66
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 19 l/m. Reset circuit ow
rate and check for the following:
• Air locks
• Blocked strainers
• Closed valves
• Pump failure
DRV40 display errors
3m
power cable
length
172 mm
144 mm
55 mm AF Hex
1-1/2 BSP
Internal
268 mm
If any other error message is displayed see DRV40 Display Errors on pages 58-60.
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
DRV40 Display Errors on page 58-59.
Temp 49˚C
Temp 49˚C
Temp 49˚C
Temp 49˚C
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