LAARS SUMMIT SMB-250 - Users Manual - Manual (Page 7)

SUMMIT Page 7
Identifies
Appliance Flow Temp (Supply)
Outdoor Air Temp
Calculated Set Point
On
Off
Lock Out
Third Failure (Failure Level)
Fault Code (Three) There are 7
different Fault Codes defined.
Freeze Protection
To read or change mode
During operation display will default to supply
temperature. Press temperatures button repetitively.
To sequence through three temperature indicators.
Appliance in standby mode: will change to bFt on call
for heat.
Appliance switched OFF. Press ON/OFF button for “ON”.
After three trials for ignition, will stand in lockout. Press
reset on top of panel to retry.
To monitor, press and hold temperature button for five
seconds. Display will indicate first of eight fault memories
(FL1). Then display one of seven fault conditions that
occurred previously. Display will sequence through the
eight memories.
Sensor has detected return temperature below 39°F (4°C).
Figure 3. Typical Display Identification Codes.
Message
1H. Trouble Shooting - Fault Codes
The Summit boiler is controlled by a Pactrol
integrated boiler control (PCB) which provides seven
fault codes with eight memories. To obtain fault
messages press-in on the message center fault button
until the first fault code (FL1) is displayed. The last
recorded fault will appear e.g. F-4 (flow thermistor
faulty - open or shorted). The control will then
sequence through all eight memories, indicating
alternately the fault number and the fault code (FL1,
F-?; FL2, F=?; …, FL8, F=?). The fault number in
fault code FL1 is the most recent fault.
1H-1. Fault Code Identification
The following seven fault codes may be observed:
F-
Error corrected, control in auto reset period
(10 seconds)
F-0 No fault has occurred
F-1 Error occurred while reading fault logic of
main control
F-2 Over heat thermostat (Boiler or Flue) has
operated (open circuit)
F-3 Fan fault
F-4 Flow thermistor faulty (open or short-
circuited)
F-5 Differential Pressure Switch Contacts
opened