Thermal Dynamics PAK Master 150XL, Руководство по обслуживанию

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SERVICE TROUBLESHOOTING 4-8 Manual 0-2728
5. Actual input voltage is not within the specified range.
This unit is designed to be operated from 380-415V, 3-
Phase input power.
a. Check actual line voltage
6. Defective input power cable
a. Replace input power cable
7. Fuse blown inside Power Supply
a. Replace internal Fuse (F1)
8. Faulty Auxiliary Transformer (refer to Appendix 12,
36 VAC Circuit Diagram)
Measure for 36 VAC on Logic PC Board from J1-1
to J1-5.
a. If voltage is not present, replace the Auxiliary
Transformer
9. Faulty ON/OFF switch (refer to Appendix 12, 36 VAC
Circuit Diagram)
Measure for 36VAC on the Logic PC Board be-
tween J3-2 to J3-4.
a. If voltage is not present replace the ON/OFF
switch
10. Faulty Logic PC Board (refer to Appendix 12, 36 VAC
Circuit Diagram)
Measure for 36 VAC on Logic PC Board from J5-1
to J5-3.
a. If voltage is not present, replace the Logic PC
Board
D. AC indicator ON, TEMP indicator ON, RUN/SET
Switch is in RUN position, System will not pilot
1. Air flow through unit is restricted
a. Provide adequate air flow (Refer to Operating
Manual, Section 3.02)
2. Exceeded duty cycle of Power Supply
a. Wait for fans to cool unit and (Refer to Section
2.03 for proper Duty Cycle)
3. Fans not operating
Measure for 115 VAC on the Logic PC Board from
J96-1 to J96-3 and J96-2 to J96-4.
• If voltage is correct, replace Fan Assembly
• If voltage is incorrect, replace Logic PC Board
4. Faulty temperature circuit
a. Check temperature circuit per Section 4.10-H;
repair as necessary
5. Defective Logic PC Board
On Logic PC Board remove J4 and J2 connectors
a. If TEMP Indicator stays ON then replace Logic
PC Board
E. AC indicator ON; TEMP indicator OFF; No gas
flow; GAS and DC indicators OFF
1. RUN/SET switch in RUN position
a. Switch to SET position
2. Gas supply not connected to unit
a. Connect to gas supply
3. Gas supply not turned on
a. Turn gas supply on
4. Faulty RUN/SET switch
a. Check continuity
5. Faulty gas solenoid circuit
a. Test gas solenoid circuit per Section 4.10-I; re-
pair as necessary
F. AC indicator ON; GAS indicator OFF; Gas flows;
DC indicator OFF
1. Gas pressure too low
a. Set pressures above 35 psi (2.4 bar) limit of
Plasma Pressure Switch
2. Faulty pressure switch
Measure for DC voltage from wire #51 to wire #50
at the gas Pressure Switch at the rear of the Rear
Panel Assembly.
a. If 12 vdc is present and pressure is above 35
psi (2.4 bar), replace gas Pressure Switch.
Wire #51
Wire #50
Gas Pressure Switch
Rear Panel
Gas Solenoid
A-01184