Guardian PowerVent Training Manual SVC900; Rev 1
Page 18
The LED will have a variety of status conditions:
• ON is defined as constantly on with no blinking patterns.
• Slow Blink is defined as a one blink per second.
• Fast blink is defined as five blinks per second.
• There will be a 1 second period between primary and secondary pattern when LED will
be off. (blink-one second-blink)
• After the secondary pattern completes, there will be a 3 second period when LED will be
off before patterns repeat. (blink-one second-blink - - three seconds - - blink-one second-
blink)
System condition Primary pattern Secondary pattern
Stand-by mode Slow blink None
Call for heat present Fast blink None
Internal control failure/ miswiring ON Solid None
Ignition failure 1 blink 1 blink
Flammable vapors present 2 blinks 1 blink
Flammable Vapor Detector failure/ miswiring 2 blinks 3 blinks
Vacuum switch fails to open 3 blinks 1 blink
Vacuum switch fails to close 3 blinks 3 blinks
Line/ neutral polarity failure 4 blinks 1 blinks
ECO failure 4 blinks 2 blink
False flame 4 blinks 3 blinks
Vacation mode active 5 blinks None
Table 4 – Diagnostic Flash Codes
HOW TO INTERPRET THE FLASH CODES
Solid ON – If the green LED is constantly on, then there is a problem with the internal controls
(computer chip) of the gas valve. It can also mean the thermistor/ECO is disconnected. Ensure
all connections to the valve are tight and correct. Cycle the power to attempt to reset the control.
Slow Flash - Flashing LED indicates normal operation of the controls. This also indicates the
unit is in Stand-By mode and the water inside the tank is hot. There is always a slow flash when
power is applied. If there is no LED, then check for unit plugged in. Check for power at the wall
plug or other source of 120VAC. Verify 120VAC power at the red #4 wire.
Fast Flash – A fast flash indicates there is a call for heat. You should hear the blower motor
running at a minimum.
One (1) Flash / One (1) Flash – Ignition Failure. This means there was no flame rectification of
the pilot. Maximum ignition attempts made. This failure occurs when the control does not see
proper ignition (flame rectification) given the allotted attempts and ignition cycles. (3)
Remember, flame rectification is required before the unit will continue and open the main valve
of the gas valve. The flame rectification circuit proves the presence of pilot flame at the pilot and
To Next Page
Loading...
