Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 277

[ IX Troubleshooting ]
Error
Error source
Code
7102 Outdoor unit
7105 Outdoor unit
7106 OA processing
unit
7110 Outdoor unit
Error definition and error
detection method
Error in the number of (1) Number of indoor units
connected units
The number of connect-
ed indoor units is "0" or
exceeds the allowable
value.
Number of units
1) Total number
2) Total number
(During auto
(2) Disconnected transmis-
(3) Short-circuited transmis-
Address setting error Erroneous setting of OC unit
address
Erroneous setting of OC The address of outdoor unit is
unit address not being set to 51 - 100.
Attribute setting error MA remote controller intended
for use with indoor units, such
as an MA remote controller, is
connected to the OA process-
ing unit whose attribute is FU.
Unset unit connection When all power sources are
information error turned off after the start-up of
the unit has completed normal-
The start-up of the unit ly.
has not completed nor- When the start-up of the unit
mally in the system to has completed without turning
which a transmission on the power source of the
booster is connected. transmission booster.
When the power source of the
transmission booster is turned
on afterwards.
Cause
connected to the outdoor
terminal block (TB3) for in-
door/outdoor transmission
lines exceeds limitations
described below.
Restriction on the
number of units
1-13 : P72 model
of indoor
1-16 : P96 P108 models
units
1-20 : P126 model
1-22 : P144 - P168 models
1-24 : P192 - P204 models
1-32 : P216 P234 models
of LOSSNAY
units
0 or 1
address start-
up only)
sion line of the outdoor unit
sion line
When (2) and (3) apply,
the following display will
appear.
In case of M-NET remote
controller
-> Nothing appears on
the display as no power is
supplied to the remote
controller.
In the case of MA remote
controller
-> "HO" will blink.
- 268 -
Check method and remedy
1) Check whether the number of
units connected to the outdoor
terminal block (TB3) for indoor/
outdoor transmission lines does
not exceed the limitation. (See
(1) and (2) on the left.)
2) Check (2) - (3) on the left.
3) Check whether the transmission
line for the terminal block for
centralized control (TB7) is not
connected to the terminal block
for the indoor/outdoor transmis-
sion line (TB3).
Check that the address of OC unit is
set to 51- 100.Reset the address if it
stays out of the range, while shutting
the power source off.
To operate the OA processing unit
using remote controllers for indoor
units, such as MA remote controller,
set the DipSW3-1 on the OA pro-
cessing unit to ON.
Operation method SW 3-1
Interlock with
OFF
the indoor unit
Direct operation with
ON
the MA remote controller
1) Check whether the power
source of the transmission is
turned on.
2) Turn off the power sources of
outdoor/indoor units and trans-
mission booster, and turn them
on again.