Error Code [7107] - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

[7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ]
7-9-3 Error Code [7102]
1. Error code definition
Wrong number of connected units
2. Error definition and error detection method
The number of connected indoor units is "0" or exceeds the allowable value.
3. Error source, cause, check method and remedy
After troubleshooting the error using the check methods and remedies shown below, turn the power back on.
Error source
Outdoor unit (1)
Number of units
Total number of
indoor units
Number of Main
HBCs
Number of Sub
HBCs
Total number of
LOSSNAY units
(During auto
address start-up
only)
Total number of
outdoor units
(2)
(3)
(4)
(5)
HBC (1)
BS_07_M
Cause
Number of indoor units connected to the outdoor
terminal block (TB3) for indoor/ outdoor transmis-
sion lines exceeds limitations described below.
Restriction on the number of units
1 - 31 : (E)M200 model
1 - 40 : (E)M250 model
1 - 49 : (E)M300 model
2 - 50 : (E)M350 - 500 models
0 - 3
0 or 1
1 : (E)M200 - (E)M500 YNW models
Disconnected transmission line from the outdoor
unit or HBC
Short-circuited transmission line
When (2) and (3) apply, the following display will
appear.
ME remote controller
Nothing appears on the remote controller be-
cause it is not powered.
MA remote controller
"HO" or "PLEASE WAIT" blinks.
The model selection switch (SW5-7) on the out-
door unit is set to OFF. (Normally set to ON)
Outdoor unit address setting error
The outdoor units in the same refrigerant circuit do
not have sequential address numbers.
The outdoor unit is not R32-compatible.
1) Check whether the number of units con-
nected 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 transmission
line (TB3).
1
4) Check the setting for the model selection
switch on the outdoor unit (Dipswitches
SW5-7 on the outdoor unit control board).
1) Check the model of the outdoor unit to
see if it is R32-compatible.
Check method and remedy
chapter 7 -
83