Super Multi System - Toshiba

50
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[88] 1. Error connection between Multi Controller
Communication alarm between Multi Controller and outdoor unit.
and outdoor unit 2. Outdoor PC board error (MCC-1223).
3. Multi Controller PC board error (MCC-1210).
4. Multi Controller does not recognise outdoor
capacity.
Check lead connection between indoor unit and Multi Controller.
If no error is detected, replace Multi Controller board (MCC-1210) or outdoor PC board (MCC-1223).
Check code Operation cause
[89] 1. No. of connected indoor units/connected over
Indoor over capacity capacity.
2. Incorrect set-up of indoor unit horse power or
set to 0.
Is No. of connected indoor
units acceptable? (*1)
�
Is set-up of indoor unit
horse power correct? (*2)
�
Yes
Yes
Is total capacity of
connected indoor units
within indoor unit diversity?
1. M/C = 135%
2. 4 M/C = 160%
�
Yes
Check IPDU PC board
No
No
No
�
�
�
Indoor units from another system have been
incorrectly connected.
Modify miswiring/installation.
Modify set-up of horse power.
Keep capacity of connected indoor units
within unit diversity.
(*1)
Number of Maximum No. of Indoor unit diversity Maximum system code Maximum code per
Multi Controllers indoor units Multi Controller
1 4 135% 27 27
2 8 160% 32 27
3 12 27 (13*)
4 16 13
(*2)
Indoor unit Capacity No connection 10 13 16 20 26 36 46
Code number 0 2 3 4 5 6 8 10
(Example: Model RAV-364UH-PE, capacity = 36)