Download  Print this page

How To Diagnose The Trouble - Toshiba VN-250SE Service Manual

Heat exchange ventilators
Hide thumbs

Advertisement

<VN-250SE, VN-350SE, VN-500SE, VN-800SE, VN-1KSAE>
Phenomenon
Motor fan does not
revolve.
Abnormal sound is heard
from inside the main unit.
Motor fan revolution is
weak.
Damper does not open/
close.

9. HOW TO DIAGNOSE THE TROUBLE

Check point
• Wall switch
• Lead wire
• Connecting section
• Motor fan
• Turning section of fan
sirocco
• Capacitor
• Relay
• Power supply
• Terminal block of wall
(Assembly of electric
parts stool)
• Motor fan
• Fan sirocco
• Screws of each part of
main unit
• Filter
• Heat exchanger
• Capacitor
• Wall switch
• Lead wire
• Motor damper
• Damper
• Connector assembly
Cause
Connection failure, Incor-
rect connection
Wire disconnection
Contact failure
Motor revolution section
(Bearing) is locked.
Motor winding or temp. fuse
is disconnected.
Turning section of fan
sirocco is locked.
Capacitor trouble
Relay trouble
Abnormal power is applied.
Miswiring
Electromagnetic sound
(Buzzing of motor)
Bearing failure
Incomplete attachment of
fan sirocco
Suction of foreign matter
Deformed fan sirocco
Loosening of screw
(Resonance due to incom-
plete tightening)
Clogging of filter
Clogging of heat exchanger
Capacitor failure
Contact failure
Contact failure
Winding of motor damper is
disconnected.
Catching at sliding section
Contact failure
– 24 –
Measures
• Replace wall switch. Correct
connection.
• Replace motor fan.
• Connect surely. (Assembly of
electric parts stool, Fan)
• Replace motor fan.
• Remove locked part.
• Replace capacitor.
• Replace relay.
• Check power supply.
• Re-wire according to the
wiring diagram.
• Replace motor fan.
• Attach fan sirocco firmly.
• Remove foreign matter.
• Replace fan sirocco.
• Tighten screw firmly.
• Clean filter.
• Clean heat exchanger
• Replace capacitor.
• Ensure contact.
• Ensure contact.
• Replace motor damper.
• Correct catching.
• Replace connector assembly.

Advertisement

Table of Contents
loading

  Also See for Toshiba VN-250SE

  Related Manuals for Toshiba VN-250SE

This manual is also suitable for:

Vn-350seVn-500seVn-800seVn-1ksae