6 C-7355 Electromechanical Series 7-Day Time Clocks Product/Technical Bulletin
Setting On/Off Events
The dial face shows the seven days of the week and the
a.m./p.m. markings for each day. Each day contains 12
captive trippers. Each tripper represents a 2-hour block of
time. Up to 84 On/Off events can be programmed per week.
Push the captive trippers to the outer ring position for the
entire period of time that the load is to be turned On. Push
the captive trippers to the inner ring position for the entire
period of time that the load is to be turned Off.
Manual Override
The manual override switch can be positioned to allow
automatic, permanent On, or permanent Off control. See
Figure 9.
When the manual override switch is in the automatic
position “ ”, the time clock switches the load On and Off
according to the programmed events.
When the manual override switch is in the permanent On
position “I”, the time clock turns the load On and overrides
all programmed events. The clock remains
in the On position until the manual override switch is placed
in the automatic or permanent Off position.
When the manual override switch is in the permanent Off
position “0”, the time clock turns the load Off and overrides
all programmed events. The clock remains in the Off
position until the manual override switch is placed in the
automatic or permanent On position.
Power Failures
In the event of a power failure, the C-7355-7 does not
operate. The time and day of the unit must be reset once
power is restored.
The C-7355-8 uses a built-in Ni-Cad battery for backup. In
the event of a power failure, the outputs are disabled but the
time clock maintains clock operation and programmed
events for up to 150 hours.
Repair Information
Field repairs must not be made. For a replacement time
clock, contact the nearest Johnson Controls representative.
Troubleshooting
Table 2: Troubleshooting
Symptom Possible Cause Corrective Action
Clock does not
function…Supplyvoltage is incorrect Use a voltmeter to check the voltage between terminals 1 and 2. Voltage
should be between 102 and 132 VAC.
Load does not switch
correctly…Time clock wiring is incorrect Refer to the Wiring section for correct wiring of the time clock.
Manual override switch is in the Off
(0) position Place the manual override switch in the automatic position.
Damaged contacts Use an ohmmeter to check the resistance difference of the switch terminals.
Position the manual override switch to “I”. The resistance between the COM
and NO contacts should be less than 1 ohm. The resistance between the
COM and NC contacts should be infinity. Place the manual override switch
to the “0” position. The resitance between the COM and NO contacts should
be infinity. The resistance between the COM and NC contacts should be less
than 1 ohm. If the resistance is incorrect, replace the unit.
Clock time is off by
more than what is
specified…
120 VAC line frequency is not 60 Hz
(C-7355-7 only) Contact the power company to correct the line frequency
(C-7355-7 only).
Quartz unit failure (C-7355-8 only) Replace the unit (C-7355-8 only).
