Service Guide

22
2a. Freezer: Auxiliary Code F-7 and Earlier
7) Startup/Cool Down–Lights, DrH, MH, and PH energize. There is a slight delay, then
Comp, ConFM, and EvapFM energize. Cabinet temperature appears on display and
4-hr.Comp cumulative run time defrost timer starts.
a) Cabinet Light FGY (FGYCR & FGYCL) Diagnosis: Open the door conrm CLS is
in the ON position. If not, move CLS to the ON position. CLS turns on. If CLS does
not turn on, check for 115VAC at both CLS (BK) wires to neutral(W). If 115VAC is
present on 1CLS(BK) wire and not the other, conrm power supply and continuity of
CLS switch. If power supply is ok, check CLS continuity. IfCLS is engaged and CLS
switch is open, replace CLS. If CLS is engaged, contacts are closed, and 115VAC is
present at CLS(BK) and CL is not energized, replace CL.
FS/HS CL: Diagnosis: Open the door (upper on HS) and conrm CL is energized.
If not, with the door open, check for 115VAC at DSR #5 (BK) to neutral(W) and DSR
#1 (V or Y) to neutral(W). If115VAC is not present at DSR #5 (BK), conrm power
supply and continuity of power switch. If 115VAC is present at DSR #5 (BK) and not
present at DSR #1 (V or Y), check DS continuity. IfDS is disengaged and contacts
are closed (DSR energized), replace DS. If DSR is de-energized and 115VAC is
present at DSR#5(BK) and not at DSR #1 (V or Y) to neutral (W), replace DSR.
If 115VAC is present at DSR #1 (V or Y) and CL is not energized, replace CL.
b) DrH Diagnosis: Conrm amp draw of DrH. If no amp draw available, check for
115VAC to DrH black wire (BK) to neutral (W). If 115VAC is present, check DrH
continuity. If open, replace DrH. If 115VAC is not present, check wiring connections to
DrH.
c) MH and PH Diagnosis: Conrm MH or PH energize. Check for 115VAC at MH or PH
orange wire (O) to neutral (W). If 115VAC is not present, conrm power supply and
continuity of power switch. If115VAC is present, check amp draw of MH or PH. Ifan
amp reading is not present, check continuity of MH or PH. If open, replace MH or PH.
d) CM Diagnosis: Cabinet temperature appears on display. If not, check for 115VAC
at CM L2 (BK) to CM N3 neutral (W). If 115VAC is not present, conrm wiring
connections are secure on CM L2 (BK) (power supply) and CM N3 (W) (neutral).
If115VAC is present and display is off, replace CM.
e) EvapFM Diagnosis: Conrm EvapFM energizes. If not, conrm doors are closed
and DS engaged. Next, check for 115VAC at DSR #8 (LBU or GY) to DSR#7neutral
(W). If 115VAC is not present, check DS continuity. If DS is engaged and contacts
are open, replace DS. If 115VAC is present, check for 115VAC at CM F5(Y or W/BU)
to neutral (W). If 115VAC is not present, replace CM. If115VAC is present, check for
115VAC at DSR #4 (DBU) to neutral (W). If115VAC is not present, check for 115VAC
at DSR #6 (Y or W/BU) to neutral (W). If115VAC is present at DSR #6 (Y or W/BU)
to neutral (W) and not at DSR #4 (DBU) to neutral (W), replace DSR. If 115VAC
is present at DSR#4(DBU) to neutral (W), check EvapFM blades for binding and
EvapFM continuity.