Icemaker Troubleshooting Guide; No Ice/Low Ice Production; Icemaker, Modular - Sub-Zero 700 Series Service & Parts Manual

TROUBLESHOOTING GUIDE
WARNING! Disconnect power to icemaker before attempting repairs.
CAUTION! Do not attempt to jump start the icemaker through any ports other than "T" & "H".
Probing the other ports while the unit is powered my cause the icemaker to short out.
Note: For detailed information on the modular icemaker, see the Icemaker Service Manual.
Complaint
No ice/low ice 1. Freezer not cold enough.
production
1. No run when jumped between "T" & "H"
2. Open thermostat.
3. No power to icemaker.
4. Jammed cube.
5. Little or no water to icemaker.

ICEMAKER TROUBLESHOOTING GUIDE

Possible Cause
2:00 ejector position (PARK):
ports.
5a. Frozen fill tube (leaky water valve, inoper-
ative fill tube heater).
5b. Kinked water line between water valve &
fill tube.
5c. Water line to unit obstructed.
5d. Clogged screen in water valve.
5e. No power to water valve.
5f. Low water pressure (must be between
20 - 120 psi).
NOTE: jump between "T" & "H" ports for 10
seconds. Remove jumper & catch water.
Should be 130cc's.
5g. High water pressure (must be between
20-120 psi).
5h. Open heater circuit (ports "L" & "H" = 72
ohms).
5i. Closed thermostat.
1. See GENERAL TROUBLESHOOTING
GUIDE.
1. Replace icemaker modular head.
2. Check/replace thermostat (apply fresh
alumilastic).
3. Trace power, repair wiring.
4. Unjam cube and check fill cup and fill
alignment tube.
5a. Check/replace water valve,
check/replace fill tube heater or repair
wiring.
5b.Un-kink water line or replace.
5c.Clear obstruction.
5d.Replace water valve.
5e.Trace power, check wiring, repair
wiring.
5f.Increase supply water pressure.
5g.Decrease supply water pressure.
5h.Replace mold and heater assembly.
5i.Check/replace thermostat (apply fresh
alumilastic).
5-14
Correction