background image

NOTE

Take care to follow the handling procedures below:

• Only  use  the  specified  FVC68D  PVE  oil  from  a 

sealed container.

• Immediately reseal containers of oil.

• To avoid contamination, do not return oil to original 

container  once  it  is  dispensed,  and  never  mix  it 
with other refrigerant oils.

• Do not allow PVE oil to come in contact with Styro-

foam parts. Damage may occur.

• Do not allow PVE oil to come in contact with vehi-

cle paint. Damage may occur.

• If any connection in the refrigerant loop is opened it 

should  be  closed  as  soon  as  possible  in  order  to 
minimize  the  amount  of  moisture  that  enters  the 
system.

• Any  components  that  are  replaced  should  have 

dust caps left in place until the component is ready 
to be installed in the refrigerant loop.

• Any component removed from the refrigerant loop 

should have dust caps in place as soon as possible

 

in order to minimize moisture intrusion.

Page

6 of 40

Number

PM820010

HVAC: SmartAir eHVAC System

Important Safety Notices

WARNING!

Improper  practices,  carelessness,  or  ignoring  any 
warnings may cause death, personal injury, equipment 
or property damage.

Read  and  understand  all  of  the  safety  precautions  and

 

warnings before performing any repair. This list contains 
the  general  safety  precautions  that  must  be  followed  to

 

provide  personal  safety.  Special  safety  precautions  are 
included in the procedures when they apply.

Work areas should be dry, well lit, ventilated, and be free

 

from clutter, loose tools, parts, ignition sources and haz-
ardous  substances.  Be  aware  of  hazardous  conditions 
that can exist.

• Wear protective glasses and protective shoes when 

working.

• Rotating parts can cause cuts, mutilation or strangu-

lation.

• Do not wear loose-fitting or torn clothing. Remove all 

jewelry before working.

• Before  beginning  any  repair,  disconnect  the  battery 

(negative [-] cable) from both battery boxes and dis-
charge any capacitors.

• Disconnect the air starting motor, if equipped, to pre-

vent accidental engine starting.

• Put  a  “

DO  NOT  OPERATE

”  tag  in  the  operator's 

compartment or on the controls.

• Allow the engine to cool before beginning any repair.

• Always  use  blocks  or  proper  stands  to  support  the 

vehicle or vehicle components before performing any 
service  work.  Do  not  work  on  anything  that  is  sup-
ported only by lifting jacks or a hoist.

• To  reduce  the  possibility  of  personal  injury,  use  a 

hoist or get assistance when lifting components that 
weigh 23 kg [50 lb] or more. Ensure all lifting devices 
such  as  chains,  hooks,  or  slings  are  in  good  condi-
tion and are of the correct load capacity. Make sure

 

any  lifting  devices  are  positioned  correctly.  Always 
use  a  spreader  bar  when  necessary.  The  lifting

 

hooks must not be side-loaded.

• Corrosion inhibitors and lubricating oils may contain

 

alkali.  Do  not  get  the  substance  in  eyes  and  avoid

 

prolonged or repeated contact with skin. Do not swal-
low.  In  case  of  contact,  immediately  wash  skin  with 
soap and water. In case of harmful contact, immedi-
ately contact a physician. 

Always keep any chemi-

cals OUT OF REACH OF CHILDREN

.

• Naptha and Methyl Ethyl Ketone (MEK) are flamma-

ble materials and must be used with caution. Follow

 

the  manufacturer's  instructions  to  ensure  safety 
when  using  these  materials. 

Always  keep  any 

chemicals OUT OF REACH OF CHILDREN

.

• When working on the vehicle, be alert for hot parts on 

systems that have just been turned off, exhaust gas 
flow,  and  hot  fluids  in  lines,  tubes,  and  compart-
ments.  Contact  with  any  hot  surface  may  cause 
burns.

• Always  use  tools  that  are  in  good  condition.  Make

 

sure  you  have  the  proper  understanding  of  how  to 
use  the  tools  before  performing  any  service  work. 
Use  ONLY  genuine  replacement  parts  from  PAC-
CAR.

• Always use the same fastener part number (or equiv-

alent) when replacing items. Do not use a fastener of 
lesser quality if replacements are necessary.

Summary of Contents for SmartAir eHVAC System

Page 1: ...ith the working components of the Peterbilt SmartAir eHVAC System and the proper steps and procedures to completely diagnose the Peterbilt SmartAir eHVAC System unit 2019 PACCAR Corporation Confidenti...

Page 2: ...le 10 F Discharge Temperature Sensor Freeze Switch 10 G Evaporator Blower 10 H Condenser Fan 10 I Battery Management System BMS 10 J Battery Separator 10 INTERNAL COMPONENTS 12 A High Pressure Switch...

Page 3: ...d Linear Power Module Testing 20 K Compressor Rubber Mounts 20 L Testing the Battery Management System BMS 21 M Can Bus 22 N Testing the Espar Heater Connected to the EHVAC Digital Controller 22 O Con...

Page 4: ...box 11 Figure 10 High Pressure Switch 12 Figure 11 Compressor 12 Figure 12 Thermal Limit Switch on Compressor 12 Figure 13 Evaporator Inlet Filter 12 Figure 14 Relay Testing 18 Figure 15 Service Equip...

Page 5: ...d oil manufacturers If accidental system discharge occurs ventilate work area before resuming service CAUTION The air conditioning system uses HFC134a R134a refrigerant and polyvinyl ether PVE refrige...

Page 6: ...ttery negative cable from both battery boxes and dis charge any capacitors Disconnect the air starting motor if equipped to pre vent accidental engine starting Put a DO NOT OPERATE tag in the operator...

Page 7: ...heavier than air and can accumulate near the floor in sumps and low lying areas Close the manual fuel valves prior to performing maintenance and repairs and when storing the vehi cle inside California...

Page 8: ...and Relays Units built 8 1 2016 to Present F1 Fuse 10 Amp Mini This fuse provides short circuit protection for the System control NOTE Removing fuse F1 for 10 15 seconds will reset the sys tem contro...

Page 9: ...ge to the compressor controller C Fan and Temperature Control Display LED Display Allows for temperature and Blower speed adjustment of the EHVAC Electrical Heating and Ventilation Air Condi tioning u...

Page 10: ...Figure 7 Evaporator Blower and Condenser Fan I Battery Management System BMS This device monitors the auxiliary batteries for state of charge communicates with the EHVAC system and con trols the batt...

Page 11: ...Figure 9 Battery Separator Solenoid located in the battery box Page 11 of 40 Number PM820010 HVAC SmartAir eHVAC System...

Page 12: ...Compressor C Thermal Limit Switch on Compressor This is a normally closed auto reset switch to protect the compressor from high temperature Figure 12 Thermal Limit Switch on Compressor D Evaporator I...

Page 13: ...d Unit has a low volt age disconnect of 11 2 volts 3 Check all fuses See Figure 17 Internal Wiring Diagram Before 8 1 2016 on page 28 and Figure 18 External Wiring Diagram on page 29 4 Check for 12 vo...

Page 14: ...pressor Thermal Limit Switch on page 19 7 Check evaporator blower and linear power module See J Evaporator Blower Motor and Linear Power Module Testing on page 20 8 If all tests check OK a loss of ref...

Page 15: ...d signal compressor or internal com ponent issue Amperage ranges 40 to 75 depending on settings and conditions 4 Check battery management device harness and sep arator 5 Same as 4 Unit is noisy or vib...

Page 16: ...ires and battery cables 2 Check Aux batteries for Voltage Check for heater enable signal from EHVAC unit Heater unit has a low voltage disconnect of 10 6 volts See N Testing the Espar Heater Connected...

Page 17: ...rtAir eHVAC System Heater blows cold air but no heat 1 Fuel 2 Fuel pump 3 Connections 4 Glow pin screen 5 Sensors See Espar Manual Table 2 ESPAR Heating System Diagnostic Table PROBLEM POSSIBLE CAUSE...

Page 18: ...turn the EHVAC unit on if all safety switches are okay such as the high pressure switch temperature sensor freeze switch and the compressor thermal limit switch the Main Compressor controller will con...

Page 19: ...ation on Service Instructions for Ring Terminal Controller and Compressor on page 33 You must remove the cover Do not attempt to test the controller or compressor until you have completely eliminated...

Page 20: ...tage will vary depending on requested speed approximately 1 6 for low 2 6 for high If all voltages are correct and the fan does not run it is defective and needs to be replaced Using a DC ammeter you...

Page 21: ...wiring harness With aux voltage okay LED flashing and 12 volts across pins 8 and 1 start the truck or connect the start batteries to a battery charger and bring the voltage above 13 2 for at least 15...

Page 22: ...ss still connected to control and unit back probe harness You should measure 120 ohms Reconnect the harness to the BMS With all harnesses connected you should measure 60 ohms N Testing the Espar Heate...

Page 23: ...ce unit 3 recover holding charge 4 evacuate leak test 5 recharge proper refrigerant level WARNING Before doing any of the work below be aware of the dangers involved Working with refrigerant could lea...

Page 24: ...y counterclockwise CCW 2 Connect the electronic vacuum gauge to the recov ery station at the vacuum manifold using a valve and T fittings 3 Connect the recovery stations blue hose to the ser vice port...

Page 25: ...nter the system and cause compressor damage NOTE Although your service equipment may appear physi cally different from the equipment shown here the function of the equipment used to perform each servi...

Page 26: ...ecified amount of refrigerant 2 On the recovery station set the high side valve to CLOSED and the low side valve to CHARGE 3 Press the CHARGE button to start the charge proce dure When the system is f...

Page 27: ...Table 4 Discharge Sensor Freeze Switch Testing Chart Page 27 of 40 Number PM820010 HVAC SmartAir eHVAC System...

Page 28: ...I T E GND BLACK COND SIG WHI T E HEATER CONDENSER FAN 12 VOLTS RED CANH YELLOW CANL GREEN HEATER_OPTION RED VEHICLE ACCESSORY INPUT WHI T E IGNITION INPUT WHI T E 12_VOLTS_COMP RED ACCESSORY INPUT WHI...

Page 29: ...HOLE WIRE GAUGE 2AWG WIRE GAUGE 2AWG WEBASTO FUEL OPERATED HEATER GROUND BROWN WHITE ESPAR FUEL OPERATED GROUND HEATER GROUND WHITE HEATER_OPTION RED ESPAR OPTION HEATER_EN BLACK HEATER_LVL BLUE HEAT...

Page 30: ...PLICE_SENSOR GND BLWR FUSED BLWR RLY SIG BLWR RLY SIG 12 VOLTS 12 VOLTS 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E F F THE INFORMATION HEREON IS CONFIDENTIAL AND PROPRIETARY PROPERTY OF BERGS...

Page 31: ...PWM ground switched output to control condenser fan speed 0V fan off 1 6 2 6V cooling mode Condenser fan 3 way connector C8 C9 C10 C11 C12 C13 BLWR_CTL Blue PWM ground switched output to control blow...

Page 32: ...11 14V Relay in electrical center D11 COND_RLY _SIG White Switch to Ground output to relay 1 Condenser fan power from AUX Batteries 0 5V if on otherwise 11 14V Relay in electrical center D12 BLWR_RLY...

Page 33: ...connector pins identified in FIGURE 1 After the controller with phase harness has been removed from the unit follow the below instructions to replace the phase harness W 1 Remove and retain cover 4 c...

Page 34: ...ls of new harness over threaded posts of PCB and route wires as shown Align each colored wire to specific threaded post identified only 5 Secure wire terminals with 3 nuts Torque to 12 to 14 in lbs Us...

Page 35: ...o avoid potential property damage or personal injury Read Important Safety Warnings and ALL instructions before attempting to install or service product Page 35 of 40 Number PM820010 HVAC SmartAir eHV...

Page 36: ...o avoid potential property damage or personal injury Read Important Safety Warnings and ALL instructions before attempting to install or service product Page 36 of 40 Number PM820010 HVAC SmartAir eHV...

Page 37: ...SPEED press ENTER until display shows FAN and SPEED Press up or down arrows to select 1 2 3 speed After 5 seconds selection will be set See Figure 22 Figure 22 Changing Blower Speeds ENTER Changing TE...

Page 38: ...1 02 etc Use up and down arrows to scroll through the Fault Codes See fault code chart for definitions Table 6 Fault Code List Code Failure Description Solution O1 Evaporator Sensor Shorted high or mi...

Page 39: ...open or shorted high 2 Evaporator sensor shorted low 3 High pressure switch open or shorted high Figure 26 Enter Service Mode ENTER ON OFF 13 HMI Temperature Sensor Error BLUETOOTH Controller only Sys...

Page 40: ...t Amperage draw Pressing ENTER arrow after viewing service screen will return you to the fault code screen Pressing the ON OFF button will return you to the Tem perature Display screen Figure 27 Servi...

Reviews: