OM-DH/INA/2-100 23
Troubleshooting
System does not produce a
spark.
Authorized
Service Rep Only
a.
Thermostat, and close the contacts if they are open. X
b.
AC voltage between terminals “2” and “GR”. If it is not 24 Volt:
(1) Check high limit switch, which should be closed. X
(2) Replace the transformer. X
c.
Pilot spark gap. Regap, if it is not 7/64 inch. X
d.
Pilot electric ceramic for crack or break. X
e.
That the high tension cable is firmly attached and in good
condition. If cracked or brittle, replace the pilot. X
f.
Replace the electronic portion of the G60 electronic system. X
Spark is present but the
pilot will not light.
Authorized
Service Rep Only
a.
That the pilot valve is securely connected to terminals “1” and
“GR”. Some models have the pilot valve grounded internally. X
b.
That gas pressure meets the control manufacturer’s
specifications. X
c.
For gas at the pilot. If it is not flowing:
(1) Check the pilot gas line for kinks and obstructions. X
(2) Replace the pilot valve. X
d.
That the pilot spark gap is 7/64 inch and located in the pilot gas
stream. If not, adjust or replace the pilot. X
e.
Pilot orifice, and clean, if necessary. X
f.
For drafts. Shield the pilot burner, if necessary. X
Pilot lights, but main burner
will not come on, and
spark does not stay on.
Authorized
Service Rep Only
a.
For 24 V between terminals “3” and “GR”. If voltage is not
correct, replace the G60 electronics. X
b.
That the gas pressure meets the control manufacturer’s
specifications. X
c.
Electrical connections to the main valve to terminals “3” and
“GR”, to assure that they are securely attached. If they are,
replace the main valve.”
Pilot lights, but main burner
will not come on, the spark
stays on.
Authorized
Service Rep Only
a.
Sensor cable, to make sure of secure and attachments to the
sensor and to terminal “4” the G60. X
b.
That the cable is not grounded. If it is, correct the ground fault. X
c.
Cable for continuity and insulation condition. X
d.
Sensor ceramic for cracks. X
e.
That sensor probe current is less than 0.7 microamp, by
disconnecting the sensor cable from terminal “4” and
connecting a DC microammeter between the sensor cable
terminal and terminal “4”. If the current is equal to or greater
than 0.7 microamp, replace the G60 electronics. X
If the current is less than 0.7 microamp:
(1) Check the gas pressure. X
(2) Clean the pilot assembly. X
(3) Tighten mechanical and electrical connections. X
f.
Pilot application and correct to increase sensor probe current,
by:
(1) Increasing or decreasing pilot orifice size. X
(2) Shielding the pilot from drafts. X
