Blue Bird Coachworks 450 LXi, Руководство пользователя

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450 LXi Owner Manual 4-8 Heating Systems
Rev. “C”
~ 4-8-5 ~
4-8.5.10 – Heater Cycling
(Normal Operation)
The operating aquastat installed on the water jacket has been satisfi ed.
The burner will shut down.
The diagnostic code, will be displayed.
The control board will purge the burner with the combustion fan for two minutes and then stop. The circulating pump will
run until the last thermostat is satisfi ed, then will purge for two minutes and stop.
To maintain the system temperature the operating aquastat will cycle the burner off at 185°F (85°C) and on again at
150°F (65°C).
If the heater cools and fails to resume operation and the diagnostic code continues to be displayed, the aquastat is
faulty or has an open connection.
4-8.5.11 – Thermostats Off
(Normal Operation)
All thermostats and aquastats are satisfi ed.
The burner will shut down.
The diagnostic code, will be displayed.
The control board will purge the system with the combustion fan and the circulating pump for two minutes. When any
thermostat or aquastat calls for heat, the heater will resume normal operation.
If the heater fails to resume operations, check the thermostat and their connections.
4-8.5.12 – Voltage Low or High
The battery or power supply voltage is below 10.5Vdc or above 15.5Vdc.
The burner will shut down.
The diagnostic code, will be displayed.
The buzzer will sound for 10 seconds.
The control board will purge the system with the combustion fan and circulating pump for two minutes while it is checking
if the voltage fault is still present.
If the voltage fault has cleared, the control board resets the alarm and restarts the burner. If the condition has not cleared by
the end of the purge period, the diagnostic code remains displayed. The control board continues to check the voltage every
half hour until the voltage fault clears and then restarts the burner. To manually reset the fault, switch the service switch or
the remote panel switch OFF then ON again.
4-8.5.13 – Overheat
The high temperature limit has been reached.
The burner will shut down.
The diagnostic code, will be displayed.
The buzzer will sound for 10 seconds.
The control board will purge the system with the combustion fan and the circulating pump for two minutes while it is
checking if the overheat condition exists. If the condition exists, the diagnostic code will continue to be displayed.
In order to restart the burner, fi rst check the circulating pump, the level of the coolant, and the movement of the coolant
while the circulating pump is running. Then reset the fault after the water has cooled down by switching the service
switch or the remote panel switch OFF then ON again. If it does not reset, check for faulty aquastat and proper ground.
If a number diagnostic code lights up and the heater is not in an overheat condition, check the ground from the heater to the
battery. The ground should be a minimum 10 AWG and connected directly to the battery.
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