Whenever a fault is detected in any of the sensors, the
control LEDs will flash in a specific way, to indicate the
location of the problem, and the control will assume a
specific operating condition.
•
Call For Heat LED is flashing (Fig 9A):
–
Then the outdoor sensor is short or open
circuit
–
And the control assumes an outdoor
temperature of 30°F
•
Pump Performance Reduced LED is flashing
(Fig. 9B):
–
Then the system supply sensor is short
or open circuit
–
And the control runs pump at 10% and
does boiler protection if enabled.
•
Call For Heat and Pump Performance Reduced
LEDs are flashing (Fig. 9C):
–
Then the boiler return sensor is short or open
circuit
–
And the control disables boiler protection.
Page 18
Figure 9B - Control Lights
(Pump Performance Reduced)
Figure 9C - Control Lights (PPR & CFH)
Figure 9A - Control Lights (Call For heat)
9.
Error Messages and
Control Response
