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Home›Repair guides›Figure 2. “W” Type PCB

Generac — Figure 2. “W” Type PCB

For these Generac models: CTTS STYLE CONTACTOR ASSEMBLY 600-2600 AMP, CTTS Style CONTACTOR Assembly (100-400 Amp), CTTS Style CONTACTOR Assembly (600-2600 Amp), CTTS Style Contactor Assembly, W Style CONTACTOR Assembly, Wn STYLE CONTACTOR ASSEMBLY 600-2600 AMP, Wn Style CONTACTOR Assembly (100-400 Amp), Wn Style CONTACTOR Assembly (600-2600 Amp).

Applies to: Generac Ctts Style Contactor Assembly 600 2600 Amp, Generac Ctts Style Contactor Assembly, Generac W Style Contactor Assembly, Generac Wn Style Contactor Assembly 600 2600 Amp

Procedure

  1. 1. Remove the cover on the contactor assembly.
  2. 2. Using a multimeter (set to ohms scale), measure the resistance of the coil as follows and compare the results to the chart provided below.
  3. 3. On the J3 block, measure the resistance between the red wire (blue covering) and the white wire (yellow covering).
  4. 4. Measure resistance from the red wire (blue covering) to the white wire (blue covering)/red wire (yellow covering).
  5. 5. Measure resistance from the white wire (yellow cover­ ing) to the white wire (blue covering)/red wire (yellow covering).
  6. 6. If proper resistance values were not measured in Steps department or replace coil). If proper resistance values were measured, proceed to Step 7.
  7. 7. Remove the screw from the PCB and unplug the harness

Source: manual:Generac GTS Trouble Shooting - 0H3949-A2.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.