Sanyo CHDX09663, CHDXR07263, CHDXR09663 Compressor Trouble Diagnosis and Check Methods

10. Compressor

W-2WAY ECO-i SYSTEM Outdoor Unit Repair Procedures

10-1. Compressor Trouble Diagnosis and Check Methods

Generally, compressor failures can be classified into the following categories.

(1) Mechanical trouble (A) Locking (intrusion of foreign objects, galling, etc.)

(B)Pressure rise failure (damaged valve, seal, bearing, or other component)

(C)Noise (damaged stator rotor, valve, or other component)

(2) Electrical trouble (A) Coil burning

(B)Open circuit

(C)Insulation failure

(D)Short circuit

Trouble diagnosis is based on the following remote controller displays: [H03] (Compressor 1: INV compressor,

center), [H11] [H12] [H13] (Compressor 2: constant-speed compressor 1, left side when viewed from front), [H21] 2

[H22] [H23] (Compressor 3: constant-speed compressor 2, right side when viewed from front (not present in type

90). A judgment is made based on factors that include the following: coil resistance (varies depending on the compressor), insulation resistance, current, leakage breaker operation, oil and refrigerant fouling, odor, pressure, and noise.

Reference: Insulation resistance (Use a DC 500 V insulation resistance meter and measure the insulation resis- tance between the electrified and non-electrified parts.)

(a) Motor	Min. 300 M
(b) Compressor	Min. 100 M (servicing part)
(c) Unit	Min. 10 M (This is due to the presence of refrigerant, which decreases the
	insulation resistance.)

* Minimum insulation resistance as required by generally accepted requirements is 1 M .

JUDGMENT START

Is there burning of the failed compressor motor?

YES

Follow the instructions in

“3. Discharging Compressor Oil” and drain the oil from all compressors in the same system. Then inspect.

Are there 2 or more outdoor units where the compressor oil color phase is 4.0 or higher or where a sharp odor is present?

YES

	Follow the instructions in
NO	“3. Discharging Compressor Oil”
	and drain the oil from the failed
	compressor. Then inspect.

YES

NO

Is the color phase 4.0 or above, or is a sharp odor present?

NO

Go to “10-2-3. Replacing all	Go to “10-2-2. Replacing all
compressors in a system.”	compressors in a failed unit.”
Follow the instructions in “10-2-4. Dry	Follow the instructions in
core cleaning” and perform dry core	“10-2-4. Dry core cleaning” and
cleaning of all outdoor units.	perform dry core cleaning of the
	failed outdoor unit.

Go to “10-2-1. Replacing only the

failed compressor.”

Reference: Symptoms of motor burning

1.Ground fault results in breaker operation.

2.Short circuit results in different coil resistance at different phases.

3.Open circuit

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