McQuay MCK030A Manual de instalación descargar pdf (Pagina 53)

Page 52

The LED indicator on the control panel:

FAN MODE

SLEEP LED Status Analysis

AUTO HIGH MED LOW COOL DRY HEAT FAN

OFF ONLY ONE ON ON OFF OFF OFF OFF -

Normal

Cooling

ON ONLY ONE ON ON OFF OFF OFF OFF - Auto fan cooling

OFF OFF OFF OFF OFF ON OFF OFF OFF - Dry mode

OFF ONLY ONE ON OFF OFF ON OFF OFF - Heating

ON ONLY ONE ON OFF OFF ON OFF OFF - Auto fan heating

OFF ONLY ONE ON OFF OFF OFF ON OFF - Fan

ON ONLY ONE ON OFF OFF OFF ON OFF - Auto fan

OFF ONLY ONE ON ON OFF FLASH OFF OFF - Auto cooling

ON ONLY ONE ON ON OFF FLASH OFF OFF - Auto fan and auto cooling

OFF ONLY ONE ON FLASH OFF ON OFF OFF - Auto heating

ON ONLY ONE ON FLASH OFF ON OFF OFF - Auto fan and auto heating

OFF OFF OFF OFF FLASH OFF OFF OFF OFF -

Fault

Compressor overload

OFF OFF OFF FLASH OFF OFF OFF OFF OFF - Room sensor missing

OFF FLASH OFF OFF OFF OFF OFF OFF OFF -

Outdoor water sensor

missing

OFF OFF FLASH OFF OFF OFF OFF OFF OFF - Indoor coil sensor missing

OFF OFF OFF OFF OFF OFF OFF OFF FLASH - Refrigerant leak

---------FLASH

Water or compressor

problem

By means of pressure readings:

PRESSURE

PROBABLE CAUSE

Data

Circuit

TOO

LOW

TOO

HIGH

High pressure side

Low pressure side

1. Overcharged with refrigerant;

2.Non-condensable gases in refrigerant circuit;

3. Too warm condenser water;

4. Insufﬁ cient water ﬂ ow (cooling);

5. Outdoor coil dirty (cooling);

6. Air ﬁ lter clogged/dirty (heating).

High pressure side

Low pressure side

1.Poor compression/no compression (compressor defective);

2.Reversing valve leak (heating).

High pressure side

Low pressure side

1. Undercharged with refrigerant;

2. Refrigerant leak;

3. Too low evaporator water;

4. Insufﬁ cient water ﬂ ow (heating);

5. Outdoor coil dirty (heating);

6. Air ﬁ lter clogged/dirty (cooling).

The most common causes of air conditioner failure to “start” are:

1. Voltage ﬂ uctuation not within ±10% of rated voltage.

2. Power supply interrupted.

3. Control settings improper.

4. Air conditioner is disconnected from main power source.

5. Fuse blown or circuit breaker off.

6. Improper temperature of water loop (water temperature below 13 °C or above 43 °C).

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McQuay MCK030A Manual de instalación Pagina 53

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