»Phantom Troubleshooting»TS-18: Boiler Not Responding To Demand For Heat Or H/W

TS-18: Boiler Not Responding To Demand For Heat Or H/W

Does the display show:
– “Standby”
– “Central Heat”
– “Domestic H/W”

Standby Central Heat Domestic H/W

#B6

Standby normally means there is not a demand recognized by the boiler. Press the “Status” button. Press the left arrow key and move one or two screens dependent on the display version, to the “Heat Demand” display. Does the display show any demands as “On”?

Yes No

#I6

This may be normal. Go to the “Status” screen, the first two lines are “Supply Temp” and “Setpoint Temp”. Is the supply temp near higher than the setpoint temp?

Yes No

#S6

This is normal. The setpoint temp is lower than the boiler supply temperature. The display will show standby but the circulator(s) will run. Are the proper circulators running?

Yes No

#S14

The control shows there is no demand on the boiler. Remove the thermostat wires on central heat terminals or DHW terminls. Place a jumper between these terminals. Does the “Heat Demand” display change to “On”?

Yes No

#Z6

Your heat or DHW demand that you had to the boiler prior to jumping the terminals were not closing the two terminals. Make repair to your boiler demand.

Done

#AH6

There is no problem recognized.

Done

#Z14

Go to troubleshooting the circulators. Which circulator is giving you a problem?

DHW Central Heat

#Z17

Is this a heat or DHW demand?

Heat DWH

#Z23

Verify there is a DHW demand. Check 24V on the low voltage PC board Lower DHW & C terminals. Is 24Vac available?

Yes No See Test

#Z28

Is there voltage from the “C” terminal on the low voltage PC board to solder connection #5. Is there 24Vac available?

Yes No See Test

#Z35

Is there 24Vac between J8-2 & J7-7 on the Sage control?

Yes No

#Z43

Check left side of the fuse to Heating T-Stat terminal “C”. Is there a 24Vac reading?

Yes See test

#Z49

Check the upper DHW to C terminal for 24Vac. Is 24Vac avaialble.

Yes No See test

#Z55

Is the flow switch on the combi kit wired to the DHW terminals on the low voltage PC board?

Yes No

#N28

Re-wire the flow switch to the DHW terminals. Did the problem resolve?

Yes No

#N35

When the domestic hot water is turned on is the faucet moving at least 1/2 gpm?

Yes No

#N42

Increase the water flow at the faucet. The flow switch is rated for a minimum of 1/2 gpm. Problem resolve?

No

#N48

Is this DHW demand for an IWH tank or a combi kit on a PHNTM150 or PHNTM180 boiler?

Combi Tank

#T28

Verify the aquastat is turned up enough to create a demand for DHW.

Next

#T39

If the light is steady there is no demand on the tank. Turn the temperature up on the control. Light flashing?

Yes No

#T45

Check 24V on the low voltage PC board terminals W & C. Is 24Vac available?

Yes No See test

#AH13

Check 24V on the low voltage PC board terminals R & C. Is 24Vac available?

Yes No

#AH20

Is there voltage from the “C” terminal on the low voltage PC board to solder connection #4. Is there 24Vac available?

Yes No See test

#AH27

Is there 24Vac between J8-2 & J8-3 on the Sage control?

Yes No

#AH35

Check left side of the fuse to Heating T-Stat terminal “C” . Is there a 24Vac reading?

Yes No

#AH41

No demand from the tank aquastat

Done

#AH49

Is there an error code on the home screen?

Yes No

#AO6

Thermostat, zone panel or zone valves are not demanding heat

#AO20

Replace the Low voltage PC board

Done

#AO27

Replace Sage2 control

Done

#AO35

Replace boiler harness

Done

#AO39

Please contact Technical Support to resolve this issue.

Contact

#ZZ1

#A109

#A146

#A209

#A268

#A326

#A394