CPI T04CO, Installation & Operation Manual

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O P E R A T I O N
5.6.7 Fault State
If a fault condition is detected, the unit transitions to the Fault state.
The fault system is always in auto recycle mode for most faults),
which allows the controller to return the unit to the pre-fault state
after a transient fault (or a series of transient faults).
Three consecutive transient faults will place the unit into
“summary fault” mode and a reset command is required to return
to normal operation.
CAUTION! All Faults should be investigated. Damage can occur if a
Reset is made without corrective action.
5.6.7.1 Auto Fault Recycle Mode Rules
Latch into Fault state (sum fault):
If three faults occur within a 20 second period, the unit latches in
the Fault state.
Recycle to prior state:
If fewer than three faults occur within 20 seconds, the system
recycles back to the appropriate operational state.
During a Fault event
High Voltage is off. Heater Reduce is on after one minute of Fault
state. RF Inhibit is on.
Since all faults are ignored during Fault, a hard fault (such as a
stuck Interlocks Open) will be seen three times as the unit cycles
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Installation and Operation Manual