Victory Reach-In Manuale di Servizio Scaricare il pdf (Pagina 79)

Section 7 Diagnostics

7-11

Diagnosing Compressor and Start Components Electrically

General

Perform the following tests, in sequence,

using a quality calibrated volt-meter.

Important

Refer to the proper wiring diagram during

each test.

1. Verify that the electric power to the

reach-in at compressor start-up is +/- 10%

of the line voltage rating.

2. Verify that the following control

components are in the closed position if

the compressor does not try to start:

• Main ON/OFF switch

• High pressure cutout control

• Temperature control

• Relay

• Defrost time clock contact #4 (freezer

only)

WARNING

Disconnect electric power to the reach-in and

the electric service switch box before

proceeding with the following steps.

External Overload Check

Check the continuity of the external overload

protector. If the compressor has an internal

overload protector, skip this test.

1. Disconnect the overload wires from other

components.

2. Check the continuity of the overload

protector:

Results of Check Action

Continuity Overload protector is OK

No continuity

Allow the compressor to

reach room temperature

and check again

No continuity

at room

temperature

Replace the

overload protector

Start Relay Check

CURRENT RELAY

1. Disconnect the wires from the start relay.

If the relay must be moved, keep it

upright.

2. Check continuity at the contact terminals.

Refer to wiring diagram for terminal

identification.

Results of Check Action

Continuity Replace the relay

No continuity Relay is OK

3. Check continuity at the relay coil

terminals. Refer to wiring diagram for

terminal identification.

Results of Check Action

Continuity Relay is OK

No continuity Replace the relay

POTENTIAL RELAY

1. Disconnect the wires from the start relay.

2. Check continuity between terminals 1 and

2. (Normally open)

Results of Check Action

Continuity Replace the relay

No continuity Relay is OK

3. Check the continuity between terminals 5

and 1. (Coil)

Results of Check Action

Continuity Relay is OK

No continuity Replace the relay

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 91 92

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