Imc Board; Imc Board Tests; Imc Board Diagnostics; Imc Board Removal - GE GFWS2500 Technical Service Manual

IMC Board

Operating Voltage: 120 VAC
Location: See IMC Board Location on page 35.
The IMC board is two electronic systems in one
board. One part of the IMC board converts 120 VAC
into high voltage three phase DC to drive the mo-
tor. The other part of the board converts 120 VAC
to lower voltage DC voltages that are used by other
components in the washer. The IMC also contains
relays that operate the various other loads.

IMC Board Tests

• Enter Service Mode.
• Run Test 07 for MC Software Version.
• Run Test 09 for Inverter Software Version.
• Run Test 19 for MC Critical Software Version.
• Run Test 20 for Inverter Critical Software Version.

IMC Board Diagnostics

1. Check for 120 VAC at IMC J101 pins 2 & 3.
a. If 120 VAC is present, go to step 2.
b. If 120 VAC is not present, check house supply
voltage.
2. Check for 12 VDC between IMC J603 pins 1 & 4
and 7.5 VDC at IMC J603 pins 1 & 3.
a. If both voltages are present, go to step 3.
b. If either voltage is not present, replace IMC
board.
3. Check for pulsating DC voltage between IMC J603
pins 1 & 2.
a. If pulsating DC voltage is present, IMC board
is ok.
b. If pulsating DC voltage is not present, replace
IMC board.

IMC Board Removal

1. Disconnect power to the unit.
2. Remove the control panel. (See Control Panel
Removal)
3. Remove the top panel. (See Top Panel Removal)
4. Remove the three 1/4" IMC screws.
5. Slide the IMC board slightly away from the side
panel to disengage the IMC board mounting
studs. Mounting studs are shown below.
6. Remove the pressure sensor hose from the
pressure sensor and from the IMC channel.
47
1/4" Hex
1/4" Hex
1/4" Hex
Rear View