Mitsubishi Electric CITY MULTI PUHY-P200YEM-A Service Handbook page 142

(3) System error
Checking
Meaning, detecting method
code
7100 Total capacity error
Total capacity of indoor units in
the same refrigerant system ex-
ceeds limitations.
Trouble source:
Outdoor unit
7101 Capacity code error
Error display at erroneous con-
nection of Indoor unit of which
model name can not be con-
nected.
Trouble source :
Outdoor unit
Indoor unit
7102 Connected unit count over
Number of units connected in the
same refrigerant system exceeds
limitations.
Trouble source:
Outdoor unit
7105 Address setting error
• Erroneous setting of OC unit
address
• Erroneous setting of BC con-
troller address
Trouble source :
Outdoor unit
BC controller
Cause
1) Total capacity of indoor units in the
same refrigerant system exceeds
the following:
Model Total capacity code
PURY-P200 62
PURY-P250 78
PU(H)Y-(P)200 53
PU(H)Y-(P)250 66
PU(H)Y-(P)315
87
2) Erroneous setting of OC model se-
lector switch (SW3-10).
ON
OFF
1 2 3 4 5 6 7 8 9 10
SW3
1) The Indoor unit model name (model
code) connected is not connectable.
Connectable range.....20~250
2) Erroneous setting of the switch
(SW2) for setting of model name of
Indoor unit connected.
1) Number of unit connected to termi-
nal block (TB3) for outdoor/indoor
transmission line exceeds limita-
tions given be-lows:
Item Limitation
Total of PU(H)Y-(P)200:1~13
Indoor unit PU(H)Y-(P)250·315:1~16
PURY-P200:1~15
PURY-P250:1~16
Total of Indoor
1~35
unit & RC
Total of BC
1
controller
2) The Outdoor unit address is being
set to 51~100 under automatic ad-
dress mode (Remote controller dis-
plays "HO").
3) Disconnection of transmission wir-
ing at Outdoor unit.
4) Short circuit of transmission line in
case of 3) & 4), remote controller
displays "HO".
1) Setting error of Outdoor unit ad-
dress.
The address of Outdoor unit is not
being set to 51~100.
2) The address of BC controller is not
being set within 51~100.
- 141 -
Checking method & Countermeasure
a) Check for the model total (capacity cord total) of
indoor units connected.
b) Check whether indoor unit capacity code (SW2)
is wrongly set.
For erroneous switch setting, modify it, turn off
power source of outdoor unit, and indoor unit
simultaneously for 5 minutes or more to modify
the switch for setting the model name (capacity
coad).
Check for the model selector switch (Dip switches
SW3-10 on outdoor unit control circuit) of OC.
..... 250
... 200
a) Check for the model name of the Indoor unit
connected.
b) Check for the switch (SW2 if indoor controller
for setting of Indoor unit model name of gener-
ating address. When it is not agreed to the model
name, modify the capacity code while shutting
off the power source of Indoor unit.
The capacity of Indoor unit can be confirmed by
the self-diagnosios function (SW1 operation) of
Indoor unit.
a) Check whether the connection of units to the
terminal block for indoor/outdoor transmission
wiring (TB3) of outdoor unit is not exceeding the
limitation.
b) Check for 2), 3), and 4).
c) Check for the connection of transmission wiring
to the terminal block for centralized control is
erroneously connected to the indoor/outdoor
transmission wiring terminal block (TB3).
d) Check for the model total (capacity code total)
of indoor units connected.
Check that the address of OC unit is being set to
51~100.
Reset the address if it stays out of the range, while
shutting the power source off.
When BC controller is out of the range, reset it while
shutting the power source of both OC unit and BC
controller off.