Mitsubishi Electric PURY-RP200 Service Handbook page 27

[ II Restrictions ]
(3) Reusability check of the existing transmission lines for Replace Multi units
Check the existing wires for damage to insulation by measuring the resistance between the lead and the
ground with a 500 V ohmmeter. If the insulation resistance is less than 100 MΩ, replace the wires.
Use the flowcharts on the following pages to determine the reusability of the existing transmission lines.
Obtain the system configuration drawing, fill out the checklist, and make a decision based on them.
Existing transmission lines reusability checklist
1. Remote controller cable (MA remote controller)
(1) Length
(2) Cable size
(3) Number of cores
(4) Cable type (shielded/unshielded)
2. Remote controller cable (ME remote controller)
(1) Length *1
(2) Cable size
(3) Number of cores
(4) Cable type (shielded/unshielded)
3. Remote controller cable (system controller)
(1) Length *1
(2) Cable size
(3) Number of cores
(4) Cable type (shielded/unshielded)
(5) System controller connection (Indoor unit
system/centralized control system)
4. Indoor-outdoor transmission line
(1) Refrigerant system (Single/Multiple)
(2) Length of transmission line to the farthest unit *1
(3) Cable size
(4) Number of cores
(5) Cable type (shielded/unshielded)
(6) Number of connected indoor units
5. Centralized control transmission line
(1) Length of transmission line to the farthest unit *1
(2) Cable size
(3) Number of cores
(4) Cable type (shielded/unshielded)
6. Availability of system configuration drawing (Obtain one as
much as possible.)
7. Noise-related problems with the old units
(Write down the nature of the problem in the "Notes" column,
if any.)
8. Are there any high-frequency medical equipment in the adjacent
area that could cause noise-interference?
(Write down the specific nature of the concerns in the "Notes"
column, if any.)
*1: If the remote controller (ME/System controller) length exceeds 10 m, include the exceeded length in the calculation of the
transmission line length (indoor-outdoor transmission line/centralized control system).
HWE10020
Check items
- 18 -
Findings
m
mm 2
Cores
Shielded/Unshielded
m
mm 2
Cores
Shielded/Unshielded
m
mm 2
Cores
Shielded/Unshielded
Indoor/Centralized
Single/Multiple
m
mm 2
Cores
Shielded/Unshielded
units
m
mm 2
Cores
Shielded/Unshielded
Available/Not available
Available/Not available
Available/Not available
Notes
GB