Dometic Blizzard Turbo Installation And Operation Manual page 26

TROUBLESHOOTING
S T
YSTEM ROUBLESHOOTING
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
Unit does not operate at all. Internal fan
(blower) is not running.
Unit does not operate. Internal fan (blower) is
running.
Unit does not make cold air.
24
G
UIDE
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
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
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.)
Tur
Blizzard bo Split System Manual
SOLUTIONS
L-3448 ENGLISH