Tweco PAK 200i - Manual (Page 127)

PAK 200i
Manual 0-5335 APPENDIX A-47
2. Check for power to the high frequency (HF) transformer (T2 in AC 200 XT and PAK 200i; T1 in GCM1000XT)
during the 15 seconds following prefow (ignition phase). Arc starter power comes through the rear panel
circuit breaker CB4, make sure it isn’t tripped.
a. For the GCM1000XT (AC 300XT) 120 VAC from J59-7 & 9 on the power supply rear panel connects to
J58-7 & 9 on the GCM 1000XT. See diagram below. From J58 on the GCM1000XT it goes directly to the
line filter and passes through the filter to primary of T1. During the ignition phase, check for 120 VAC
on the T1 side of the line filter.
b. For AC200XT and PAK 200i the HF transformer T2 has insulated Faston (also known as push on , stab-on,
spade, etc.) on its primary wires. Disconnect these and measure for 1�0 VAC on the harness side during
ignition phase.
3. If 120 VAC not present go to step 4.
a. If 120 VAC is present and still no spark, T1 (T2 in AC200XT) may be bad. Remove power and measure
resistance of T1 (T2 in AC 200XT and PAK 200i) primary and secondary. The primary should measure
about 3-7 ohms. The secondary about 25-35 K ohms. If either measurement not correct replace T1 (T2
in AC�00XT).
b. If T1 (T2 in AC200XT) measures OK, check for shorted capacitors C1-C3 (very unlikely).
4. No 120 VAC to T1 (T2 in AC 200XT and PAK 200i) primary during the ignition phase (15 seconds following
Preflow) check for 120 VAC into the line filter (GCM1000XT only). If it’s there replace the filter. If 120 VAC
isn’t present at the line filter or if this is an AC 200XT and PAK 200i go to step 5 in section Either Arc Starter
below.
Arc starter without Spark Gap (Ultra-Cut)
1. Check for power to the RAS 1000XT’s Ignition Module during the 15 seconds following preflow (ignition
phase). Arc starter power comes through the rear panel circuit breaker CB4, make sure it isn’t tripped.
a. During the ignition phase, measure for 1�0 VAC at the input terminals marked 1�0 VAC on the Ignition
module, a gray rectangular box with screw terminals on one side.
WARNING!
Do not let the meter probes (or your hands) come in contact with the other terminals marked Hb and Ho or the other
end of the wires connected to them. These can have 10,000 volt pulses which can cause physical harm and will
damage your meter.
�. If 1�0 VAC is not present go to step 3.
a. If 1�0 VAC is present and still no spark, the Ignition Module may be bad.
3. 120 VAC to the remote Arc Starter comes from J59-7 & 9 on the power supply rear panel and connects to
J58-7 & 9 on the RAS1000XT. Remove the cable from J59 and during the ignition phase measure for 120 VAC
between pins 7 & 9.
a. If 120 VAC is present problem is in the cable to the RAS 1000 XT or the J58 connector and internal harness
in the Arc Starter.
b. If 1�0 VAC is present proceed to the next step.
4. 120 VAC to J59 comes from the relay board J8-3 with return on pin 11. On the Relay board, RF ON LED,
D�3, should be on during the igniting phase. If it is not skip to the next step.
a. If D23 is on and there is not 120 VAC at J8-3 & 11 then the Relay board is bad.