Toshiba MMY-MUP0961HT6P-UL Service Manual page 148

On rotations of outdoor fans
Outdoor fans may rotate slowly to control pressure when cooling with low outer air temperature or heating with
excessive load. For control content, also refer to items in Section 5, "Control Outline: Outdoor Unit, Outdoor
Fan Control."
Operation start
Push the push-switch SW04 on the interface P.C.
board of the header unit for 2 seconds or more. The
operation starts.
Check that 7-segment display [B] shows [ CC] for
cooling and [ HH] for heating.
Confirmation of check results (1)
Check that No. of misconnected indoor units is
displayed on 7-segment display [B] after 15 minutes.
(If there is no misconnection, [00P] is displayed.)
Confirmation of check results (2)
Push the push-switch SW05 on the interface P.C. board of
the header unit for 2 seconds or more. The indoor
address in which trouble is being detected is displayed on
7-segment display [B]. If there are multiple indoor address
in which trouble is being detected, they are successively
exchanged and displayed.
(When SW05 is turned on again, the display returns to
display of No. of units.)
After check, return the rotary switches
SW01/SW02/SW03 on the interface P.C. board of the
header unit to [1/1/1].
Interface P.C. board
A
Push switch
7-segment
display [A]
(7-segment display)
[A] [B]
Cooling [ C ] [ CC ]
Heating [ H ] [ HH ]
(7-segment display)
[A] [B]
]
[ [ [ # # P]
No. of misconnected
C or H
indoor units
(7-segment display)
[A] [B]
]
[ [ [ # # ]
Address display
C or H
of misconnected
indoor unit
(7-segment display)
[A] [B]
[U1]
[ [
SW04 SW05
SW01 SW02
Rotary switches
- 148 -
Operation
This check operation
requires 15 minutes
even if there is no
misconnection or there
is any misconnection.
]
SW06
7-segment
display [B]
SW03