Laars MASCOT LX, Service Manual

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Mascot LX Service Manual
E003 – Flame present when not expected (not in Run)
There has been a lockout because the controller detected a flame when the unit
was not running.
• Check the wiring to the flame sensor.
• If the wiring is OK, replace the flame sensor. See Section B16.
• If this does not restore normal operation, replace the SIT control board. See
Section B30.
E004 – Outlet auto-reset hi limit
There has been a lockout because the water outlet temperature sensor reported
too high a temperature.
• Check the wiring to the water outlet temperature sensor.
• Check the sensor function, and replace it if necessary. See Section B4.
• If this does not restore normal operation, replace the control board. See
Section B30.
E005 – Water pressure switch error
There has been a lockout because of the problem with the water pressure
switch.
* Check the water supply to the unit. The switch will not close unless 5 psi of
water pressure is present.
• Check the wiring to the system water pressure switch.
• If the wiring is OK, replace the switch. See Section B10.
• If this does not restore normal operation, replace the control board. See
Section B30.
E006 – Safety switch – not used
E007 – Low water cutoff error
There has been a lockout because the optional low water cutoff switch reported
a low-water condition or is open.
• Check the water supply.
• Check the LED’s on the front of the optional low water cutoff switch. See
Section B19. The system will present this error if the switch is open (low
water condition.)
• Check the wiring to the low water cutoff switch.
Lockout Codes (continued)
A2