LAARS Mascot ll LMC - Install and Operating Manual - Manual (Page 39)

Mascot II Boilers and Water Heaters Page 37
was reached however the cycle count will
not increment any higher
than 999,999 cycles Replace controller or adjust the count using blue display
50 Maximum hours count Control operates correctly,
was reached however the hours count will
not increment any higher
than 999,999 hours
248 CH outdoor temperature
was invalid
251 CH ODR max outdoor temp- Confirm outdoor reset
erature setpoint was invalid settings. An invalid
252 CH ODR min outdoor temp- adjustment has been
erature setpoint was invalid made
253 CH ODR min water temp-
erature setpoint was invalid
254 CH ODR temperature range Increase Outdoor air temp- Adjust setting to within appropriate range
was too small erature min and max values
(min. 12°C / 22°F) to a difference greater than
22°F (12°C)
255 CH setpoint minus ODR Increase Outdoor water
min water temperature was temperature min and max
too small (min. 12°C / 22°F) values to a difference greater
Increase setpoint or than 22°F (12°C)
decrease min water temp.
565 Heat exchanger T-rise limit Heat exchanger temperature Check for correct water flow
was exceeded rise exceed
MISCELLANEOUS
Boiler will not stay lit Indicates lack of flame signal, Check flame detector wiring; clean / replace flame
check fault code on display detector
Boiler bangs, knocks, hisses Insufficient water flow / Check for proper flow, follow piping guidelines in
pump failure; improper piping manual; replace pump; improper glycol percentage
(see Section 6)
Flame pulsates, venting Insufficient / improper Ensure venting complies with Section 3
noise or has difficulty lighting venting; dirty burner; air in
gas line; dirty heat exchanger
Table 14. Error Codes.
CODE# PROBLEM PROBABLE CAUSE SOLUTION
ALERT CODES