Lochinvar EcoForce EF80 Installation, Commissioning, User And Maintenance Instructions page 108

Display message
Reason
Cause:
The water pressure in the system is too high.
Corrective action:
Check if the system pressure is too high after (re)filling.
Make sure that there is a pressure relief valve and expansion vessel installed in the system, according to the
applicable standards.
Check if there is an open connection between the unit and the relief valve plus expansion vessel.
Be aware that if the unit is installed in the basement of a tall building, only the static pressure of the water
column above the units can raise above the maximum allowable limits. Make sure that this is not the case.
Cause:
The water pressure in the system is too low.
Corrective action:
Check if there is no leakage in the system that causes the pressure to drop. Fix any leakage and fill the system.
Check if there is an external system pump that sucks water through the water heater, causing an under
pressure. (Bad installation design).
Display message
Reason
Cause:
The supplied power does not comply with the specifications.
Corrective action:
Check if the power supply is connected correctly to the unit.
Check the voltage and frequency (should be Life Neutral, Gnd > 230Vac/50Hz).
Make sure there is no signal failing or voltage peaks in the power supply.
Display message
Reason
Cause:
The water flow through the unit is too low.
Corrective action:
Check functioning of the pump.
Check/open all valves that might restrict the water flow through the unit.
Check for an external system pump that influences flow through the unit.
Check if the system resistance exceeds the spare capacity of the unit pump.
Make sure the heat exchanger is clean. Heat exchanger fouling (partly blockage) will increase the resistance
causing the water flow to drop.
W a t e r p r
Water pressure is too low or high.
L i n e f a u
p u m p o n
Bad power supply
T 1 - T 2 h
Difference between T1 and T2 has exceeded the blocking value which has been
set in the parameters.
e s s u r e
9 9 9
l t
9 9 9
i g h
9 9 9
f a u l t
, 5 h r s
, 5 h r s
, 5 h r s
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