Inverter. GE Consumer & Industrial ZIC360NR, ZICS360NR

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Inverter. GE Consumer & Industrial ZIC360NR, ZICS360NR | Manualzz

Inverter

Warning: Disconnecting the 6-pin connector does not disconnect power (120 VAC) from the inverter. The refrigerator must be unplugged before servicing the inverter.

Note: Certain voltmeters will not be able to read voltage output from the inverter. If no voltage or erratic voltage is measured, it does not necessarily indicate a faulty inverter.

The inverter receives 120 VAC line-in from the power supply. The inverter converts this single-phase,

60 Hz, 120 VAC into 3-phase, 230 VAC, with frequency variations between 57 Hz and 104 Hz. This voltage is delivered to the compressor through 3 lead wires. Each wire will carry identical voltage and frequency. When checking inverter voltage output, connect the test-meter leads to any 2 of the 3 compressor lead wires. The same reading should be measured between any 2 of the 3 wires.

Note: The compressor leads must be connected to measure voltage output. If the compressor wires are not connected, or if an open occurs in one of the 3 lead wires or in the compressor, the inverter will stop voltage output.

The inverter controls compressor speed by frequency variation and by pulse width modulation (PWM).

Changing frequency and PWM will cause an effective voltage between 80 and 230 VAC to be received at the compressor.

• Low speed (1710 rpm) - 57 Hz

• Medium speed (2100 rpm) - 70 Hz

• High Speed (3120 rpm) - 104 Hz J15

The inverter receives commands from the main control board. The main control board will send a (PWM) run signal between 1.5 and 3.5

VDC effective voltage to the inverter. The signal voltage at the inverter should be equal to the signal voltage sent by the main control board.

The inverter will select compressor speed (voltage output) based on this signal. A signal voltage from the main control board (J15 connector ) lower than 5 VDC indicates a faulty main control board.

The main control board will only send a run signal to the inverter when the compressor should be on.

Note: When measuring signal voltage (from the main control board) at the inverter, disconnect the wire harness connector at the inverter and measure the voltage at the connector.

The inverter will monitor compressor operation and if the compressor fails to start or excessive current draw (4 amps maximum) is detected, the inverter will briefly stop voltage output. The inverter will then make 12 consecutive compressor start attempts (once every 12 seconds). If after 12 attempts the compressor has not started, an 8minute count will initiate. After the 8-minute count, the inverter will attempt to start the compressor again. If the compressor starts, normal operation will resume. If the compressor fails to start, this process will be repeated. Removing power to the unit will reset the inverter count. When power is restored, the inverter will attempt to start the compressor within 8 seconds.

The inverter has a built-in circuit protection to guard against damage from a failed or shorted compressor. However, if a failed compressor is diagnosed, order a new compressor and inverter. If the compressor fails to start after replacement, replace the inverter.

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Note: When servicing the inverter, it is important to dress the wiring to keep low-voltage DC wiring and 120 VAC wiring separate.

To remove the inverter:

1. Unplug the unit.

2. Open access cover.

3. Loosen the 2 hex-head bolts that hold the inverter in place.

4. Disconnect the 2 wiring harnesses from the left side of the inverter.

4. Slide the inverter to the right to disengage the holding tabs.

Note: It may be necessary to bend the process tube in order to remove the inverter. If it is necessary to bend the process tube, use extreme care.

5. Slide the inverter out of the machine compartment.

To remove the inverter cover:

Use a small screwdriver to release the two small tabs and carefully remove the inverter cover.

Wiring Harness

Wiring Harness

Bolt

Bolt

Tabs

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