Mitsubishi Electric PUHY-RP200, Service Handbook

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[
II
Restrictions ]
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HWE10130 GB
(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 M Ω , replace the wires.
Check items Notes
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)
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)
7. Noise-related problems with the old units
Existing transmission lines reusability checklist
Obtain the system configuration drawing, fill out the checklist, and make a decision based on them.
Use the flowcharts on the following pages to determine the reusability of the existing transmission lines.
*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).
(5) System controller connection (Indoor unit
system/centralized control system)
6. Availability of system configuration drawing (Obtain one as
much as possible.)
8. Are there any high-frequency medical equipment in the adjacent
area that could cause noise-interference?
(Write down the nature of the problem in the “Notes” column,
if any.)
(Write down the specific nature of the concerns in the “Notes”
column, if any.)
Findings
Shielded/Unshielded
Shielded/Unshielded
Shielded/Unshielded
Indoor/Centralized
Single/Multiple
Shielded/Unshielded
Shielded/Unshielded
Available/Not available
Available/Not available
m
mm
2
m
mm 2
m
mm 2
m
mm 2
m
mm
2
Cores
Cores
Cores
Cores
units
Cores
Available/Not available