5-Service (See Technical Manual)
This key should not be pressed during normal
TEMPEST 50
operation.
If the key is pressed accidentally enter a service code of 000000 to return
to the previous screen. If an incorrect code is entered reply to any
prompts by selecting no using the return key to return to the previous
screen.
6-Pump (On / Off)
Pressing this key will toggle the pump between the on and off states. The
appropriate message will then be displayed as shown below:
P U M P
O N
