Honeywell 191108AJ Owner's Manual - Page 21

VoltageAtTimerTerminals

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VoltageAtTimerTerminals AC Voltages at C-C Terminals 0 Vac. Up to 15 Vac. 15 to 30 Vac. Check - System power off. - Short in timer power supply wiring. - Limit switch contacts stuck open. - Transformer supplying power is burned out. - System transformer used to power the timer is inadequate. - Additional (separate) transformer used to power the timer has inadequate voltage. - Spring fingers on thermostat not making proper contact with subbase terminals. - Timer has failed. Action - Restore power. - Replace wiring. - Free or replace limit switch. - Replace transformer. - Use additional (separate) transformer. - Install transformer with proper secondary voltage. - Rebend spring fingers to a 45 degree angle to assure proper contact. - Replace thermostat. 21 69-0643-1

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21
69-0643—1
VoltageAtTimerTerminals
ACVoltagesat
C-CTerminals
Check
Action
0 Vac.
— System power off.
— Restore power.
— Short in timer power supply wiring.
— Replace wiring.
— Limit switch contacts stuck open.
— Free or replace limit switch.
— Transformer supplying power is
— Replace transformer.
burned out.
Up to 15 Vac.
— System transformer used to power
— Use additional (separate)
the timer is inadequate.
transformer.
— Additional (separate) transformer
— Install transformer with proper
used to power the timer has
secondary voltage.
inadequate voltage.
15 to 30 Vac.
— Spring fingers on thermostat not
— Rebend spring fingers to a 45
making proper contact with subbase
degree angle to assure proper
terminals.
contact.
— Timer has failed.
— Replace thermostat.