Armstrong BRAIN DMC80 - Unable to Adjust Outlet Temperature

67
Armstrong International
Parc Industriel Des Hants-Sarts, 2ème Avenue No. 4, Haerstal, B-4040, Belgium
armstronginternational.com/brain
Problem: “Unable to adjust outlet temperature...”
H C
Water pressure / ow
Make sure supply pressures are balanced.
Make sure mixed return is owing correctly to
water heater. Check for the following:
• Air locks
• Blocked strainers
• Closed valves
Checkvalves
Check circuit to make sure checkvalves are
correct positioned and operating normally.
(See Piping Diagrams on pages 12-15)
Check mixed return temperature.
Minimum recirculation loop temperature loss
= 1°C
Check blend circuit ow rate.
Flow rate is less than 38 l/m. Reset circuit ow
rate and check for the following:
• Air locks
• Blocked strainers
• Closed valves
• Pump failure
DRV80 display errors
If any other error message is displayed see DRV80 Display Errors on pages 59-61.
Return to Hot
Water Supply Inlet
These are the most likely error messages
to be displayed during this problem. For the
most probable causes and solutions see
DRV80 Display Errors on page 59-60.
Temp 49˚C
Error PCB
Temp 49˚C
Error Drive
Temp 49˚C
Error Temp
Temp 49˚C
Error Thermistor