TurboChef TORNADO Service Manual page 32

22 THE CONTROL SYSTEM
ISSUE
F1: Blower Running
Status Bad
Motor not running
when commanded.
F3: Magnetron Current
Low
F8: Heat Rise Low
: This message
N O T E
occurs in
WARM UP
if the oven fails
SELF TEST
to warm up in the prede-
termined time period.
RESOLUTION
1. Status Indicator "A" is highlighted/backlit in
Verify 208 or 240 (USA) / 230 (Intl) / 200 (Japan) / 220 (Latin America)
VAC is going to the motor controller via pins 2 and 3.
208/240/230 VAC is present: Verify control wiring from the motor
controller and I/O control board, specifically low-voltage wire OR-9.
If all wires are OK, then refer to page 50 for motor controller
troubleshooting.
208/240/230 VAC is not present: Correct wiring going to the motor
controller. Also, check fuses.
2. Status Indicator "A" is still highlighted in
Refer to page 50 for motor controller troubleshooting.
1. Ensure the K2 mechanical relay is in good working order.
If relay is OK, refer to pages 34-35 (
detailed troubleshooting.
1. Verify the high-limit thermostat is not tripped.
If high-limit is tripped, reset and allow the oven to warm up.
If high-limit is not tripped, proceed to instructions below.
and
High-limit thermostat is not tripped:
Check both K4 and K5 SSRs by activating them in
and
HEATER
go to 0.00 VDC. When the relay is not actuated, the input will read
-24.00 VDC.
If the control voltage is not pulled down during actuation, verify
the wiring between SSR and I/O control board. Replace SSR if wiring
is OK.
If the control voltage is pulled down: Refer to Figure 37 on page 47.
). When actuated, the (-) control input of the SSR will
IR ELE
.
TEST MODE
.
TEST MODE
3:
F MAGNETRON CURRENT LOW
TEST MODE
) for
(activate