Clearing From The Interface P.c. Board; Clearing Of Error Check Code By Power Reset - Toshiba Super MMU-AP0091H Service Manual

2. Clearing from the interface P.C. board

Using the switches on the interface P .C. board, this function is to clear the currently detected error for each
refrigerant circuit system without resetting the power supply.
(→ Restart of error detection)
Errors in both outdoor and indoor units are once cleared.
Set the rotary switches on the interface P.C. board of the
header unit to the following setting.
SW01=[2] SW02=[16] SW03=[1]
Push the push-switch SW04 on the interface P.C. board of
the header unit for 5 seconds or more.
[ C L] is displayed in 7-segment display [B] on the P.C. board
(for 5 seconds), and the error is completely cleared.
Interface P.C. board

3. Clearing of error check code by power reset

This function is provided to clear error in a refrigerant circuit system by resetting the power of all the outdoor
and the indoor units.
(→ Restart of error detection)
As same as the clearing method on the interface P .C. board, errors of both the outdoor and the indoor units
are once cleared.
<Method>
1. Be sure to reset power of both the outdoor and the indoor units.
2. Turn on the power of the indoor unit prior to the power of the outdoor unit.
(If the power is turned on in reverse order, a check code [E19] (No. of header unit error) is output.)
NOTE) After power reset, it requires usually 3 minutes to power-on due to the initial communication of the
system. In same cases, it requires Max. 10 minutes.
(7-segment display)
[A]
[ E
(7-segment display)
[A]
[ E
7-segment display [A]
Push
switch
SW04
SW01 SW02 SW03
<Rotary switch>
119
[B]
] [ ]
[B]
] [ C L ]
7-segment display [B]
Push
switch
SW05