25
9. POSSIBLE FAULTS AND TROUBLESHOOTING
FAILURE
CAUSE
EXPLANATION / CORRECTIVE ACTIONS
Unit is not operating
No supply voltage
Check whether the device is connected to the
power network
Protection device is off or a current leakage
relay is active (if installed by the installer)
Switch on only if the unit condition has been
evaluated by a qualified electrician. If the sys-
tem failed, the failure MUST BE rectified prior
to switching it on.
Air supply heater or pre-heater is not operat-
ing or malfunctioning (if installed)
Too low air flow in air ducts activates automat-
ic protection
Check if air filters are not clogged Check if
fans are rotating
Manual protection is activated
Possible heater or unit failure. MUST contact
the servicing staff for failure detection and its
elimination.
Too low air flow at rated fan speed
Clogged supply and/or extract air filter(s)
Filter replacement needed
Filters are clogged and no message is shown
on the remote control
Wrong time in filter timers or their switch is
broken, or its pressure is set improperly.
Shorten filter timer time to the message of
clogged filters or replace the pressure switch
of the filters, or set their proper pressure.
10. ECODESIGN DATA TABLE
WPZ
WPZ-9ED WPZ-14WD WPZ-15ED
/ 21ED
WPZ-26WD WPZ-30ED
/ 39ED
WPZ-40WD WPZ-54W
Topology
Bidirec-
tional
Bidirec-
tional
Bidirec-
tional
Bidirec-
tional
Bidirec-
tional
Bidirec-
tional
Type of drive (fan)
Variable
Variable
Variable
Variable
Variable
Variable
Nominal NRVU flow rate
[ m
3
/s ]
0,21
0,21
0,37
0,37
0,68
0,68
0,89
Effective electric power input
[ W ]
96,1
110
242
281
495
509
651
SFPint
[ W/(m
3
/s) ]
158
230
75,3
51,7
139,2
135,5
181,9
Maximum internal SFP
[ W/(m
3
/s) ]
230
230
230
230
230
230
230
Face velocity
[ m/s ]
1,3
1,3
1,4
1,4
1,6
1,6
2,1
Nominal external pressure
[ Pa ]
150
150
250
250
250
250
250
Internal pressure drop of ventilation compo-
nents
[ Pa ]
92,7
153
34,7
25,7
67,8
67,8
113
Static efficiency of fans used in accordance with
Regulation No 327/2011
[ % ]
58,7
66,3
46
49,8
48,8
50
61,9
Declared maximum external leakage rates
(CAL(R) @ +400 Pa)
[ % ]
4
4
4
4
4
4
4
Declared maximum external leakage rates
(CAL(R) @ -400 Pa)
[ % ]
4
4
4
4
4
4
4
Filter class
C
C
C
C
C
C
C
Visual filter warning
Pressure
device
Pressure
device
Pressure
device
Pressure
device
Pressure
device
Pressure
device
Pressure
device
Casing sound power level
dB(A)
54,3
54,8
67,8
58,2
61,8
62
62,2
ErP Compliance
2018
-
2018
2018
2018
2018
2018
