16 May 73
Symptom: DXF-19, DXH-19, MGC-19 – ERROR CODE P1
Solution: MULTIPLE SOLUTIONS
Cause: OVER VOLTAGE OR TOO LOW VOLTAGE PROTECTION
Remarks:
DESCRIPTION:
ABNORMAL INCREASES OR DECREASES IN VOLTAGE ARE DETECTED BY CHECKING THE SPECIFIED VOLTAGE DETECTION CIRCUIT.
REPAIR:
1) CHECK THE POWER SUPPLY:
IS IT FUNCTIONING PROPERLY?
NO = TURN OFF THE UNIT
YES = CHECK 2)
2) CHECK THE CONNECTIONS AND WIRES:
ARE THEY FUNCTIONING PROPERLY?
NO = ENSURE PROPER CONNECTIONS OR REPLACE THE WIRES
YES = CHECK 3)
3) TURN ON POWER AND MEASURE THE VOLTAGE BWTWEEN P AND N:
WHILE THE UNIT IS ON STANDBY, IS THE VOLTAGE BETWEEN P AND N AROUND DC 310V, 340V OR 380V? AND WHEN THE UNIT STARTS UP, IS IT IN 220V-400V?
NO = REPLACE THE IPM BOARD
YES = CHECK 4)
4) CHECK THE REACTOR:
IS IT FUNCTIONING PROPERLY?
NO = REPLACE THE OUTDOOR PCB
YES = REPLACE THE REACTOR
YES = CHECK 2)
YES = CHECK 3)
YES = CHECK 4)
YES = REPLACE THE REACTOR