Troubleshooting
If the operational interference is not shown in the display the following
tips can be used:
BASIC ACTIONS
Start by checking the following items:
• The switch's position.
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
LOW HOT WATER TEMPERATURE OR NO HOT WATER
• Closed or choked filling valve
– Open the valve.
• Indoor module in incorrect operating mode.
– If mode "manual" is selected, select "addition".
– Hot water is produced with the electric boiler/indoor module in
“manual” mode. If there is no electric boiler/indoor module, “addi-
tion” must be activated.
• Large hot water consumption.
– Wait until the hot water has heated up. Temporarily increased hot
water capacity (temporary lux) can be activated in menu 2.1.
• Too low hot water setting.
– Enter menu 2.2 and select a higher comfort mode.
• Low hot water access with the “Smart Control” function active.
– If the hot water usage has been low, VVM 320 will produce less hot
water than normal. Restart the product.
LOW ROOM TEMPERATURE
• Closed thermostats in several rooms.
79Chapter 4 | Disturbances in comfortNIBE VVM 320
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