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®
THE ENGINEER’S KEY
The engineer’s key is a hidden key under the Fireye logo on the display. With the use of the engi-
neer’s key it is possible to read the values of internal system variables and external input and output
states. It is also possible to see the values of fault subsets (refer to Fault Listing for details), in order
to obtain more detailed information about a fault which has occurred.
When using the engineer’s key it is not possible to change any parameters. Therefore, it is not possi-
ble to affect the operation of the burner.
ENGINEER’S KEY PARAMETER LIST
NO
NAME
DESCRIPTION
EK1
Digital Input 3 (oil select)
Shows the state of each input.
Where:
0 = OFF
1 = ON
EK2
Digital Input 2 (gas select)
EK3
Safety Input C
EK4
Safety Input D
EK5 Safety
Input
E
EK6
Fault Mute
EK7
Safety Input A
EK8
Safety Input B
EK9
Air Flow Input
EK10
Air NO Flow Input
EK11
Burner Select Input
EK 12
Primary Air Flow
EK 13
Primary Air NO Flow
EK 14
Undefined
EK15
Track Input 2
0 - Not tracking PE21 input
1 - Tracking PE21 input
EK16
Warming Limit Active
0 - Measured value above warming limit, burner free to modulate
1 - Measured value below warming limit, burner held at low fire if the unit is
in auto or sequencing mode.
EK17
PID SP Selected 1/2
Indicates which setpoint the unit is currently operating from.
EK18
Boiler Status
0 - Burner will not fire because the temperature/pressure measured value
has exceeded the high control value.
1 - Burner will fire because the temperature/pressure measured value has
fallen below the low control value.
EK19
Confirm to Adjust
0 - Unit not in commission mode or unit is in commission mode and drives
moving to setpoints.
1 - Unit in commission mode and drives may be adjusted using the UP/
DOWN keys.
EK20
Drive Moved
0 - Unit not in commission mode or unit is in commission mode and drives
have not been moved using the UP/DOWN keys.
1 - Unit in commission mode and drives have been moved using the UP/
DOWN keys.
EK21
Positions Proved
0 - Drives have stopped moving, ready for position prove test.
1 - Ready for position prove test but drives still moving.
EK22
Fault Alarm Relay
0 - Fault alarm relay off.
1 - Fault alarm relay on.
EK23
Serial Communications Status
+1 - Toggles on message received
+2 - Serial communications passcode correct, or in commission ratio mode
+4 - Boiler sequencing passcode correct
