McQuay MLCV Guía para resolver problemas descargar pdf (Pagina 45)

Insufficient Cooling

High Discharge Pressure or Low

Suction Pressure

Dual Pressure

Switch

Compressor

Cycling

Overcurrent

Relay For

Compressor

Clogged Capillary or Pressure

Switch

Switch Faulty

High Voltage or Low Voltage

Discharge Gas

Thermostat or

Internal

Thermostat

Single-Phase

High Discharge Pressure And

High Suction Pressure

High Discharge Pressure And

Low Suction Pressure

Refrigerant Short Charge or

Refrigerant Leakage

See "High Discharge Pressure" or

"Low Suction Pressure"

Repair clogging and replace the

switch if required

Repair or change if necessary

Get the right voltage

Check the power line to the

compressor : repair when necessary

High Suction Pressure

High Discharge Pressure or Low

Suction Pressure

See "High Suction Pressure"

Running

Tripping

Cycling On

Tripping

Loose Connections

See "High Discharge Pressure"

or "High Suction Pressure"

Tighten the connections

See "High Discharge Pressure"

or "Low Suction Pressure"

Add refrigerant. Repair

leakage if detected.

See "High Discharge Pressure"

or "Low Suction Pressure"

43 44

Noisy Operation

Unremoved Shipping Bolt(s)

Evaporator

Fan

Compressor

Overcharged Refrigerant

Low Suction Pressure

Worn Compressor Parts

Knocking Runner

Worn Bearing

Refrigerant Short Charge

Remove the bolt(s)

Purge the refrigerant

See "Low Suction Pressure"

Replace or repair the compressor

Fix the runner or casing properly

Noisy

Partially Clogged Clean the dryer

Add refrigerant

Change the bearing

Liquid Line

Shipping

Bolt(s)

Liquid

Refrigerant

Backing Up

Noisy

Inadequate Duct Work

Loose Fixed Screws Tighten all fixed screws

Check flexible ducts

Noisy

Strainer

Whistling

Insufficient Cooling

Noisy Operation

General Trouble Shooting Guide - 1

When any air conditioner malfunction is noted, immediately switch off the power sup-

ply to the unit, and contact the local dealer, if necessary. Some simple troubleshooting

tips are given below:

Fault Cause

1. Compressor does not work * Protection against frequent starting.

3 minutes after starting. Wait for 3 to 4 minutes

2. The unit does not work. * Power failure or need to replace the

fuse

* The power plug is disconnected.

* It is possible that your delay timer has

been set incorrectly.

* If the fault persist after the verifications,

contact your installer.

3. The air flow is too low * The air filter is dirty

* The door and windows are opened.

* The air intake and discharge area are

clogged.

4. The remote control light is dim. * Battery flat.

* Batteries are incorrectly inserted or

misplaced.

5. Air discharge flow has bad odour * Odours may be caused by cigarette,

smoke particles, perfume etc. which

adhere to the coil.

* Check if there is any moisture on the

wall, garment, and others.

* Check the drain pan

6. Condensation on the front panel. * This is due to air humidity after a long

time operation.

* The set temperature is too low.

Increase the temperature and change it

to high fan.

7. Hissing sound during operation. * Refrigerant flow into evaporator coil.

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McQuay MLCV Guía para resolver problemas Pagina 45

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