McQuay MWSS Anleitung zur Fehlerbehebung PDF herunterladen (Seite 62)

MCQUAY Service Guide Book Diagnosis

Multi Split Inverter – Y Outdoor Unit

Model Board

M5MSY 20/25/30 BR -

The outdoor unit LED indicates the running condition of the system:

LED INDICATION

Description

Green Red

A 1 2 3 4

● ● ● ●

NORMAL

INSTALLATION ERROR

ANTIFREEZE (OTHER ROOMS)

● ● ● ○

HEAT SINK OVERHEAT

● ● ○ ●

IPM ERROR / IGBT ERROR

● ● ○ ○

INSUFFICIENT GAS

● ○ ● ○

AC INPUT OVER CURRENT

● ○ ○ ●

COMPRESSOR STMRT-UP ERROR

● ○ ○ ○

COMMUNICATION ERROR (OUTDOOR CONTROL PCB AND IPM PCB)

○ ● ● ●

4 WAY VALVE ERROR

○ ● ● ○

DC VOLTAGE OUT OF RANGE

○ ● ○ ●

COMPRESSOR MOTOR LOCK / COMPRESSOR OVERLOADED

○ ● ○ ●

DISCHARGE PIPE OVERHEAT

○

●

○

ANTIFREEZE (COOLING) / HEAT EXCHANGER OVERHEAT (HEATING)

HEAT EXCHANGER OVERHEAT

○ ○ ● ●

COMPRESSOR SENSOR SYSTEM ERROR

COMPRESSOR FEEDBACK DETECTION ERROR

AC CURRENT SENSOR ERROR

OUTDOOR AIR THERMISTOR SHORT/OPEN

COMPRESSOR DISCHARGE PIPE THERMISTOR SHORT / OPEN /

MISPLACED

OUTDOOR HEAT EXCHANGER THERMISTOR SHORT/ OPEN

LIQUID PIPE THERMISTOR SHORT/ OPEN

GAS PIPE THERMISTOR SHORT/OPEN

HEAT SINK THERMISTOR SHORT / OPEN

○ ○ ● ○ OUTDOOR CONTROL BOX OVERHEAT

○ ○ ○ ●

OUTDOOR PCB ERROR

○ ○ ○ ○

OUTDOOR DC FAN MOTOR LOCK

Blinks

●

Off

○

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