14
2. Freezer
7)
Startup/Cool Down–
MH and PH energize. There is a slight delay, then Comp, ConFM,
and EvapFM energize. Cabinet temperature appears on display. Once DTh cools to
32
°
F (0
°
C), 4-hr. Comp cumulative run timer starts.
a)
MH and PH Diagnosis
: Confirm MH and PH energize. Check for 115VAC at MH and
PH. If 115VAC is not present, confirm power supply and continuity of power switch.
If 115VAC is present, check amp draw of MH and PH. If an amp reading is not
present, check continuity of MH or PH. If open, replace MH or PH.
b) Cabinet Light:
FGY CL
:
Diagnosis
: Open the door confirm 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 one 1
CLS (BK) wire and not the other, confirm 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 confirm 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), confirm 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.
c)
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, confirm 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.
d)
EvapFM Diagnosis
: Confirm EvapFM energizes. If not, confirm 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.
