Ricoh SAVIN D0AP Service Manual page 637

Fan Operation
Fan Operation for Each Mode
This machine is designed for low-noise operation, especially at ambient and low temperature,
and when the machine is in Low Duty mode, each fan motor runs at low speed or stops, and
can even print when the machine is in noise suppression mode. The noise suppression mode
can be turned ON/OFF with SP1-953-001 (Fan Low Noise Mode: OFF/ON). Default: ON.
Each fan operates based on the temperature readings of the temperature/humidity sensor
(S11) (T) and the PSU thermistor (Tp).
Machine mode PCDU cooling fan (right)
During Warmup Stop
During Standby T<30°C
30°C≤T<40°C
40°C≤T<42°C
42°C≤T<44°C
44°C≤T
Standby (fusing Stop
OFF)
During PCDU Printing Mode
cleaning and
toner supply
Printing Printing Mode
During PCDU 100%
cooling
Error status (door Stop
open, paper jam,
SC code issued)
SM
PSU cooling fan
(FAN1)
Stop
30% Tp<78°C
50%
70% 78°C≤Tp
90%
100%
Same as "During
Standby" above.
Same as "During
Standby" above.
Printing Mode
High speed (100%)
Same as "During
Standby" above.
7-75
Air Flows (Fan Control)
PCDU cooling fan (left)
(FAN3)
Stop
Stop T<34°C
Low 34°C≤T<40°C Low
speed
(50%)
40°C≤T
Stop
Printing Mode
Printing Mode
High speed (100%)
Stop
D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1
(FAN2)
Stop
speed
(50%)
High
speed
(100%)