Blizzard Turbo Split System Manual
TROUBLESHOOTING
L-3448 ENGLISH
25
O
PTIMIZING
P
ERFORMANCE
R
EDUCE
H
EAT
L
OAD
To improve the air conditioner's performance on a hot day, you can reduce the heat load by parking in a shaded area, covering
the windows with reflective shades to block out direct sunlight and pulling the curtain between the sleeper and cab. Make sure
windows and doors are tightly closed and turn off any other heat-producing appliances.
O
PERATION
AND
M
AINTENANCE
Inspect and clean the air filter
regularly to ensure good air flow across the evaporator coils. You will find the filter in the return
air path, either directly behind the grill or in front of the evaporator coil.
Do not block the air flow
between the return air grill and evaporator coil with pillows, blankets, papers or other objects.
Check the condensate drain
often to make sure water is draining properly. Make sure the drain fittings do not get clogged.
Note that the drain hose under the truck should be tied in a loop so as to form a natural trap. This will help prevent outside air
and exhaust discharge from getting inside.
Inspect and clean any debris
from the condenser coil area of the external condensing unit to ensure good air flow.
Occasionally check for chafe
on outside wires and refrigerant lines (split systems).
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 make warm air.
1. Make sure switch is set to HEAT
2. Check the evaporator air filter, clean as needed
3. Make sure evaporator blower is running by checking for air flow from the
grill
4. Manually lower the fan speed, air temperature should warm up
Unit does not cool or heat sufficiently.
1. Change the setpoint of the thermostat as required
2. Check evaporator air filter, clean as needed
3. Check condenser coil, clean as needed
4. Close curtains over windows and between the cab and sleeper
5. Call a service technician, do not attempt internal repairs yourself
COMPONENT
NECESSARY ACTION
Compressor
No maintenance is necessary
Condenser Blower
No maintenance is necessary
Evaporator Blower
No maintenance is necessary
Heater
No maintenance is necessary
Evaporator Filter
Remove and wash with soapy water or blow out with compressed air monthly
Condenser Screen
Clean debris from screen every month during the cooling season
Condenser Coil
Clean with water and soap once yearly to remove any oil or debris
Drain Tubing
Check for obstructions and positioning before the cooling season
PROBLEM
SOLUTIONS
