Xpelair Xcell 400 QV, Installation And Operating Instructions Manual

Page: 39 / 43

39
10 Malfunctions
Important:
Servicing of the MVHR may only be carried out by a qualified service technician.
Contact details for servicing by Xpelair approved technicians can be found on the back of this booklet.
10.1 Fault locating table
FAULT /
MALFUNCTION
CHECK POSSIBLE CAUSE
Supply air and/or
exhaust air Fan
does not work
The mains supply is on.
All 3 LEDs on the Automatic 3-
Speed Switch are flashing. (Xcell
400 QVW model only).
Error message on the display panel
for which Fan is faulty.
(Xcell 400 QVI model only).
All Xcell 400 models:
-
Supply air Fan defective
-
Exhaust air Fan defective
-
Fan blade catching on inner EPP housing
-
Contact fault on Fan control or power leads
Xcell 400 QV model only:
-
The Manual 2-Speed Switch PCB is defective
Xcell 400 QVW model only:
-
The main Control PCB is defective
Xcell 400 QVW model only:
-
The main Control PCB is defective
-
The 2A fuse has blown on the main Control PCB
-
Controller PCB is defective
-
Display PCB is defective
Supply air and/or
exhaust air Fan
does not work
The mains supply is on.
No LEDs on the Automatic 3-Speed
Switch are flashing. (Xcell 400
QVW model only).
No error message on the display
panel. (Xcell 400 QVI model only).
-
Mains supply interrupted
-
Contact fault on Fan control or power leads
-
Fuse has blown:
-
Mains supply fuse or
-
Supply cord plug fuse or
-
Main Control PCB fuse
(Xcell 400 QVI model only)
Supply air and/or
exhaust air Fan
does not work
Display is flashing GREEN. „Frost
Protection Monitoring‟ is displayed.
(Xcell 400 QVI model only).
-
Exhaust air temperature sensor signals exhaust
air is below 8°C - overcooling protection has been
activated
Supply air and/or
exhaust air flow
rate is too low
LED on the Automatic 3-Speed
Switch is flashing - filter service
indicated. (Xcell 400 QVW model
only).
Display is GREEN and “Change
Filter” or “Clean” is displayed. (Xcell
400 QVI model only).
-
Filter service period has expired
No water coming
through the
Condensate Drain
Tube
Drops of water on the underside of
the MVHR.
-
No water in the siphon
-
Condensate water drain blocked
Noise coming from
the MVHR
Fans are noisy.
-
Increased air resistance due to dirty Filters and/or
Heat Exchanger
-
Obstruction in the duct system
-
Room based air regulator valves not open wide
enough
-
Fan blade touching inner EPP housing
RF Transmitter(s)
do not work
The mains supply is on.
-
Battery inside RF Transmitter needs replacing,
see Section 8.13
Note - This table may be subject to technical amendments.