Vanguard Heating POWERMAX PM200 - Manual (Page 19)

17
TROUBLE SHOOTING
CAUTION: Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
PROBLEM CAUSE REMEDY
3. On-Off switch
powered, Unit does
not operate.
a. No power to heater.
b. Manual reset Hi-limit
tripped.
c. Vent fan interlock not
proving (if auxiliary
power vent or E-Z
Vent system) is
being used.
a. Check circuit breaker
b. Manually reset hi-
limit. Determine
cause. If hi-limit trips
again, call service.
c. Turn on fan, check
switch.
2. Unit energized,
blower not operating,
pump not operating,
burner(s) not on.
a. Fan defective.
b. Fan relay defective
or wiring
disconnected.
a. Check, replace fan.
b. Check, correct.
c. Check, clean air filter
3. Unit energized,
blower and pump
operating, burner(s)
are NOT on, ignition
control LED flashing.
a. Igniter Defective
b. Water flow switch
not proving.
c. Air flow/flue
blockage switch not
proving.
d. Control relay(s)
defective.
e. Control sensor(s)
defective.
f. Control board
defective
g. Ignition control
defective.
h. Burner flame not
proving
a. Replace igniter or
call Service
b. Check, replace flow
switch.
c. Clear flue. Repair or
replace switch,
d. Call Service
e. Call Service
f. Call
Service
g. Call Service
h. Check, replace flame
sensor
4. Unit energized,
blower on, pump not
operating, burner(s)
NOT on.
a. Pump defective
b. Relay defective a. Call Service
b. Call Service
Note: For service and/or parts call your authorized service agency or the
factory @ 1-800-624-4809