TROUBLESHOOTING 4-18 Manual 0-2957
Nominal
Input Voltage
Contactor
Points
Voltage
Range
208/230VAC L1, L2 187-253VAC
400VAC L1, L3 360-440VAC
415VAC L1, L3 370-460VAC
460VAC L1, L3 414-506VAC
Contactor Voltage Readings
Art # A-03194
Main Contactor
#13
#5
L1 L2 L3
T1 T2 T3
To E3
Connections to
Main PCB
#4
#12
To E1
To E2
Input Side
L1
L3
L2
400 / 415 / 460 / 600-Volt Main Input Contactor
(Three-Phase Input Power Shown)
Art # A-03212
L1 L2 L3 L4
T1 T2 T3 T4
#13
#12
#78
L1
L2
Input
Side
#5
#4
#3
#2
#1
Main Contactor
208/230-Volt Main Input Contactor
2. Check for 28 VAC at J23-1 to J23-3 on the Main PC
Board.
a. If greater than 30 VAC, input line power is too
high.
b. If there is no AC power, check the fuse. If the
fuse is okay, the auxiliary transformer is faulty.
Replace the Main PC Board.
E. Gas Solenoid Circuit Test
Make the following voltage checks and replace the faulty
part as required.
1. Place the RUN / RAPID AUTO RESTART / SET
Switch to the SET position.
2. Measure for 28 VAC across Solenoid wires #8 and
#9. Refer to System Schematic in Appendix Sec-
tion.
• If 28 VAC is present, replace Solenoid/Pressure
Switch Assembly.
• If 28 VAC is not present, check for 65 psi (4.5
bar) at the pressure regulator.
3. Check for less than 2 vdc at P1-7 to TP1 on Logic
Board.
• If less than 2 vdc, replace Main PC Board.
• If more than 2 vdc, replace Logic PC Board.
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