Carrier 40CS024 Bedienerhandbuch PDF herunterladen (Seite 17)

TROUBLESHOOTING

Table 6—Indicator Lamps Troubleshooting

LAMPS STATUS INDICATION CORRECTIVE ACTION

POWER flashes 10 seconds after A/C

start-up (with or without other signal lamps)

Communication problem.

• Check connection between indoor

(TAC-440) and outdoor (TAC-420) units (for TAC-400, ANC).

• Check connection between TAC-444 and TAC-460 (for TAC-404).

POWER, COMPRES. and PRESSURE

lamps flash.

Thermistor failure.

• Check TH-1 for correct resistance.

• Check for proper connection between TH-1 and TAC-444.

• Replace TH-1 if necessary.

POWER, COMPRES. and IMPEDANCE

lamps flash.

Thermistor failure.

• Check TH-2 for correct resistance.

• Check for proper connection between TH-2 and TAC-444.

• Replace TH-2 if necessary.

POWER lamp flashes and PRESSURE

is lit, AIR CON is Off.

Low Pressure

• Check if the filters are clean.

• Check TH-1 and TH-2 for correct resistance.

• Check cooling system for normal operation.

POWER and PRESSURE lamps flash,

AIR CON is Off.

High Pressure.

• In Heat mode: Check if the evaporator is blocked. (Check if filters

are clean.)

• Check TH-2 (in Heating mode) or TH-3 (in Cool mode) for correct

resistance.

• Check cooling system for normal operation.

FILTER is lit. Filter cleaning. • Clean all filters.

POWER, IMPEDANCE lamps flash,

COMPRES. is lit.

Low voltage.

• Check power supply voltage.

• Check electrical connections.

• Replace TAC-444.

POWER lamp flashes, IMPEDANCE

and COMPRES. lamps lit. AIR CON

lamp flashes after A/C start-up.

Voltage failure at start-up.

• Check power supply voltage.

• Check electrical connections.

• Replace TAC-444.

POWER lamp flashes, IMPEDANCE

and COMPRES. are lit before A/C startup.

High Voltage.

• Check power supply voltage.

• Check electrical connections.

• Replace TAC-444.

POWER lamp flashes, IMPEDANCE and

COMPRES. are lit. AIR CON is lit

after A/C startup.

High voltage during compressor operation.

• Check power supply voltage.

• Check electrical connections.

• Replace TAC-444.

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