Before Calling For Service; Troubleshooting - Toshiba VN-M150HE Bedienungsanleitung

10

Before calling for service

Check the points described below before asking for repair servicing.
Symptom
• Is the circuit breaker turned off?
• Has a power failure occurred?
Operation does not start after pressing
• Does the
the button.
(The ventilation delay setting is set to "ON" and it is not malfunction. The Air to
Air Heat Exchanger will start running after the time set has passed. Consult your
dealer for details.)
Does the
The unit runs though the operation lamp The nighttime heat purge operation or 24-hour ventilation is set to "ON". See page
does not turn on. 10 for how to use the functions. Consult your dealer to change the setting to
"OFF".
Has the unit just recovered from a power failure or have you just turned on the
The unit starts running without any circuit breaker?
operation of the remote controller. (The settings concerning recovering from power failure are set to "ON". Consult
your dealer for details.
27-EN
Cause
indicator light up?
or indicator appear on the display?
11

Troubleshooting

CAUTION
If any of the following conditions occur, turn off the main power supply switch and immediately contact the dealer:
• Switch operation does not work properly.
• The main power fuse often blows out, or the circuit breaker is often activated.
• A foreign matter or water fall indoor the Air to Air Heat Exchanger.
• When the Air to Air Heat Exchanger does not operate even after the cause of the protective device activation has
been removed.
(The operation lamp and on the remote controller are flashing.When
or and a number are displayed on the remote controller, also inform a qualified service person of the display
content.)
• Any other unusual conditions are observed.
Confirmation and check
When a trouble occurred in the Air to Air Heat Exchanger, the check
code and the unit No. of the Air to Air Heat Exchanger appear on the
display part of the remote controller.
The check code is only displayed during the operation.
If the display disappears, operate the Air to Air Heat Exchanger
according to the following "Confirmation of error history" for
confirmation.
* Unit No. of the Air to Air Heat Exchanger is 31-∗∗.
Confirmation of error history
When a trouble occurred on the Air to Air Heat Exchanger,
the trouble history can be confirmed with the following
procedure. (The trouble history is stored in memory up to
4 troubles.)
The history can be confirmed from both operating status
and stop status.
Procedure
When pushing and buttons at the same time for 4 seconds or more,
the following display appears.
If [ Service check] is displayed, the mode enters in the trouble history
mode.
1
• [01 : Order of trouble history] is displayed in CODE No. window.
• [Check code] is displayed.
• [Unit No. of the Air to Air Heat Exchanger in which an error occurred] is
displayed in UNIT No..
* Unit No. of the Air to Air Heat Exchanger is 31-∗∗.
Every pushing of [ / ] button used to set temperature, the trouble history stored in memory is displayed
in order.
2
The numbers in CODE No. indicate CODE No. [01] (latest) to [04] (oldest).
CAUTION
Do not push button because all the trouble history of the Air to Air Heat Exchanger will be deleted.
3
After confirmation, push button to return to the usual display.
1. Check the troubles according to the above procedure.
2. Ask an authorized dealer or qualified service (maintenance) professional to repair or maintain the Air to Air Heat
Exchanger.
3. More details of the error code are explained in Installation Manual.
– 14 –
and a combination of , , ,
Check code Unit No. of the Air to Air Heat
Exchanger in which an error occurred
2
3
Description
,
EN
1
28-EN