Maytag MTB1504ARW Operations Instructions download pdf (Page 11)

Refrigerant Precautions

WARNING

To avoid risk of personal injury, do not allow

refrigerant to contact eyes or skin.

CAUTION

To avoid risk of property damage, do not use

refrigerant other than that shown on unit serial

number identification plate.

NOTE: All precautionary measures recommended by

refrigerant manufacturers and suppliers apply

and should be observed.

Line Piercing Valves

Line piercing valves can be used for diagnosis, but

are not suitable for evacuating or charging due to

holes pierced in tubing by valves.

NOTE: Do not leave line piercing valves on system.

Connection between valve and tubing is not

hermetically sealed. Leaks will occur.

Open Lines

During any processing of refrigeration system, never

leave lines open to atmosphere. Open lines allow water

vapor to enter system, making proper evacuation more

difficult.

Compressor Operational Test

(short term testing only)

If compressor voltage, capacitor, overload, and motor

winding tests are successful (do not indicate a fault),

perform the following test:

1.Disconnect power to unit.

2.Discharge capacitor by shorting capacitor

terminals through a resistor.

NOTE: Not all units have run capacitor.

3.Remove leads from compressor terminals.

4.Attach test cord to compressor windings.

• Common lead on test cord attaches to C terminal

on compressor.

• Start lead on test cord attaches to S terminal on

compressor.

• Run lead on test cord attaches to M terminal on

compressor.

Service Procedures

Fuses

Capacitor

Compressor

Switch

To AC supply

Attaching Capacitor for Compressor Test

5. Connect a known good capacitor into circuit as shown

above. For proper capacitor size and rating, see

technical data sheet for unit under test.

NOTE: Ensure test cord cables and fuses meet

specifications for unit under test (see Technical

Sheet for unit under test).

6. Replace compressor protector cover securely.

7. Plug test cord into outlet, then press and release start

cord switch.

CAUTION

To avoid risk of damage to compressor windings,

immediately disconnect (unplug) test cord from power

source if compressor does not start. Damage to

compressor windings occurs if windings remain

energized when compressor is not running.

If compressor runs when direct wired, it is working

properly. Malfunction is elsewhere in system.

If compressor does not start when direct wired, recover

system at high side. After the system is recovered,

repeat compressor direct wire test.

If compressor runs after system is recovered (but

would not operate when wired direct before recovery) a

restriction in sealed system is indicated.

If motor does not run when wired direct after recovery,

replace faulty compressor.

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test

procedures require power to be connected. Discharge capacitor through a 10,000 ohm resistor before attempting

to service. Ensure all ground wires are connected before certifying unit as repaired and/or operational.

WARNING

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Maytag MTB1504ARW Operations Instructions Page 11

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