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Troubleshooting - Toshiba VN-M150HE Service Manual

Air to air heat exchanger concealed microcomputer control type
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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
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
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 [
in order.
2
The numbers in CODE No. indicate CODE No. [01] (latest) to [04] (oldest).
CAUTION
Do not push
3
After confirmation, push
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.
on the remote controller are flashing. When
and
buttons at the same time for 4 seconds or more,
/
] button used to set temperature, the trouble history stored in memory is displayed
button because all the trouble history of the Air to Air Heat Exchanger will be deleted.
button to return to the usual display.
and a combination of
Check code
2
3
Description
88
,
,
Unit No. of the Air to Air Heat
Exchanger in which an error occurred
,
,
1

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