HEIL F8MVL Installation Instructions Manual page 52

START
Is AMBER LED status light ON solid,
alternately flashing bright-dim-bright-dim
like a heartbeaL or flashing ON and
OFF?
YES
Is AMBER LED status light ON solid?
NO
Is AMBER LED status light alternately
flashing brighbdim-bright-dim like a
heartbeat?
NO
Determine status code. The status code
is a single or two digit number with the
first number determined by the number of
short flashes and the second number
after the plus (+) sign is the number of
long flashes?
1
Go to section below for the status code
that was flashed.
1
Troubleshooting Guide - ICP Variable Speed
p I--_ Is door switch closed i YES
I I-'_ I Is there 115V gOing tO switch?
YES
I I Replace do°r switch
-4
Is there 115Vat L1 and L2?
_ YES
Is there 24V at SEC-1 and SEC-2?
NO _ YES
._ Is the 24V fuse open?
4l YES
Replace fuse then disconnect thermostat
leads to isolate short circuit.
Replace transformer. ]
-4
I
Replace furnace control. I
Check to make sure that the correct
model plug PL4 is installed. The wiring
schematic shows all valid model plugs.
Is the correct model plug installed?
_ NO
Replace model plug PL4.
The control is locked out and will auto-
reset after 1 hour. Lockout could be due
to any of the following:
- Flame sense circuit failure.
- Gas valve relay stuck open.
- Software check error.
Reset power to clear lockout. Replace
control if code repeats.
The last status code has cleared. To
recall a previous status code disconnect
the R thermostat connection, reset
power, and put setup switch SWI-1 in
the ON position. The AMBER LED will
flash the status codes in the order of
occurrence. Record status codes until
heartbeat flashes. After heartbeat
flashes several times the status codes
will repeat. Status codes are erased
after 72 hours or can be manually erased
by putting setup switch SWI-1 in the ON
position and jumpering R, W/W1, and
Y/Y2 simultaneously until the heartbeat
flashes. When done put setup switch
SWl-1 in the OFF position.
Was there a previous status code other
than the heartbeat?
I
Does the control respond to W/W1, W2,
Y1, Y/Y2, and G (24V) thermostat
signals?
YES
Run system through a low-heat, high-
heat, or cooling cycle to check operation.
Status codes are erased after 72 hours
or can be manually erased by putting
setup switch SWI-1 in the ON position
andjumpering R, W/W1, and Y/Y2
simultaneously until the heartbeat
flashes.
Replace furnace control.
Close the door switch.
I-_ Is circuit breaker closed?
YES
J Check for continuity in wire from circuit
breaker to furnace.
Close circuit breaker and go back to
START.
Check room thermostat or
interconnecting cable.
T.o
t_ s 24V present at W/W1, W2, Y1, Y/Y2 or
G thermostat terminals on the furnace
control?
YES
Disconnect all the thermostat wires from
the furnace control.
_ oes the problem reieat when using a
jumper wire?
NO
The thermostat is not compatible with the
furnace control Either install a ballast
resistor, connect the Com24V thermostat
terminal to the thermostat, or replace the
thermostat
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