Genuine Toshiba owner's manual. Couldn't really ask for more. And written in understandable English in contrast to a few recent experiences I have had with manuals for other equipment other than Toshiba but made in China and written in "Chinglish"!
Text excerpt from page 14 (click to view)
The heat necessary for the operation of an absorption cooling unit is supplied by an electric heater mounted in a pocket of the boiler system. This model is equipped with a series connected twin heater. To replace the heater proceed as follows: 1. Disconnect the wall plug, and the 12 volt wires. 2. Remove the protection cover see FIG. 1 3. Remove the power module cover see FIG. 1 4. Disconnect the heater leads. 5. With a pair of pliers unfold the lug holding the lid of the boiler casing and open the lid. 6. Remove some insulation wool so that the heater is accessible. 7. Turn and lift the heater out of its pocket. 8. Fit the new heater into the pocket. 9. Connect the leads and put on the power module cover. 10. Reset the insulation and close the lid of the boiler. 11. Replace the protection cover.
See wiring diagram
DISCONNECT 120 V AC AND 12 V DC POWER BEFORE SERVICING To replace fuses proceed as follows. 1. Disconnect the wall plug, and the 12 volt wires. 2. Remove the power module cover. See FIG. 1. 3. Snap the fuse out of the fuse holder. 4. Fit a new fuse in to the fuse holder. 5. Replace the power module cover.