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)
Is total capacity of
connected indoor units
within indoor unit diversity?
1. M/C = 135%
2. 4 M/C = 160%
Modify set-up of horse power.
Indoor units from another system have been
incorrectly connected.
Modify miswiring/installation.
j
j
h
h
No
No
Yes
Yes
Keep capacity of connected indoor units
within unit diversity.
h
No
Check IPDU PC board
j
Yes
(*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)
Summary of Contents for HFC R407C
Page 1: ...A90 0233 HFC R407C Super Multi System Service Manual Air Conditioner Multi Split Type System ...
Page 2: ...2 ...
Page 18: ...18 Wiring diagrams Outdoor unit MAR F105HTM8 PE ...
Page 19: ...19 Wiring diagrams Outdoor unit ...
Page 21: ...21 Refrigeration piping schematic diagram Outdoor unit ...
Page 74: ...74 Exploded view and service parts Outdoor unit ...
Page 75: ...75 Exploded view and service parts Outdoor unit 12 14 j ...
Page 80: ...www toshiba aircon co uk MADE IN UK A90 0233 Revised October 2002 ...
