Ricoh D124-17 Service Manual page 721

If the temperature exceeds HM at power on, the maintenance cycle will not execute, the
machine will enter standby mode and wait for the machine to fall below HM, and then
normal operation will be restored.
[20 to 50/46.5/0.5 °C]
3 High-Resume HL
When the machine reaches the operation temperature HL after the power is turned off,
machine operation will resume after power on.
[20 to 50/46.5/0.5 °C]
4 Low-Resume LH
Once the temperature to LH due to intervention by the operator by cycling the machine
off/on, normal operation is restored.
[1 to 20/1/0.5 °C]
5 Low-Detect LM
If the exceeds LM at power on, normal operation will be restored once the temperature
rises above LM, but if below LM the machine will enter standby and the maintenance
cycle will not execute.
[1 to 20/1/0.5 °C]
6 Low-Stop L
If the exceeds L at power on, normal operation will be restored once the temperature
rises above L the machine will enter standby and the maintenance cycle will not execute.
[1 to 20/1/0.5 °C]
1018 Internal Temperature Detection DFU
SP1000
17