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Brivis Fault Code 33

Brivis Error Code 33 Mod Valve Open Circuit:The feedback current from the gas valve modulating coil is not detected for at least the gas valve modulating coil fault time even though a drive level is being applied to the coil.

For Heater Repair Tech Only

Reason: The feedback current from the gas valve modulating coil is not detected for at least the gas valve modulating coil fault delay time interval of 5 seconds even though a drive level is being applied to the coil. Limp Mode Operation The gas valve modulating coil control reverts to open loop mode where the current level supplied to the modulating coil is fixed at 60 mA. Should the feedback signal become available the control reverts back to normal operation. Service Check List Loom connection is loose resulting in intermittent operation – check loom continuity at PCB connector loom while still connected to gas valve. Wiggle the loom to check for poor connection. Loom is damaged resulting in intermittent operation – check loom continuity at PCB connector loom while still connected to gas valve. Wiggle the loom to check for poor connection. Gas valve modulating coil is faulty – check coil resistance is between 82 to 88 Ω @ 20°C Poor connector on PCB – check for looseness on the PCB.