Unigas HTP2000 Installation Manual page 43

Gas operation
CAUSE
MAIN SWITCH OPEN
LACK OF GAS
MAXIMUM GAS PRESSURE SWITCH DEFECTIVE
THERMOSTATS/PRESSURE SWITCHES DEFECTIVES
OVERLOAD TRIPPED INTERVENTION
AUXILIARIES FUSE INTERRUPTED
DEFECTIVE CONTROL BOX
DEFECTIVE ACTUATOR
AIR PRESSURE SWITCH FAULT OR BAD SETTING
MINIMUM GAS PRESSURE SWITCH DEFECTIVE OR GAS
FILTER DIRTY
IGNITION TRANSFORMER FAULT
IGNITION ELECTRODES BAD POSITION
BUTTERFLY VALVE BAD SETTING
DEFECTIVE GAS GOVERNOR
BAD CONNECTION OR DEFECTIVE HIGH/LOW FLAME
THERMOSTAT OR PRESSURE SWITCH
ACTUATOR CAM WRONG SETTING
UV PROBE DIRTY OR DEFECTIVE
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TROUBLE
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