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98 PB

TROUBLESHOOTING

Malfunction of Power Supply from Indoor to Outdoor Unit

Energize the unit

and wait for 3min

Voltage > 200V?

Measure voltage between

N 1and 3 of indoor

wiring block

Measure voltage

between L and N

of outdoor wiring

block

Normal wiring?

Voltage > 200V?

Indoor main board error

Adjust wiring

Outdoor electric

box error

indoor and outdoor

wiring error

Replace main board

of indoor unit

Replace outdoor

electric box

Replace indoor

and outdoor wiring

Remove malfunction

Inspect the power supply plug seat wit hAC voltage guage to check if voltage between L and N is within 200VAC-240 VAC.

Check with AC voltage gauge if the voltage between N1 and 3 of indoor wiring block is within 200 VAC-240AC

Friedrich MRM09Y1J Service & Parts Manual

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