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c) Defrost Termination:
Comp icon is on. EvapFM icon flashing.
30-min. DT
terminates. 6-hr. DT starts. Comp icon turns on and Comp energizes. 2-min. EvapFM
timer starts. EvapFM icon starts flashing and EvapFM de-energizes. When 2-min.
EvapFM timer terminates, EvapFM icon turns steady and EvapFM energizes. Normal
operation resumes.
Diagnosis:
Has appliance been in defrost for 30 min.? If not,
allow 30-min. DT to terminate. Confirm CTh is 4°F above setpoint. After 30-min.
DT terminates, does Comp icon turn on and Comp energize? If not, replace CB. If
30-min. DT terminates and Comp icon turns on but Comp does not energize, check
CB Comp connector for 115VAC. If 115VAC is not present, replace CB. If 115VAC is
present, and Comp is off, check Comp wire harness connections, Comp external
protector (integrated with start relay), Comp start components, and Comp motor
winding continuity.
12)
Energy Saving Mode
ESM initiates during periods of inactivity. Once CTh cools to setpoint, 20-min. ESM
timer starts. DS must remain engaged without activation (door open) for 20 min. after
CTh has achieved setpoint for ESM to initiate. Once 20-min. ESM timer terminates,
EvapFM operates on ESM cycle.
Diagnosis:
Confirm 20-min. ESM timer terminates. Check that EvapFM cycles off with
Comp and operates 1 min. on and 5 min. off when Comp is de-energized. If not, replace
CB.
Legend:
CB
–control board;
Comp
–compressor;
CT
–cabinet temperature;
DM
–display
module;
DS
–door switch;
DT
–defrost timer;
ESM
–energy saving mode;
EvapFM
–evaporator fan motor
Summary of Contents for HR24A
Page 25: ...25 B Wiring Diagram 1 HR24A ...
