Honeywell Q682B Owner's Manual - Page 22

Voltage At Clock Terminals

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Voltage At Clock Terminals AC Voltge at C-C Terminals 0 Vac. Up to 15 Vac. 15 to 30 Vac. Check Action 1. System power off. 1. Restore power. 2. Short in clock power supply wiring. 3. Limit switch contacts stuck open. 4. Transformer supplying power is burned out. 2. Replace wiring. 3. Free or replace limit switch. 4. Replace transformer. 1. System transformer used to power 1. Use additional (separate) transformer. the clock is inadequate. 2. Install transformer with proper secondary 2. Additional (separate) transformer voltage. used to power the clock has inadequate voltage. 1. Spring fingers o thermostat not making proper contact with subbase terminals. 2. Clock has failed. 1. Rebend spring fingers to a 45 degree angle to ensure proper contact. 2. Replace thermostat. 69-0574-2 22

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69-0574—2
22
Voltage At Clock Terminals
AC Voltge at
C-C Terminals
Check
Action
0 Vac.
1.
System power off.
2.
Short in clock power supply
wiring.
3.
Limit switch contacts stuck open.
4.
Transformer supplying power is
burned out.
1.
Restore power.
2.
Replace wiring.
3.
Free or replace limit switch.
4.
Replace transformer.
Up to 15 Vac.
1.
System transformer used to power
the clock is inadequate.
2.
Additional (separate) transformer
used to power the clock has
inadequate voltage.
1.
Use additional (separate) transformer.
2.
Install transformer with proper secondary
voltage.
15 to 30 Vac.
1.
Spring fingers o thermostat not
making proper contact with
subbase terminals.
2.
Clock has failed.
1.
Rebend spring fingers to a 45 degree
angle to ensure proper contact.
2.
Replace thermostat.