Hurricane SCH25, Руководство по обслуживанию и устранению неисправностей

Страница: 18 / 41

Page 14
• The diagnostic
9
code will be displayed.
• The control board will purge the system with the combustion fan and
circulating pump for two minutes.
• If the remote switch is put in the ON position, the control board will
resume operation and a small red LED will glow near the lower right
hand corner of the digit. If there is no diagnostic code displayed or
small LED glowing:
ƒ
Make sure the service switch is ON.
ƒ
Make sure the remote switch cable is plugged into the control
box and remote switch.
ƒ
Make sure the remote rocker switch is working.
ƒ
Check the cable continuity.
3.6.
<
- Heater Cycling (Normal Operation)
The operating aquastat installed on the water jacket has been satisfied.
• The burner will shut down.
• The diagnostic code,
<
will be displayed.
• The control board will purge the burner with the combustion fan for
two minutes and then stop. The circulating pump will run until the
last thermostat is satisfied, then purge for two minutes and stop.
• To maintain the system temperature the operating aquastat will cycle
the burner off at 170 ° F (77 ° C) and on again at 140 ° F (60 ° C).
• If the heater cools and fails to resume operations and the diagnostic
code
<
continues to be displayed, the aquastat is faulty or has an
open connection.
3.7.
T
- Thermostats Off (Normal Operation)
All thermostats and aquastats are satisfied.
• The burner will shut down.
• The diagnostic code,
T
will be displayed.
• The control board will purge the system with the combustion fan and
circulating pump for two minutes. When any thermostat or aquastat
calls for heat, the heater will resume normal operation.