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6. Basket Lift malfunctions.
The probable causes of each category are discussed in the following sections. A series of
Troubleshooting Guides is included at the end of the chapter to assist in identifying some of the
more common problems.
1.9.1 Pilot Failures
There are two categories: no pilot flame and unreliable flame.
No pilot flame
1. No gas or insufficient gas supply
2. Clogged pilot orifice
3. Air in gas lines ( usually in new installations)
Unreliable flame
1. Open or grounded high limit
2. Loose/corroded wire connections
3. Low or no voltage out of thermopile
4. Bad gas valve
1.9.2 Problems Related to the Gas and/or Electrical Current
CONTROL CIRCUIT FOR THE 35 SERIES MILLIVOLT IGNITION SYSTEM
2C
1C
8050438B
THERMOSTAT
OPERATING
FENWALL
ROBERTSHAW
HONEYWELL 1/2 P.S.I.
1/2 P.S.I.
HONEYWELL
OFF
ON
PILOT
C
HONEYWELL
1/2 P.S.I.
ADJ.
PILOT
OFF
4
0
0
3
5
0
3
0
0
2
5
0
2
0
0
OPERATING
THERMOSTAT
HI-LIMIT
THERMOSTAT
PILOT
GENERATOR
INSET 1
SAFETY DRAIN
SWITCH
INSET 2
ON/OFF
SWITCH
(OPTIONAL)
17C
17C
12C
IN LINE SPLICE
IN LINE SPLICE