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TROUBLESHOOTING
Does the power switch provide
power to the control panel?
Step 1
YES
YES
Step 2
Is Disable connection intact?
YES
Does the combustion air
Step 3
blower come on?
Is 4-20mA present at the quick
disconnects on the black and blue
wires of the tem p erature controlle r ?
YES
Is 24VAC at the NC side of
Step 4
the air pressure switch?
YES
Is 24VAC at PS on ignition module?
Step 5
Is connecting plug secure?
YES
Ste p 6
Does i g niter p rove?
YES
Ste p 7
Is the flame sensor signal to the
i g nition module g reater than 1 uA DC?
YES
Ste p 8
Is the unit runnin g ?
YES
Ste p 9
The unit is oka y
California Hot Water Supply, Inc.
NO
Is there a Call For
Heat?
NO
Reattach.
Is there 120VAC at the blower or
NO
blower relay?
YES
NO
YES
Does F2 on ignition module
NO
have AC p owe r ?
Is blower pressure setting
NO
NO
Is Amp draw during heat-
NO
up for HSI greater than
3.1 Amps?
YES
NO
Is static and dynamic inlet gas
pressure correct?
NO
Call our Technical Service Department
1-800-947-2975 Outside California
1-800-627-2975 Inside California
Check the switch and/or
line voltage
NO
Unit is in standby mode.
NO
Is diagnostic board
indicating open
safeties?
YES
Is there continuity in the wire
between F2 and Pin J5-6?
NO
(vacuum) correct?
YES
Replace air pressure switch.
Correct wiring.
NO
Is air switch bouncing?
Is gas pressure correct?
YES
NO
Replace gas valve
YES
(800) 249-7244
Check and correct power
connections at main terminal
block, circuit breaker panel or
blower relay.
Replace temperature
NO
controller.
Correct Safet y
Repair or
NO
Re p lace wire.
Check filter,
Correct the shutter
setting or blower
amp draw.
Replace HSI
NO
YES
NO
Correct the gas pressure.
49
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