TROUBLE DIAGNOSES — Preliminary Check (Cont'd) — Preliminary Check 5 (Noise)
HA-64flowchart"Pully" preserved verbatim from source manual (typo for "pulley"). Tree structure: 4 first-level branches off the root, each with 1–2 leaves.
Preliminary Check (Cont'd)
PRELIMINARY CHECK 5
Noise
Preliminary Check 5 — noise source diagnosis
1
Check where noise comes from.
Expansion valve
Expansion valve
Replace expansion valve.
Compressor
Compressor
Replace compressor.
Belt
2
Refrigerant line
The line is not fixed.
The line is not fixed.
Fix the line tightly.
3
The line is fixed directly to the body.
4
Fix the line with rubber or some vibration-absorbing material.