Repair
38
313221M
Control Board
Power Bootup Check
Control Board Replacement
2.
Remove access cover (8) at back of control module
to expose control board (406).
3.
Disconnect all cables and connectors from board.
Remove two jumper wires (413) from J10 pins 7-8
and 9-10.
4.
Remove screws (408) and remove board from con-
trol module.
5.
Install new board in reverse order.
There is one red LED (D11) on the board. Power
must be on to check. See F
IG
. 12 for location.
Function is:
•
Startup: 1 blink for 60 Hz, 2 blinks for 50 Hz.
•
Motor running: LED on.
•
Motor not running: LED off.
•
Status code (motor not running): LED blinks
status code.
Check motor before replacing board. See Elec-
tric Motor, page 43.
1.
See Before Beginning Repair, page 32. Relieve
pressure, page 21.
Apply thermal compound between the square
steel piece on the back of the board and the main
aluminum plate. Order Part No. 110009 Thermal
Compound.
Table 5: Control Board Connectors
(see F
IG
. 12)
Board
Jack
Pin
Description
J1
n/a
Main power from breaker
J2
n/a
Function knob
J3
n/a
Transducer A
J4
n/a
Motor power (230 V units)
J7
1, 2
Motor thermal overload signal
J8
n/a
Transducer B
J9
n/a
Fan
J10
1, 2
Status indicator
3, 4
Not used
5, 6
Cycle switch signal
7-8
Jumpered
9-10
Jumpered
J11
n/a
Motor power (120 V)
J14
n/a
B temperature display
J15
n/a
A temperature display
Summary of Contents for 313221M
Page 59: ...Technical Data 313221M 59...