Thermal Dynamics PAK Master 150XL, Руководство по обслуживанию

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Manual 0-2728 5-5 REPLACEMENT PROCEDURES
C. Input PC Board Assembly Replacement
1. Remove the Left Side Panel per Section 5.04-A.
2. Disconnect all cable lug connections to Input
Board, removing star washers and nuts where
applicable.
Connection Description of Cable
A Cable #1 from W Contactor
B Cable #2 from W Contactor
C Cable #3 from W Contactor
E1
Wires #8E from from INR
Contactor Positions L3 & L4
E2
Wires #8E from from INR
Contactor Positions L1 & L2
E3
Wire #9 To E26 on Cap PC
Board 'A'
E4
Wire #9 To E26 on Cap PC
Board 'C'
E7
Wires #8E from INR Contactor
Positions T3 & T4; Wire #8 to
E25 on Cap PC Board 'B'
E8
Wires #8E from INR Contactor
Positions T1 & T2; Wire #8 to
E25 on Cap PC Board 'D'
NOTE
Refer to reverse side of replacement board for con-
nection identification.
3. Remove the clear insulator sheet from the Input
Board.
4. Remove the three screws in top holes connecting
the Input Board to the Bridge Rectifier.
5. Install the replacement Input PC Board by revers-
ing the above procedure noting the following:
• The three screws securing the wiring and In-
put PC Board to the Bridge Rectifier must be
tight enough to prevent the wires from mov-
ing.
NOTE
Failure to properly tighten the three screws secur-
ing the Input PC Board to the Bridge Rectifier will
cause damage to the unit.
• Prior to making cable connections, peel pro-
tective coating off insulator sheet and place
insulator sheet on replacement input board.
D. Input Bridge Rectifier Replacement
1. Remove the Left Side Panel per Section 5.04-A.
2. Remove the Input PC Board per Section 5.06-C.
3. Remove the two nuts securing the Bridge Recti-
fier to the Heatsink.
4. Remove the Bridge Rectifier Assembly from the
unit.
5. Remove the Thermal Pad.
6. Install the replacement Input Diode Bridge As-
sembly, including Thermal Pad by reversing the
above procedure, noting the following:
• Clean Heatsink and back of Bridge Rectifier
surface with a clean rag and alcohol.
• The two nuts removed in Step 3 must be
torqued to 35 in-lbs when reinstalled.
• Install Rectifier with A B C terminals away
from the Thermostat.
E. Thermostat (TS2) Replacement
1. Remove the Left Side Panel per Section 5.04-A.
2. Remove the Input PC Board per Section 5.06-C.
3. Remove two screws securing the Thermostat to
the Heatsink.
4. Install replacement Thermostat by reversing the
above procedure.
F. In-Rush Contactor (INR) Assembly
Replacement
1. Remove the Left Side Panel per Section 5.04-A.
2. Note orientation of all the wires connected to the
Contactor Assembly and label them.
3. Disconnect the wires from the Contactor Assem-
bly terminals.
4. Remove the two nuts and washers securing the
Contactor Assembly to the internal chassis of the
unit.
5. Install the replacement Contactor Assembly by re-
versing the above steps, keeping in mind the fol-
lowing:
• Install Contactor with T1-T4 side towards
heatsinks.