44
d)
DrH, PH, and MH Diagnosis: RFH1-SSB(-HS)(-HSE) Freezer:
If heaters do not
energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral (W
wire). If 115VAC is not present, replace CB. If 115VAC is present, check PH/MH
switch. Next, check continuity of heaters.
e)
System Diagnosis:
If Comp, ConFM, and EvapFM are energized and the cabinet
temperature is not dropping on DB, check that CTh is mounted and secured
correctly. If cabinet temperature is not dropping, check for a restriction in the
refrigeration circuit, correct TXV operation, and correct refrigerant charge.
9)
Cool Down Achieved–LED 3 (EvapFM off) is on:
CTh cools to 3°F (1.7°C) below
setpoint. Comp, ConFM, EvapFM de-energize on all freezers. DrH, PH, and MH
de-energize on RFH1-SSB(-HS)(-HSE).
a)
Comp Diagnosis:
If Comp does not de-energize, check for 115VAC at CB
K1 connector pin #10 (GY wire) to a neutral (W wire). If 115VAC is present, and
cabinet temperature has been met by 3°F (1.7°C) or more, replace CB. If 115VAC is
not present, check continuity of Comp relay contacts. If closed, replace Comp relay.
b1)
ConFM Diagnosis:
Freezer (auxiliary code P-5 and earlier):
If ConFM does not
de-energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral
(W wire). If 115VAC is present, replace CB.
b2)
ConFM Diagnosis:
RFH1-SSB(-HS)(-HSE) Freezer:
If ConFM does not
de-energize, check for 115VAC at CB K1 connector pin #10 (GY wire) to a neutral
(W wire). If 115VAC is present, and cabinet temperature has been met by 3°F (1.7°C)
or more, replace CB. If 115VAC is not present, check continuity of Comp relay
contacts. If closed, replace Comp relay.
c)
EvapFM Diagnosis:
If EvapFM does not de-energize, check for 115VAC at
CB K1 connector pin #3 (DBU wire) to a neutral (W wire). If 115VAC is present,
replace CB.
d)
DrH, PH, and MH Diagnosis: RFH1-SSB(-HS)(-HSE) Freezer:
If heaters do not
de-energize, check for 115VAC at CB K9 connector pin #2 (BR wire) to a neutral
(W wire). If 115VAC is present, replace CB.
10)
Defrost–Freezer (auxiliary code P-5 and earlier) and RFH1-SSB(-HS)(-HSE) Freezer
A.
Defrost Initiation
1a)
Freezer (auxiliary code P-5 and earlier)–LEDs 1 (DH) and 3 (EvapFM off) are
on:
DT terminates or manual defrost initiated. 20-minute minimum defrost timer
starts. 1-hour maximum defrost timer starts. DH energizes.
"dEF" displayed on DB.
If energized, Comp, ConFM, EvapFM de-energize.
1b)
RFH1-SSB(-HS)(-HSE) Freezer–LEDs 1 (DH) and 3 (EvapFM off) are on:
DT terminates or manual defrost initiated. 20-minute minimum defrost timer
starts. 1-hour maximum defrost timer starts. DH energizes.
"dEF" displayed on
DB. If energized, Comp, ConFM, and EvapFM de-energize. DrH, PH, and MH
de-energize.
The time-initiated defrost is factory set to 6 times per day (every 4 hours. For
further details, see "II.E.1.b) Defrost Frequency." Before changing this setting,
contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations.