K 177002K 34900 Series Manifold Block Style Service Manual 34901 0193 09 8 10 1 02 23 3349 meo N 71 INST 0850 25 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual 34901 5 5 BIN 3 4 4119 4 8 w THERMAL BROWN BLUE SHIELD SCALE ASSY INST 0851 Page 26 347002K 177002K 34900 Series Manifold Block Style Original 1 01 177002K Circuit Board and Key Pad Functions Recover Initializes the recovery process Vacuum Initializes the vacuum process Charge Initializes the charging process Start Starts a process after if has been initialized or paused Stop Stop or pauses a process after it has been started Inject Oil When pressed and held will energized the oil injection solenoid Menu When pressed will allow you to scroll through different options by using
3. Hm N i poog D s Cm O Cm O _ 15 DIA 3 N lt 5 gt gt gt Sla 2 4 2 gt 2 IN La E MORO PONMYT O S N INST 0720 Page 10 347002K 177002K 34900 Series Manifold Block Style Original 1 01 347002K 177002K Wire Diagram INST 0840 Page 11 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual Wiring Diagram 100V 110V 347002K 177002K 0 TANK 5019 SSY IL RETRN 0 OIL DRAIN SHIELD I
4. lt SAR 4 z INST 0843 Page 20 347002K 177002K 34900 Series Manifold Block Style Original 1 01 Control Panel Assembly 34900 45 494 j 221 RECOVER VACUUM CHARGE START STOP A 717 J 420 A INJECT MENU 75 919 E LEAR ENTER 44 O Ky INST 0844 21 poog 5 INST 0720 34900 t Board 19739 347002K 177002K 34900 Series Manifold Block Style Service Manual ircui C N T Ta i a m pas m s O 78 8 g m gt 5 2 ZEN CN N 4 O 19 i i CO 1 ON
5. VALVE Stops oil from entering into the recovery system during oil injection 113025 CHECK VALVE Stops refrigerant from entering into the oil injection bottle during the charging and recovery process 122917 Pneumatic Connector 119983 Coupling Page 6 347002K 177002K 34900 Series Manifold Block Style Original 1 01 347002K 177002K Component Location INST 0837 7 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual 34 Control Panel 347002K 177002K N 35 36 38 39 Seo Z No Se gt 7 Z Yd A 11215 516 11819 9 RECOVER VACUUM T START STOP 4 Z A 37 MENU OIL
6. one nearby Always unplug the station fram the power source before removing any of the shrouding or beginning any service work To order parts please FAX your order to 1 800 222 7805 service related questions should be directed to Robinair Inside Sales and Service at 1 800 822 5561 Page 2 347002K 177002K 34900 Series Manifold Block Style Original 1 01 Non operational If you have to remove any lines components from the high side of unit so very carefully as there 15 way to recover the refrigerant from the high side of this unit 1 Disconnect the high and low side service hoses from vehicle on 134A units Make sure the coupler valves are closed 2 Open the filter access door and remove the IS V access panel 3 Close the Liquid Vapor and Purge valves on the ISV If a source tank 15 installed on unit close the supply valve 4 Disconnect the wires off the Recovery Recycling and Oil return Solenoids Take a cheater cord with a power switch and attach it to these three solenoids Connect an auxiliary recovery unit up to compressor test port Turn the power switch on the cheater cord to on Start the auxiliary recovery unit and allow it to pull down and shut off Turn the power switch on the cheater cord off Discon nect the cheater cord and reconnect the correct wires to the correct solenoids Disconnect the auxili
7. Calibrate Scale Follow the on screen prompts to re calibrate scales Set Tank Tare Should always say 17 40 158 Step Test Allows the unit outputs to be tested for operation The screen will display which component is being energized Key Pad Test Will run the operator through an operation where every button the keypad will be tested Set Charge Offset Usually set at 70 unless extremely long hoses being used and then the amount of refrigerant left in hoses will have to be calculated Download Program Factory use only UL Trip Point Apply 43 165 to scale assembly and adjust the p 1 pot so the display reads set Remove 1 16 and set should go to clear Prepare Board Test Board house use only Prepare To Ship Resets board memory Installation Routine Will allow you to set the unit up as if it was new with pulling a vacuum on the IS V Page 27 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual Troubleshooting WILL NOT RECOVER Compressor runs 1 If the unit is being run through an extension cord eliminate its use Disconnect 96 service hoses from vehicle Open the manifold valve on control panel then push recover If the pressure on the gauges drop while in the clear mode check for voltage at the recovery solenoid If voltage is present replaced main board If voltage is not present rebuild the recovery sole noid Remove the oil d
8. 6 Be sure the scale is unobstructed 7 Check for 110 volts to the charging solenoid If there is no voltage check the wires for continuity If the wires have continuity replace the main board If there is proper voltage to the solenoid rebuild the solenoid or replace the coil if necessary 8 everything else passes then replace the scale or main board 9 If a partial charge occurs close the high side valve start the vehicle and pull in the remaining charge on the low side of the system When the remaining charge has been pulled from the tank the charging solenoid should close preventing a possible overcharge Page 32 347002K 177002K 34900 Series Manifold Block Style Original 1 01 Function Test NOTE The recovery tank must have at least 10 pounds of refrigerant in it to perform this test 1 Turn on the Main Power switch 2 Pressurize the high and low side hoses with refrigerant 3 Install a gauge to the compressor service port 4 Verify that all tank hoses are properly attached to the recovery tank 5 Open all tank valves 6 Press RECOVER The compressor will start the display will read CL L and the low side gauge will pull into 13 44 bar vacuum NOTE The system gauges should not lose pressure during CL L 7 Upon reaching a 19 44 bar vacuum the recov ery solenoid will automatically open and the test gauge should re ressurize The comp
9. 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 120867 113160 CASTER 112776 3 AMP FUSE Protects the power trans former 121341 TANK FILL HOSE Hose used to transfer virgin refrigerant into the IS V 19739 CIRCUIT Controls tions unit 68296 R12 LOW SIDE HOSE Low side service hose to the vehicle 68396A 12 HIGH SIDE HOSE High side service hose to the vehicle 40083 GASKET OF 6 Replaced the gasket on the non quick seal end of service hose 18451 QUICK SEAL REPAIR Repairs the quick seal end of hose 10237A AUTO ADAPTER KIT Allows access to the R12 air conditioning system 62096 R134A LOW SIDE HOSE Provides flow from the low side coupler to the low side port 18190A LOW SIDE SERVICE COUPLER Allow access to the low side of the of the 134A system 63096 R134A HIGH SIDE HOSE Provides flow from the high side coupler to the high side port 18191A HIGH SHIDE SERVICE COUPLER Allows access to the high side of the 134A system 19115 REPLACEMENT O RING FOR HIGH amp LOW SIDE SERVICE COUPLERS front o ring 17772 O RING BETWEEN THE SERVICE COUPLER AND THE 14MM BARB 40302 ACME QUICK SEAL REPAIR Repairs the quick seal end of hose RA19504
10. CLEAR ENTER gt INST 0698 220 z INST 0853 Page 8 347002K 177002K 34900 Series Manifold Block Style Original 1 01 65 Oil Assembly When Recovery is complete recycle solenoid opens and allows the accumulator to fill to 16 psi This is controlled by the oil drain pressure switch When the switch reads 16 psi it will open the oil drain solenoid and allow the oil to drain When the switch reads a pressure of a 9 psi for 3 seconds it will shut the oil drain solenoid and now the recovery process is complete If auto restat is on the unit will tehn do after this is completed the recovery solenoid opens for 5 minutes and monitors the vacuum switch looking for a positive pressure If pressure is detected unit will recover this pressure then moniter the pressure for another 2 minutes The unit will repeate this process unitll there is no longer a pressure rise INST 0838 Vacuum Pump 66 347002 177002 9 347002K 177002K 34900 Series Manifold Block Style Service Manual Original 1 01 t Board RA19739 347002 8 m m Cm
11. circuit board Replace the scale if previous attempts failed 5 Replace the main board if replacing the scale does not correct the problem Page 28 347002K 177002K 34900 Series Manifold Block Style Original 1 01 Troubleshooting Display Reads HIGH PRESSURE 1 Check to be sure both tank valves are open and the hoses are accessing the tank Check the tank pressure If the pressure exceeds 435 psi 30 bar release the pressure down to 200 psi 14 bar through the vapor port Then do a manual recycle Check the 15 amp circuit breaker on back of the back of the unit by pressing the white button and making sure that it is latched in If the breaker is latched in the check it for continuity and If the continuity is not present then replace breaker Check the high pressure cutout for continuity between pins 1 amp 3 If pins have continuity verify proper wire connections and replace main board if necessary pins 1 amp 2 have continuity there is an obstruction in the discharge line or the high pressure switch is bad If there is no continuity between any pins replace the high pressure switch Inspect the discharge check valve for obstructions and verify that the discharge line is clear Display Reads SCALE OR CAL 1 2 Remove all weight from the scale platform Check the scale cable to be sure it is properly connected to the main boar
12. the blue up and down arrow buttons to access one of the follow push start to activate unless stated otherwise then to lock the option in you will push stop Change Filter Sets the unit to run in the filter change mode Recycle Set the unit to run in the recycle mode Tank Fill Sets the unit to run in the tank fill process will automatically stop when 15 lbs of charge able weight is in the ISV Vacuum Pump Hours Shows how many hours are on the pump oil After oil has been changed you will need to 0 the timer by pushing the clear button Dryer Recovered Hours Displays the amount of refrigerant that has been recovered through the filter drier After oil has been changed you will need to 0 the timer by pushing the clear button Advanced Basic Prompts Allows you to choose from very little on screen help basic to full on screen help telling you when to connect and disconnect hoses what buttons to push and so on Auto Restart If activated turned on unit will watch for a pressure rise during the five minute waiting period If pressure is detected the unit will restart recover it will continue doing this until there is no pressure rise detected Units weight Will allow you to choose between English amp Metric units Language Allows the display to read in English Spanish French or German Change Defaults Accessed by entering 8 7 8 7 then enter Then you will gain access to the following options
13. 77002K 121173 122909 Air purge Inlet 7 121172 121967 Compressor discharge Page 15 Original 1 01 347002K 177002K 34900 Series Manifold Block Style Service Manual Flow Diagram Flow Representaion OH 1 SOLENOID 4 VACUUM PUMP OIL DRAIN SWITCH CUI 0U OIL DRAIN Q gt SOLENOID 24 VAPOR Sag purge UD FURGE Sy 1 x A RECOVERY FAN COMPRESSOR el a C N 5 I ZING INST 0727 Page 16 347002K 177002K 34900 Series Manifold Block Style Service Manual Original 1 01 1 RA19624 Manifold 347002K 177002 34900 g Z Z Z z 13 L N wi 15 4 14 eee oe INST 0842 Page 17 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manu
14. NST 0702 Page 12 347002K 177002K 34900 Series Manifold Block Style Service Manual Original 1 01 220 Volt 347012K GROUND LEAD NNE 10 UNIT GROUND STUD E FY Pee UU 1 4 INST 0848 13 Original 1 01 347002K 177002K 34900 Series Manifold Block Style Service Manual 220 Volt 347012K PRESS swe OIL DRAIN SHIELD INST 0849 Page 14 347002K 177002K 34900 Series Manifold Block Style Original 1 01 Plumbing Diagram 347002K 177002K 34900 OIL INJECTOR ASS Y N 0p 982 5 41 Se AIR PURGE PORT op 8 VAPOR PORT INTERNAL 2 Ne N RA 2 INST 0841 34900 34 177002K Description 121169 121968 Compressor suction 121171 121966 Compressor Oil Return 0 121314 121969 System Oil Drain 120225 120225 Oil Injection Tube 121314 121961 Tank Fill Hose 120225 Injection Tube 120220 121773 Oil Drain Tube 34900 34 1
15. RA19392 34900 LOW SIDE GAUGE Allows the 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 user to monitor pressure the low side of the system being serviced RA19393 34900 HIGH SIDE GAUGE Allows the user to monitor pressure on the high side of the A C system being serviced RA19626 34900 KEYPAD Allows the user to input what process they want the unit to operate in 19672 OIL DRAIN SWITCH Used during the automatic oil drain process works off of pressure allows the pressure in the accum oil separator to build up tol6 psi then drain down to 9 psi When installing this switch in a 34900 remove the 1 4 flare fitting from the then installs the switch 121771 PNEUMATIC FITTING 111161 ELBOW 121312 042 ORIFICE RA19297 OIL DRAIN SWITCH Controls the oil drain process after recovery 111858 1 8 1 8 1 8 MP T 121152 MALE QUICK CONNECT 121153 FEMALE QUICK CONNECT 110646 LOCK WASHER 121449 CAP 117663 5 16 TUBE CUT TO LENGTH 120225 OD TUBE 3 36 120225 1 OD TUBE 1 33 16 120225 OD TUBE 1 127 112699 O RING RA19006 RA 19088 SOLENOID RA19258 RE BUILD KIT Normally closed electrical valve that opens when the circuit board send voltage to it 19282 CHECK VALVE Stop refrigerant from reentering the A C system after recove
16. ROBINAIR Service pray i k ge T Models 347002K 177002K 34900 347012K Manifold Block Style Recovery Recycling Recharging Unit For R 12 or R 134a Only TABLE OF CONTENTS Theory of Operation and Safety Precautions 2 Depressurizing the Unit 2 Component 4 Component Locations 7 177002 Circuit Board and Key Pad Functions 27 Troubleshoot Ssnin 28 Testa naa nn ua ua 33 33 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual Theory of Operation and Safety Precautions The 177002K amp 177012K recovery recycling evacuation and recharging units are designed for R 12 refrigerant only These units are UL approved and meet SAF J1991 standards The 347002K and 34900 recovery recycling evacuation and recharging units are designed for R 134A refrigerant only These units are UL approved and meet SAE 72210 72099 standards DEPRESSURIZING UNIT Operational If you have to remove any lines or components from the high side of unit do so very carefully as there is no way to recover the refrigerant from the high side of this unit 1 Disconnect the high and low side service hoses from vehicle on 134A units make sure the coupler valves are clos
17. SION VALVE Controls the flow of refrigerant into the inlet oil separator to keep it from being flooded with refrigerant RA18752 VACUUM SWITCH Normally closed switch that opens at 13 in hg and stops the recovery process recycle and tank fit 19429 VACUUM PROTECTION SWITCH Normally open switch 25 psi and opens at 10 psi If the switch is closed it will not allow the vacuum pump to start This is indicated by a Pressure Exists Press Recovery Key message Also will stop you from try to recovering an A C system with a possible leak in it indicated by a Low System Pressure message RA19427 RA 19763 25 bar TUV approved HIGH PRESSURE SWITCH Normally closed between 12 13 14 15 16 17 18 19 20 21 22 23 24 connections 1 amp 3 during normal operations When the pressure reaches 435 psi 10 psi the switch will then close the connections RECOVERY CHECK VALVE Stops refrigerant from flowing back out the unit after a recovery is completed and during the vacuum recycle process 34724 RECOVERY FILTER Removes moisture from the refrigerant being recovered from the A C system INLET OIL SEPARATOR Removes the oil out of the refrigerant being recovered from the A C system COMPRESSOR OIL SEPARATOR Removes the compressor oil from the refrigerant that is leaving the compressor RA19743 RA19595 R134A AIR PURGE Removes excessive air from th
18. al Flow Diagram A Block Representation 347002K 177002K 34900 MANIFOLD CONTROL PANEL VACUUM PUMP lt 7 2 AIR PURGE gt 24 2 lt FROM AIR PURGE TANK 1 So RAIN I LOWER BLOCK JESCRIPTIO PRESSUR J VACUUM PROTECTION 153 DRAIN FUNCTION SOLENOID RECOVER VACUUM RECYCLE CHARGE Fil 0 X 0 0 3 X 0 0 5 0 0 4 0 0 0 X X 5 0 x 7 OIL RETURN 0 0 0 8 F 0 0 0 14 DRAIN 0 0 0 16 AIR PURGE 0 0 0 0 65 OIL INJECT 0 0 0 0 X INST 0703 Page 18 347002K 177002K 34900 Series Manifold Block Style Original 1 01 Component Location 34900 20 7 INST 0746 19 Original 1 01 347002K 177002K 34900 Series Manifold Block Style Service Manual NOTE OBSERVE FLOW DIRECTION ON CHECK VALVE u 4 _ J Z 62 63 5 S
19. ary recovery unit from the compres sor test port Pictorial View of the Depressurizing Unit OIL RETURN INST0852 Page 3 Original 1 01 347002K 177002K 34900 Series Manifold Block Style Service Manual 10 11 Component Descriptions 110 volt 220 volt 19624 19766 MANIFOLD ASSEMBLY RA19491 RA19492 Replacement 110 volt 220 volt coils for all solenoids RA19258 VACUUM SOLENOID Normally closed electrical switch that when energized allow a vacuum to be pulled and the A C system being serviced 19258 SOLENOID Normally closed electrical switch that when energized allow the refrigerant to be removed form the A C system being serviced RA19258 CHARGE SOLENOID Normally closed electrical switch that when energized allows the A C system to be refilled with new or recycled refrigerant RA19258 RECYCLE SOLENOID Normally closed electrical switch that when energized allows refrigerant to be ran in a loop through the recovery filter RA19258 ADD SOLENOID Normally closed electrical switch that when energized allows refrigerant to be moved from the virgin tank of refrigerant to the ISV 19258 EQUALIZATION SOLENOID Normally closed electrical switch that when energized allows the oil in the compressor oil separator to be returned to the compressor RA19529 EXPAN
20. c fittings for leaks Check for proper vacuum oil level in the vacuum pump sight glass oil level should be in the center of the sight glass while the pump is running Replace vacuum pump oil if necessary Check for suction at the intake of the pump If there is none replace the pump Remove the shroud and look for loose wires to the vacuum solenoid Check for voltage to the vacuum solenoid If 110 volts are present rebuild the solenoid If 110 volts are not present check the wires for proper connec tion and continuity If the wires have continuity replace the main board Page 29 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual Troubleshooting UNIT WILL NOT EVACUATE Continued Display reads U HI 1 If there is more than 25 psi 1 7 bar at the in let recover before evacuating If pressure on the gauges raised above 0 hg after recovery is com pleted replace the inlet check valve If there is less than 25 psi 1 7 bar at the inlet check the vacuum pump protection switch for continuity If the switch has continuity replace it If the switch does not have continuity check the wire harness and replace if necessary If U HI remains the display replace the main board Vacuum pump does not run 1 If the unit is being run through an extension cord eliminate its use Verify that the pump is plugged in Check the vo
21. d Check the scale calibration and recalibrate if necessary Replace the scale if previous attempts failed Replace the main board if replacing the scale does not correct the problem Display Reads CH F 1 2 The CH F message means the filter has had the maximum amount of refrigerant ran through the filter and it is time to change the filter After the filter if the CH F message remains on the display replace the main board Display Reads CH P If there is less than 25 psi 1 7 bar at the inlet check the vacuum pump protection switch has continuity press HOLD CONT to continue recovery If after pressing the hold cont button the unit does not continue the recovery process test the keypad for proper function If the keypad has proper func tion replace the main board If there is more than 25 psi 1 7 bar at the inlet check the vacuum pump protection switch for continuity and if it has none replace it If the vacuum pump protection switch does have continu ity check the wires for proper connection to the main board and replace either component if neces sary UNIT WILL NOT EVACUATE Vacuum pump runs 1 Ifthe unit being run through extension cord eliminate its use Verify that the manifold gauge valves are open Check the low side gauge for proper operation and calibration Be sure the plastic vacuum line is snug at both ends and not obstructed Check the pneumati
22. e recovery tank 19744 19770 R12 AIR PURGE Removes excessive air from the recovery tank RA19596 TRANSFORMER Takes line voltage and steps it down to 12 volts RA17282 RA17324 RELAY Electrically controlled switch that when energized will start either the compres sor or the vacuum pump depending on which on it energized RA19612 RA19764 350 PSI Relief ISV Storage vessel that the recovered and recycled refrigerant is stored 19593 SCALE 34900 Electronic strain gauge that sends a signal up to the circuit board to display the amount of weight in the tank RA17416 RA17516 FAN Cool the compressor electrical components so that it does not shut don on thermal overload 19458 19762 COMPRESSOR Moves the refrigerant from the A C system being serviced to the storage tank on the unit RA17419 OIL BOTTLE Catches the used oil during the oil drain or holds the new oil to be injected into the A C system being serviced RA19524 WHEEL Page 4 347002K 177002K 34900 Series Manifold Block Style Original 1 01 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Component Descriptions RA19056 TANK STRAP Secures virgin tank to unit RA19603 SCALE Electronic strain gauge that sends a signal up to the circuit board to display the amount of we
23. e vacuum sensor If there is continuity at the sensor inspect the wires between the main board and the vacuum sensor and replace if necessary If the wires are good replace the main board 5 If a vacuum is present at the compressor service port verify that 110 volts are being sent to the recycling solenoid If there is no voltage inspect the wires for continuity Replace the main board if the wires have continuity 6 Even though the recycling solenoid is receiving 110 volts it may not be opening Rebuild the solenoid or replace the coil if necessary 7 If there is still a vacuum in the low side of the unit replace the expansion valve WILL NOT PERFORM AN AIR PURGE NOTE The air purge solenoid does not receive power NOTE For the first 30 seconds of recycling and will only receive voltage for a maximum of 10 minutes 1 Verify that the recovery tank has excess air pres sure in it Check the pressure in the tank in relation ship to the temperature of the refrigerant The air purge device requires at least 7 psi 48 bar of excess pressure to open If excess air pressure is confirmed verify that all tank hoses are properly connected to the tank If the hoses are connected correctly check and make sure that there is flow coming out of the unit air purge port on the ISV If this is all correct the check to make sure that hole in the cap on the bottom of the air purge is not plugged Start t
24. ed 2 Open the filter access door and remove the ISV access panel 3 Close the Liquid and Air Purge valve on the ISV Do not shut the Vapor Valve If a source tank is installed on unit close the supply valve A 10 11 WARNING Turn the main power switch on and then start a recover Allow the unit to pull down and shut off When the unit shuts off press the menu button then scroll down to tank fill and start this process Allow the unit to pull down and shut off When the unit shuts off press the menu button then scroll down to Recycle and start this process Allow the unit to pull down and shut off When the unit is done recycling close the vapor valve on the IS V Connect a recovery unit up to compressor test port Push the menu button then scroll down until change defaults is displayed then push 8 7 8 7 and then enter Scroll down to step test then push start Press the start button twice so that the oil return solenoid 15 energized Start the second recover unit up and allow it to finish removing the rest of the refrigerant from the low side and the compressor return oil separator of the recovery unit to be repaired Always wear safety goggles when working with refrigerants Contact with refrigerant can cause eye injury Disconnect lines and hoses with extreme caution Pressurized refrigerant be present in lines and hoses Always point lines and hoses away fram you and
25. expansion valve does not adjust to allow flow replace the expansion valve Check the filter for flow obstructions Verify that the equalization solenoid is not receiving power If the equalization solenoid is voltage check the solenoid for internal bleed through Repair if necessary If the compressor is not running verify that voltage is being supplied to the compressor If it is not receiving voltage check the wiring and the com pressor relay for proper operation If the compressor is receiving voltage but is not running inspect the compressor start components and check the amp draw Replace the compressor as necessary If the compressor is running check the compressor suction and discharge pressures as well as the oil level Page 30 347002K 177002K 34900 Series Manifold Block Style Service Manual Original 1 01 Troubleshooting WILL NOT RECYCLE Continued RECYCLE 15 off 1 Check that all tank hoses are properly installed and the tank valves are completely open 2 Verify that there is a minimum of 10 pounds 4 5 kilograms of refrigerant in the tank 3 Install the low side of a manifold gauge set to the service port located at the oil drain 4 If positive pressure is present at the service port compressor service port look for loose wires to the vacuum sensor If the wires are not loose check for continuity on the vacuum sensor If there is no continuity replace th
26. he unit in the recycling process While recycling for at least three minutes verify that 110 volts are being supplied the air purge solenoid If it is not getting 110 volts inspect the wires for conti nuity Repair or replace as necessary If the wires have continuity replace the main board If the solenoid is receiving 110 volts rebuild the solenoid or replace the coil if necessary If the air purge solenoid is operating properly Page 31 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual Troubleshooting replace the air purge device WILL NOT PERFORM AN AIR PURGE Continued WILL NOT CHARGE NOTE There is no component that pumps refrigerant into a system during the charge process The refriger ant flows in by a pressure transfer If the system is not in a vacuum this unit will not charge 1 If the unit is being run through an extension cord eliminate its use 2 Check that all tank hoses are properly installed and the tank valves are completely open 3 Verify that the manifold valves are completely open and unobstructed 4 If CHECK REFRIGERANT is on the display verify that there is a minimum of 10 pounds 4 5 kilo grams of refrigerant in the tank If there is enough refrigerant in the tank check scale calibration and recalibrate 5 Verify that the main board has accepted the pro grammed amount Test the operation of the keypad replace if necessary
27. ight in the tank 19181 IEC RECEPTACLE Power cord plugs into this and supplies power to the main power switch RA19047 RECEPTACLE Supplies power to the vacuum pump RA17549 15 AMP RA9759 7 5 AMP CIRCUIT BREAKER Protects unit from drawing too much amperage and shorting electrical components out RA17548 3 AMP RA 19760 1 5 AMP CIRCUIT BREAKER Protects the power transformer 19631 CASTER 19676 PNEUMATIC WHEEL RA15425 15630 VACUUM Two stage 6 cfm rotary pump designed to pull moisture and air from an system 347002k 177002k CONTROL PANEL ASSEMBLY Contains the components for the user to operate the unit RA19613 134 19742 R12 LOW SIDE GAUGE Allows the user to monitor pressure on the low side of the A C system being serviced RA19614 R134a RA19742 R12 HIGH SIDE GAUGE Allows the user to monitor pressure on the high side of the A C system being serviced RA19343 MAIN POWER SWITCH Controls power to the circuit board relays and transformer 19739 CIRCUIT BOARD Controls the opera tions of the unit RA19675 34700 KEYPAD Allows the user to input what process they want the unit to operate in 122926 CONTROL PANEL VALVE MAINFOLD Controls the flow from the A C system being serviced to the recovery unit 34900 CONTROL PANEL ASSEMBLY Contains the components for the user to operate the unit
28. ion and discharge pressures see page 15 Replace the compressor as necessary Compressor does not run 1 If the unit is being run through an extension cord eliminate its use If the display does not respond to keypad com mands verify that the keypad is plugged in If there is still no response replace the keypad If the keypad is functioning properly you will hear a tone when you press a key If the keypad is functioning properly remove the shroud and verify proper wire harness connections Check for 110 volts to the coil of the compressor relay pins 0 amp 1 If there is no voltage check the wires from the main board to the compressor relay for continuity If they have continuity replace the main board If the compressor relay is receiving 110 volts to the coil check for voltage from the 4 contact of the relay to the ground If there is poor compressor voltage replace the relay If voltage is present at the compressor jumper the thermals overload If the compressor runs check the compressor amp draw If it is drawing higher than 6 amps or not running replace the compres sor If the compressor is cool and drawing low amperage replace the thermal overload Display Reads FULL 1 Check the tank weight replace the tank if it is full Check scale calibration and if necessary Adjust the UL circuit by adjusting the P1 pot located on the
29. ltage at the pump proper voltage is present be sure that the pump is not overfilled with oil if it is drain the pump start and properly refill the pump lf proper voltage is present and the pump still will not start replace the pump proper voltage is not present remove the shroud inspect the wiring for proper connections Check for 110 volts to the coil of the vacuum pump relay pins 0 amp 1 If there is no voltage check the wires between the vacuum pump relay and the main board for continuity If the wires have continu ity replace the main board If there is voltage at the vacuum pump relay coil replace the relay If the vacuum pump relay is energized receiving 110 volts check for voltage from the 4 contact to the ground with a voltmeter If there is poor voltage replace the vacuum pump relay WILL NOT RECYCLE RECYCLE promptis on 1 10 Check that all tank hoses are properly installed and the tank valves are completely open Verify that there is a minimum of 10 pounds 4 5 kilograms of refrigerant in the tank Verify that the oil drain solenoid in not allowing the unit to pull air in through the oil drain tube Install the low side of a manifold gauge set to the compressor service port to verify that the expan sion valve is set at 35 psi 2 4 bar Adjust the expansion valve if necessary If the low side of the unit is in a vacuum and the
30. nd external lines and fittings while the unit finishes recycling 15 After 15 minutes the vacuum procedure shuts oft automatically and the display reads CPL 16 The low side manifold gauge on the control panel should hold a vacuum 17 Calibrate scale 18 Calibrate UL circuit 19 Press charge button to enter into the program charge screen 20 Press charge then charging solenoid will energize until the programmed weight is removed from the scale 21 Program a 20 pound 10 kilogram charge into the main board then press start 22 Recover the remaining pressure from the high and low side hoses LABOR RATES Robinair authorizes 1 hour charge to troubleshoot leak test and complete a full function test on units that are covered under factory warranty The authorized time for parts replacement is 15 minutes per part If repairs are estimated to exceed two hours prior autho rization from Robinair is required NOTE Robinair considers filters and fuses to be a consumable item and they are not covered under warranty This includes parts and labor Page 33
31. rain bottle and check to if it is pulling air in through the oil drain port If air is being pulled in through the oil drain port check for voltage at the oil drain solenoid If voltage is present change the board If voltage is not present rebuild oil drain solenoid Connect gauge to the compressor service port Start recovery process it should start in clearing watch pressures on gauge if it reaches 15 51 bar and the unit does not go to recovery test the vacuum sensor for continuity If the switch has continuity then it is stuck in the close position replaced switch See part 9 for description If the vacuum switch does not reach a 15 51 bar close liquid valve on ISV if the gauge then pulls down and switches over to recover check the recycling solenoid for voltage If voltage is present replace board If voltage is not present rebuild recycling solenoid Inspect the filter for flow obstructions and check for leaks around the gasket area Verify that the equalization solenoid is not receiving power NOTE The equalization solenoid is a normally closed solenoid If it is receiving power check for proper wire connection and proper board installation If the wires are connected to their corresponding pins replace the main board Check the equalization solenoid for bleed through to the suction side of the compressor Rebuild the solenoid if it is bleeding through Check the compressor suct
32. ressor will now pull system gauges into a 13 44 bar vacuum and the unit should shut off 8 The test gauge will build positive pressure and a pressure transfer should be heard This is the result ofthe equalization solenoid opening for twenty seconds and returning oil to the compressor If no pressure rise occurs the equalization solenoid must be inspected for obstructions and or voltage 9 Press VACUUM The vacuum pump will start VACUUM will appear on the display and the timer will begin to count down from 15 00 minutes 10 After 6 seconds the compressor recycling solenoid and vacuum solenoid will energize The control panel gauges will pull into a deep vacuum and the unit will begin recycling refrigerant RECYCLE will appear on the display 11 After 30 seconds the air purge solenoid will receive 110 volts and open but will only receive this voltage for 10 minutes Once the air purge solenoid is open pressure from the tank enters the air purge device If the pressure from the tank is 7 psi 48 bar greater than the reference bulb the air purge device will open and purge this pressure down to a 3 psi 21 bar difference 12 After 5 minutes the low side gauge on the unit s control panel will be close to a 30 1 bar vacuum 13 After 10 minutes the gauge on the compressor service port should read 30 to 40 psi 2 1 to 2 8 bar Adjust the expansion valve to comply if necessary 14 Leak test all internal a
33. ry 17155 OIL DRAIN BOTTLE W FEMALE QUICK CONNECT FITTINGS 17165 OIL DRAIN BOTTLE W FEMALE amp MALE Page 5 Original 1 01 347002 177002 34900 Series Manifold Block Style Service Manual 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 Component Descriptions QUICK CONNECT FITTINGS OILINJECTION ASSEMBLY Allows the refrigera tion systems oil to be replenished DRAIN ASSEMBLY Drains oil from inlet oil separator after recovery process is complete 122850 VACUUM PUMP Two stage 6 cfm rotary pump designed to pull moisture and air from an A C system 116454 INLET COUPLING 116274 O RING 122912 PNEUMATIC FITTING 122899 SOLENOID Allows the pump to open up to the atmosphere after the evacuation process 112870 ELBOW 110392 ADAPTER 121784 PNEUM COMPRESS ELBOW 122746 ADAPTER 110956 O RING 15731 FILLER CAP amp O RING 122222 ADAPTER 122221 SIGHT GLASS EXTENSION 117680 SIGHT GLASS 122317 O RING BUNA N 111098 FLARE 100733 HALF UNION COUPLING 112835 NIPPLE 122134 R134A AIR PURGF 122435 R12 AIR PURGE Removes excessive air from the recovery tank 121588 DRAINBOTTLE 122770 POWER CORD 121961 Hose used to transfer virgin refrigerant into the IS V 121346 DOOR BRACKET 121376 DOOR
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