Troubleshooting
16 309574C
No heat in A or B zones Circuit breaker(s) tripped. Reset breaker CB3 or CB4, page 26.
Heat turned off.
Press or zone
keys.
Temperature control alarm. Check temperature displays for diag-
nostic code, page 9.
Defective heater. Replace, page 34. Check resistance.
Loose connectors or wire nuts. Check connections.
Failed temperature control board. Open cabinet. Check if board LED is
blinking. If not, check power wiring
connections to ensure board has
power. If board has power and LED is
not blinking, replace board, page 32.
Low heat in A or B zones A and B temperature setpoints too
low.
Check setpoint. Increase if neces-
sary.
Flow too high. Use smaller mix chamber. Decrease
pressure.
Defective heater. Replace, page 34. Check resistance.
Loose connectors or wire nuts. Check connections.
Low voltage. Check that power supply meets
requirements.
Overheated temperature control
board.
Check fan operation.
Check if door is open; close.
Check that cooling holes are not
clogged or obstructed.
Fluid too cold. Preheat fluid.
PROBLEM CAUSE SOLUTION
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