Maintenance
34
Sequence of Operation
After preheat the control can be operated in ManuĆ
al Mode or in one of the
100 programs
. Each proĆ
gram can have up to 6 steps and a hold. In each
step the user can program Core Probe (Yes/No),
Cook Time, Mode (Steam/Combi/Reth/Hot A), Set
Temp, Fan Speed (Gentle/Low/High/Turbo), Fan
Reverse (Manual/Auto), Fan Reverse Time, and
Vent Setting (Close/Open).
If Core Probe is "Yes", the unit will look for the reĆ
sistance at the probe port on the front on the conĆ
trol. If Fan reverse is set to Auto, the control will auĆ
tomatically reverse the fan every 2 minutes while
a time counting down. If it is set to manual, the reĆ
verse time can be set. Also the Cook Time, Cook
Mode, Set Temp, Fan Speed, as well as Vent posiĆ
tion, can be programmed for each step. When the
Vent
is opened, D24 LED lights and 24 VDC is sent
by K5 on the grey wire at J2.4; no voltage is presĆ
ent when the vent is closed.
If operating in
Manual Mode
, you can manually
modify the Fan Speed, the Vent Position, Core or
Cavity Probe, Time and Temp, Steam on Demand
(not functional in steam mode) and the Cook
Modes: Hot Air, Combi, Steam, and Retherm.
Hot Air
uses the "call for heat" sequence menĆ
tioned above.
Combi
uses the same call for heat and the Water
Spritzer is cycled at 33% for the default setting, or
20 seconds on 40 Seconds off. The cycle rate can
be adjusted from 0 to 100%. When the
Water
Spritzer
is called for, D33 is lit, and K8 sends out
24 VDC on the Violet wire at J18.3.
Steam
uses the same call for heat and the Spritzer
is cycled at 100%. In steam the lowest temperature
setting is 85?F and the maximum temperature in
the steam mode is 225?F. Steam on demand is not
available in Steam mode because the control is
cycling the Spritzer at 100% already.
Retherm
uses the Water Spritzer at a 25% duty
cycle, or 15 seconds on 45 Seconds off, and the
call for heat is set at 250?F as the default temperaĆ
ture. The Water Spritzer cycle rate can be adjusted
from 10 to 90% and the Temperature can be set to
250 - 300?F.
When the
Control calls for the fan
to go Forward,
J2.11 will have 23 VDC return and J2.12 will have
0 VDC. That condition will invert when the fan call
is for Reverse; J2.12 will have 23 VDC return and
J2.11 will have 0 VDC. The speeds are set by J2.9
and J2.10. 0 VDC on both is Gentle Speed, J2.9
with 23 VDC return and J2.10 with 0 VDC is Low
Speed, J2.9 with 0 VDC and J2.10 with 23 VDC reĆ
turn is High Speed, and 23 VDC return on J2.9 and
J2.10 is Turbo Speed.
The
Cooling Fan
is controlled by the probe loĆ
cated under the Inverter heat sink; it is cycled on
at 100?F. When the Cooling Fan is called for, K4
Relay sends 24 VDC out at J3.11 on a grey wire,
and the call is indicated by LED D26. The Cooling
Fan is also activated at any time the timer is countĆ
ing down.
Cook Done
is not used. Therefore no wire is loĆ
cated at J2.2, where K14 sends 24 VDC when D21
is lit. However, Cook Done is activated when the
Timer goes off on the control.
