62
PART 7. SERVICING
Code
Cause
Recommended Action
P05
Water flow too low through appliance
Check for partially closed valves, pump impeller fouling etc.
P06
Water flow blocked during a burn cycle (proof of flow)
Check for partially closed valves, pump impeller fouling etc.
W04
Minimum water pressure
Water pressure too low (within 10% of minimum pressure required), confirm cause and correct.
(TABLE 7-3) BCB HARD LOCKOUT (HLO) CODES (continued)
NOTE:
In many cases, a “hard lockout” will indicate that there is something wrong with the appliance, that should be
serviced or repaired.
EXAMPLE:
If there is a loss of flow due to an air bubble passing through the appliance (sensed via the water pressure transducers),
the appliance will shut down and display a temporary fault of P04 or P05 A, B, or C. When flow resumes and a waiting
time has elapsed, the control board will perform a pre-start diagnostic and then resume a burn cycle.
F. TO TURN OFF GAS TO THE APPLIANCE
1. Set the thermostat to lowest setting.
2. Turn off power switch on front of unit.
3. Turn off all electric power to the appliance if service is to be performed.
4. Turn gas shutoff valve clockwise to “off.” Handle will be horizontal. Do not force.
G. PUMP & WIRING CONTROL
The appliance control board has an on-board relay for controlling the circulating pump. On a call for heat, the pump
will start, allowing the water flow proving circuit to be made and the pre-start diagnostic to continue. After the call for
heat has been satisfied, the pump will continue to run for the factory programmed period of time (1 minute) and then
shut off. For water heating applications an external temperature sensor must be mounted in the water storage tank.
For heating applications, the call for heat must come from an external source (room thermostat etc.).
Содержание XL800
Страница 6: ...6 PART 1 GENERAL INFORMATION As a Stand Alone Appliance HOT CONTROL MENU NAVIGATION ...
Страница 7: ...7 PART 1 GENERAL INFORMATION Appliance as Part of a Cascade HOT CONTROL MENU NAVIGATION ...
Страница 19: ...19 PART 2 ELECTRICAL B INTERNAL WIRING CONNECTION continued XL BCB LAYOUT ...
Страница 21: ...21 PART 2 ELECTRICAL XL CASCADE BOX ...
Страница 31: ...31 PART 4 VENTING Direct Vent Terminal Clearances ...
Страница 32: ...32 PART 4 VENTING Direct Vent Terminal Clearances continued Other Than Direct Vent Terminal Clearances ...
Страница 33: ...33 PART 4 VENTING Other Than Direct Vent Terminal Clearances continued ...
Страница 69: ...69 PART 10 PARTS BREAKDOWN 1A 1B PART 10 PARTS BREAKDOWN 2 ...
Страница 70: ...70 PART 10 PARTS BREAKDOWN 3 4 5 6 7 8 9A 9B 9C 10 4 ...