34
Operation Display
Heating
The room does not get warm.
The heating does not operate.
• Is the gas valve, return valve and supply valve fully open?
•
Is the gas being cut off by the gas meter?
(Can other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank?
(Can other gas devices such as stoves be used?)
•
Is the water drain valve filter clogged with debris
?
( page 30)
• Is the power button turned on?
• Is the heating switch of a room thermostat turned on?
• Can the sound of the pump be heard? If not, there may be a
malfunction. Contact your installer or a qualified service technician.
• Increase heating temperature setting.
The fan can be heard after
operation is stopped.
A motor can be heard when turning the unit ON
or OFF, when opening or closing a fixture, or
after the unit has been running for a while.
• These noises indicate the proper operation of devices
which are designed to let the unit reignite more quickly,
and ensure the water temperature is stable.
Sounds
The fan can be heard when it is
very cold outside.
• The unit may operate freeze prevention.
During freeze prevention, is lit on the Operation
Display.
Rotating sound.
(low humming sound.)
• The sound is from the pump operating to prevent freezing.
• The unit automatically operates the pump for several seconds
when the unit has not been used for approximately 30 days to
prevent the pump from malfunctioning due to build-up of deposits.
The clock display is blinking.
• In the event of a power outage or after disconnecting
power to the Combi Boiler, when power is restored the
clock time will blink.
•
If you find the clock blinking, readjust the clock. (
page 13)
The clock display shows
“- : - -”.
• If the time has not been set, The clock display shows
“- : - -”. ( page 13)
The power ON/OFF indicator
does not light up.
• Has there been a power failure?
• Is the power connected properly?
The temperature setting cannot
be changed when a button is
pressed.
• The temperature setting is locked.
While the temperature setting is locked, the temperature
setting cannot be changed. ( page 21)
Troubleshooting-2
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