3-2
TROUBLESHOOTING
Models C712/C713
Troubleshooting
3
General Troubleshooting Guide
Table 3-1
Problem
Probable Cause
Remedy
1. Compressor will not run.
a. The power switch is in the OFF position.
a. Place the switch in the ON position.
b. An error has been made in key pad
selection.
b. Press the correct key for Auto operation.
c. The contactor is faulty.
c. Replace the contactor.
d. The compressor has burned out.
d. Replace the compressor.
e. The fuse or circuit breaker has blown.
e. Replace the fuse or turn on the breaker.
f. Tripped overload (compressor).
f. Place the power switch in the OFF position.
Allow the compressor to cool and the
overload to close before returning the power
switch to the ON position.
g. Off on reset (beater motor).
g. Press the reset button.
2. Machine operates long
(cycles off on the 11
minute safety timer.
a. Dirty condenser.
a. Clean the condenser.
b. Scraper blades are worn.
b. Replace scraper blades.
c. Shortage of refrigerant.
c. Repair the leak and recharge the machine.
d. Air in the system.
d. Purge and recharge the system.
e. High overrun product (C712).
e. Check pump operation for correct air/mix
ratio.
3. Head pressure is too
high.
a. Condenser is dirty.
a. Clean condenser.
b. Water valve is out of adjustment or is
restricted.
b. Check the adjustment and the water supply.
c. Insufficient air space around machine.
c. Make sure there is sufficient air space
surrounding the machine (see
“Specifications”).
d. Refrigerant overcharge.
d. Correct refrigerant charge.
e. Blower is faulty.
e. Replace the blower.
4. Head pressure is too low.
a. Refrigerant shortage.
a. Repair leak and recharge.
5. Liquid line is hot.
a. Shortage of refrigerant.
a. Repair leak and recharge.
6. Excessive mix leakage
through the rear of the
unit into the drip pan.
a. Worn or missing drive shaft seal.
a. If worn, nicked, or missing, replace the drive
shaft seal.
b. Inadequate lubrication.
b. Lubricate properly.
c. Drive shaft rotates forward.
c. Check gear alignment.
7. Low overrun.
a. Bad scraper blades.
a. Replace scraper blades.
b. Faulty air/mix pump components (C712).
b. Inspect air/mix pump components and
replace those found faulty.
c. Restricted air intake (air/mix pump) (C712).
c. Clear restriction.
d. Long ON cycles.
d. See problem 2.
Summary of Contents for C712
Page 9: ...INTRODUCTION 1 5 Models C712 C713 Introduction 1 Figure 1 1 ...
Page 11: ...INTRODUCTION 1 7 Models C712 C713 Introduction 1 Figure 1 2 ...
Page 22: ...1 18 INTRODUCTION Models C712 C713 Introduction 1 Notes ...
Page 42: ...2 20 CONTROLS Models C712 C713 Controls 2 Control Overview UVC4 Figure 2 58 ...
Page 48: ...2 26 CONTROLS Models C712 C713 Controls 2 Refrigeration Schematic Figure 2 62 ...
Page 50: ...2 28 CONTROLS Models C712 C713 Controls 2 Notes ...
Page 60: ...3 10 TROUBLESHOOTING Models C712 C713 Troubleshooting 3 Notes ...
Page 120: ...6 10 WIRING DIAGRAMS Models C712 C713 Wiring Diagrams 6 Notes ...
