Outlet temperature exceeds the 'Error Temp'
value. This condition causes the DRV40 to switch
to full cold. Check for the following:
• Internal seal damage.
• Debris in the internal mechanism.
• Internal mechanism damaged / disconnected.
Indicates the batteries are flat or disconnected.
Check for the following:
• Battery is connected to PCB
• Battery connections, signs of wear or
debris / corrosion.
• Batteries are at minimal power or flat.
Replace batteries (see 'Maintenance and Spare
Parts'. Do not use rechargeable batteries).
Brightness of LCD. Adjust setting on PCB. (See
'Common Faults - Cannot read the LCD
display'.)
No power to DRV40. Check circuit breaker and
electrical supply. If problem persists, replace PCB
and / or LCD.
Rogue characters appear on display. Reset
DRV40, if the error persists, replace LCD.
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