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TROUBLESHOOTING

Blizzard

Tur

bo Split System Manual

L-3448 ENGLISH

YSTEM

ROUBLESHOOTING

UIDE

NOTE: Internal fan (blower) is constantly on (unless in Power Saver mode); if not check all power connections.

Table 6: SYSTEM PROBLEMS AND SOLUTIONS

PROBLEM

SOLUTIONS

Unit does not operate at all. Internal fan
(blower) is not running.

1. If the Qt Control/Display is not on (all LEDs and data display window is

dark), follow instructions in the Quick Qt Control/Display Troubleshooting
Guide above.
a. Turn circuit breaker on or reset Qt Control/Display

b. Check to ensure that the Qt Control/Display is connected to a Q-Power

Logic Board (Qt Control/Display will not function with SMXII logic board)

c. Check CXP or TSEP cables and connections

d. Replace CXP or TSEP cables

e. Replace Qt Control/Display

f. Replace Q-Power Logic Board

2. If the Qt Control/Display is on, check the following:

a. Ensure that the generator is running at the correct frequency

b. Check that the batteries are fully charged

c. Check that the shorepower (if being used) is connected properly

d. Ensure the unit's circuit breaker is ON, and not tripped

e. Ensure that the inverter (if equipped) is connected properly and fuse/

breaker (DC and/or AC) is not tripped

Unit does not operate. Internal fan (blower) is
running.

1. Check that the Qt Control/Display is not in the OFF mode

2. Check the Qt Control/Display for fault/error code and follow Fault/Error

Code Troubleshooting Chart

3. Check the temperature setpoint to make sure it is sufficient for the unit to

operate in AUTO, COOL or HEAT modes

Unit does not make cold air.

1. Check the temperature setpoint to make sure it is sufficient for the unit to

cool

2. Check the evaporator air filter, clean as needed

3. Make sure switch is set to COOL

4. Make sure evaporator blower is running by checking for air flow from the

grill

5. Make sure that the condenser blower is running by checking for air flow

under the sleeper

6. Check the condenser coil while under the sleeper, clean as needed

7. Check the evaporator coil to make sure it is not frozen up (Note that

sometimes, during cool outside weather, and a low fan speed, the coil may
ice up. Turn the temperature setpoint so that the compressor cuts off and
turn the fan to maximum speed. Allow unit to defrost, then resume cooling.)

Содержание Blizzard Turbo

Страница 1: ...ithout prior written consent by Dometic Corporation Every precaution has been taken in the preparation of this manual to insure its accuracy However Dometic Corporation assumes no responsibility for errors and omission Neither is any liability assumed for damages resulting from the use of this product and information contained herein Blizzard Turbo Split System Installation and Operation Manual Do...

Страница 2: ...K START 16 QT BASIC OPERATION 17 POWER ON 17 SYSTEM OFF 17 SELECTING SETPOINT 17 DISPLAYING TEMPERATURE 17 COOL MODE 17 HEAT MODE 17 AUTO MODE 17 AUTOMATIC FAN SPEED INTERNAL AIR FLOW 17 MANUAL SPEED CONTROL 18 ADJUSTING DISPLAY BRIGHTNESS 18 PROGRAMMING QT DIGITAL CONTROL SYSTEM 18 FACTORY MEMORY RESET 18 FAHRENHEIT CELSIUS DISPLAY 18 LOW FAN SPEED ADJUSTMENT 18 HIGH FAN SPEED ADJUSTMENT 20 FAN M...

Страница 3: ...zzard Turbo is a split system that consists of two separate components see Figure 1 The outside unit contains the condenser and cooling fan It can be bolted horizontally to the underside or vertically to the back of the sleeper cab The inside unit contains the compressor heater optional evaporator blower CHEB The CHEB also houses the Power Logic Box PLB and other associated components The inside u...

Страница 4: ...for the removal of hazardous fumes or vapors should be operated at least 5 minutes before and during This safety alert symbol appears with most safety statements It means attention become alert your safety is involved Please read and abide by the message that follows the safety alert symbol DANGER Indicates a hazardous situation which if not avoided will result in death or serious injury WARNING I...

Страница 5: ...t bulkheads and decks etc and through the introduction of clean air into the living space Bear in mind that the advent of air conditioning whether it be for cooling or for heating naturally leads to the practice of closing a living space tightly Never close all windows and doors unless auxiliary ventilating systems which introduce clean outside air into the living space are used Always leave enoug...

Страница 6: ...d download the appropriate manuals before you start For APU powered systems Generator installation and operating instructions will be provided by your APU system supplier For Dometic battery powered systems A separate manual covers installation of the batteries inverter alternator regulator and other components If you do not have this manual you can download it from www dometictruck com TOOLS REQU...

Страница 7: ...fied by Dometic DO NOT ATTEMPT THIS INSTALLATION UNLESS You have experience with tools required You can safely lift weights of up to 80 pounds 36 3 kg Table 1 BLIZZARD TURBO KIT COMPONENTS NAME DESCRIPTION PART NUMBER QUANTITY CHEB Compressor Evaporator Blower assembly with Easy Start N A 1 Condenser 12V Condenser fan N A 1 Hose Set Hose kit LP HP w 90 degree 8 ft 2 4 m N A 1 Qt Control Electronic...

Страница 8: ... 8 5 16 Phillips Head Screwdriver Open End Wrenches Light Machine Oil CHEB INSTALLATION STEPS 1 Cut out the template found on a panel of the cardboard box in which the unit was packed or the template may be printed and packed inside the box See Figure 2 2 Tape template to the floor to determine where holes will be drilled for line sets and condensate drain Double check underneath the cab to ensure...

Страница 9: ...o connect line set 90 degree portion to the CHEB before lowering it into bunk Use a drop of light machine oil on the male fittings to lubricate fittings and help with an easier seal Use two wrenches to tighten fittings to CHEB It is normal to hear a hiss when connecting Tighten fittings to 10 12 ft pounds See Figure 3 Figure 3 Make Connections to the CHEB Before Placing It Inside 9 Once line sets ...

Страница 10: ...oute the other refrigerant line 14 Use clips bolts washers and nuts provided in the hold down kit to mount the CHEB unit into place Someone will need to hold nut with one wrench under truck while someone inside sleeper turns the bolt Be sure to tighten slowly to prevent seizing of the nut 15 Once CHEB is properly mounted run flexible duct between adapters on CHEB and supply air grilles or Dometic ...

Страница 11: ... Example of ducting from plenum Option 2 One 5 flex duct 16 Install P Trap on drain fitting under truck for condensate pan Make sure the open end of the P Trap is facing the rear of the truck and tighten it See Figure 7 WARNING It is very important that you use the P Trap to create a water seal to prevent hazardous or deadly fumes from entering the cab ...

Страница 12: ...se in finding an empty fuse position where this occurs PART 2 CONDENSER INSTALLATION Intall the condenser on the rear exterior of the truck cab It can be mounted vertically or horizontally If mounted vertically ensure the refrigerant connections are on the bottom See Figure 8 Tools required for this step Drill Bits Insert Installation Tool Inserts Ratchet Wrenches Open End Wrenches Light Machine O...

Страница 13: ...all correctly 6 Using bolts provided mount the condenser to the back wall of the cab Figure 8 Condenser on Back of Truck PART 3 SECURING LINE SETS CONDENSER CABLE Route refrigerant line sets and cabling in a location that will not rub or chafe any structural members or be compromised by any kind of heat generating source Also be sure that they are securely fastened with the proper cable ties for a...

Страница 14: ...anical control In addition over 20 programmable functions allow the user to customize the system to suit the specific needs of the environment The system consists of the following components Power Logic Board Monitors and controls all functions of the air conditioning unit Qt Control Display Easy to read user interface with a digital readout and LED indicators Temperature Sensing Element Air tempe...

Страница 15: ...should be installed low as close to the CHEB as possible Tools required for this step Reciprocating saw Machine screws Screw nut drivers Drill Hole saw 4 4 1 2 5 5 1 4 RETURN AIR GRILLE The return air grille takes air from inside the cab and returns it to the air conditioner Therefore this grille should be placed as close as possible to the CHEB unit See Figure 11 1 Ensure that the location will h...

Страница 16: ... bunk with mattress removed Two holes side by side and possibly a short cut between the holes may be required 3 Once the locations are decided and holes cut if needed use a level to ensure the duct towers are vertical 4 Drill self tapping screws into duct towers in both grille locations to mount the towers 5 Ducting will need to be connected to the bottom of the duct tower In some cases a transiti...

Страница 17: ...5 72 5 2 72 2 5 72 6 7 7 72 685 16 57 172 2 7 1 386 5 72 7 16 57 6 386 2 1 172 2 72 2 7 1 3 85 287 5 7 5 87 25 877 1 7 0 12 3 57 180 5 6 5 37 21 47 8 7 7 5 7516 8 7 7 8 7 283 1 8 1 3 5 51 6 9 17 00 5 1 8 7 03 26 66 0 7 1 250 7 21 217 1 1 7 6 5 1 6 7 62 3523 57 2 20 7 25325 7 21 1 5 352 8 7 21 1 3 57 25 6 2 7 287 7 5 77 1 3 50 66 21 2 20 7 25325 7 21 6 352 7 35235 7 5 1 21 17 0 16 216 5 1 1 6 72 5 ...

Страница 18: ...Lights when system is in automatic changeover mode It will switch from cooling to heating as needed Fan speed is automatically selected 6 Plus and Minus Keys Raises or lowers the setpoint In programming mode these keys change function numbers and corresponding values Press and hold keys for large changes 7 Fan Key Selects manual fan control In the OFF mode pressing this key will start the fan in m...

Страница 19: ...perature In order to see the internal temperature when the unit is in program mode press the fan key twice to save existing data and exit program mode COOL MODE Press the MODE key until the COOL LED lights Note that the internal temperature must be above the setpoint by approximately three degrees before the compressor is energized and cooling begins At this point a dot will be illuminated in the ...

Страница 20: ... factory for optimum values The following programming changes are to be made by a trained technician or with the aid of a factory technician All programming is done in the OFF mode While in the OFF mode enter program mode by pressing the MODE and minus keys simultaneously for three seconds The display will flash PO during those three seconds After the three second flash a flashing 1 will appear in...

Страница 21: ...e level Running the fan speed too slow can damage the compressor Table 2 PROGRAMMABLE FUNCTION CHART Programmable Function Qt Display Indicators Function Factory Setting Range Fahrenheit Celsius Displays F OFF mode flashes 2 F F or C Low Fan Speed Displays 38 OFF mode flashes Low fan speed LED 5 38 2 to 57 High Fan Speed Displays 60 OFF mode flashes All fan speed LED 6 85 41 to 99 Fan Mode Display...

Страница 22: ...stain high and low voltages by shutting down the air conditioning system to prevent component damage At installation the Qt Control Display is calibrated to line voltage within 1 Low AC shutdown during COOL mode If incoming voltage is 104VAC on a 115VAC system for greater than three minutes the system will shut down and LO AC will flash on the display If incoming voltage is 207 on a 230VAC system ...

Страница 23: ... LEDs will remain at full brightness until 10 seconds have passed after the last keystroke To access this mode Turn the AC unit off While in OFF mode enter program mode by pressing MODE and minus key for three seconds The display will flash PO during the three seconds After the three second flash a flashing 1 will appear on the display which is function 1 While in program mode the OFF LED will fla...

Страница 24: ... HI then AC High voltage shutdown See AC line voltage calibration section LO then FC Low frequency shutdown Incoming frequency 57 Hz Adjust power source output frequency to 60 Hz with unit operating in COOL mode HI then FC High frequency shutdown Incoming frequency 63 Hz Adjust power source output frequency to 60 Hz with unit operating in COOL mode HI then PS High pressure shutdown compressor runn...

Страница 25: ... Display 4 Replace Power Logic Board Erratic temperature display 1 Perform a Factory Memory Reset 2 Check temperature sensor cable and connection 3 Ensure the temperature sensor is installed properly 4 Calibrate temperature 5 Replace Power Logic Board Erratic system operation 1 Perform a Factory Memory Reset 2 Check CXP cable and connections 3 Check temperature sensor cable and connection 4 Replac...

Страница 26: ...ed properly d Ensure the unit s circuit breaker is ON and not tripped e Ensure that the inverter if equipped is connected properly and fuse breaker DC and or AC is not tripped Unit does not operate Internal fan blower is running 1 Check that the Qt Control Display is not in the OFF mode 2 Check the Qt Control Display for fault error code and follow Fault Error Code Troubleshooting Chart 3 Check th...

Страница 27: ...ystems Dometic s Blizzard Turbo is designed so that you should never need to recharge the refrigerant loop under normal circumstances If the refrigerant level ever needs to be adjusted federal law requires that it must be done by an EPA licensed HVAC technician with the proper tools to avoid accidental discharge of any refrigerant gas into the air Table 7 MAINTENANCE FOR COMPONENTS Unit does not m...

Страница 28: ...example a typical system charge is 16 5 oz That is 10 oz in the CHEB 3 5 in the condenser 1 5 in the liquid line 1 5 in the hot gas line 16 5 oz But if your line set is not 6 ft then the optimum total system charge will be different EXTRA LENGTH LINE SET For every extra foot of length over 6 ft in the liquid line allow an additional 0 25 oz of refrigerant For example suppose the data plate says 16...

Страница 29: ...NOTES ...

Страница 30: ...NOTES ...

Страница 31: ...NOTES ...

Страница 32: ...DOMETIC TRUCK DIVISION 2000 N Andrews Ave Pompano Beach FL 33069 USA Tel 1 888 767 3362 Email sales dometictruck com dometic com L 3448 06 01 2017 ...

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