Power Supply Voltage Imbalance

Error Code P1

Applicable

Models

REYQ-T

Method of Error

Detection

Detect voltage imbalance through PCB.

Error Decision

Conditions

When power supply voltage imbalance exceeds approximately 12 V.

Error is not decided while the unit operation is continued.

“P1” will be displayed by pressing the inspection button.

Supposed

Causes

Open phase

Interphase voltage imbalance

Defective capacitor in the main circuit

Defective inverter PCB

Defective magnetic relay

Defective wiring in the main circuit

Note: ∗1. Make measurement of voltage at the power supply terminal block (X1M).

∗2. Make measurement of voltage at the L1, L2 and L3 terminals of diode module located on the inverter PCB during the compressor is in operation.

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