Powering Up The Unit; Setting The Pump Speed; Fault Signals - HTW ECO-THERMAL PLUS -V18WD2RN8PLUS Manuel De L'utilisateur Et D'installation

10.5 Powering up the unit

When power to the unit is turned on, "1%~99%" is displayed on the user interface during initialization. During this process the
user interface cannot be operated.

10.6 Setting the pump speed

The pump speed can be selected by adjusting the red knob on the pump. The notch point indicates
pump speed.
The default setting is the highest speed (III). If the water flow in the system is too high the speed can
be set to low (I).
The available external static pressure function for water flow is shown in the graph below.
120
110
100
90
80
70
60
50
40
30
20
10
0
0.0 0.5 1.0
Operating the system with closed valves will damage the circulation pump!
If it's necessary to check the running status of the pump when unit power on. please do not touch the internal
electronic control box components to avoid electric shock.
1) Faults with external interference sources
Only have faults remedied by qualified personnel.
Faults
Pump is not running
although the power
supply is switched on.
Black display
Pump is making noises.

2) Fault signals

• The fault signal is indicated by the LED display .
• The fault signal LED is continuously illuminated in red .
• The pump switches off (depending on the error code), and attempts a cyclical restart.
EXCEPTION: Error code E10 (blocking)
After approx. 10 minutes, the pump switches off permanently and displays the error code.
Available external static presurre VS Flow rate
C2
C1
1.5 2.0 2.5 3.0
Flow rate
(m
DANGER
Causes
Electrical fuse defective
Pump has no voltage.
Cavitation due to insufficient
suction pressure.
INFORMATION
i
44
C3
3.5 4.0 4.5 5.0
3 /h)
Remedy
Check fuses.
Restore power after interruption.
.
Increase the system suction pressure
within the permissible range.
Check the delivery head setting and set
to lower head if necessary.
5.5 6.0