Hoshizaki HFE-127MA-CHD, Service Manual

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[b] HFE SERIES, HRFE SERIES - FREEZER
PROBLEM PROBLEM POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS")
No refrigeration Compressor will not start No temp indication [1] Safety Breaker OFF
[2] Controller Open circuit, connector unplugged
No error indication [4] Interior Thermistor Abnormal resistance, bad contact
[6] Pressure Switch Defective
[3] Relay Output
[7] Compressor Winding open, electrical part defective
Compressor starts and stops No error indication Ambient temp too high
immediately Condensing capacity insufficient Heat source, ventilation
[14] Air Filter Clogged
[8] Condenser Fan Motor Locked, open circuit
[3] Relay Output
[6] Pressure Switch Defective
[4] Interior Thermistor Location
[7] Compressor Locked, etc
Compressor runs with LLL, HHH error indication [5] Defrost Thermistor Open circuit, short circuit
no refrigeration (Down Key pressed)
See II. 5. [b] and III. 1.
[11] Thermal Fuse Blown out
LLL, HHH error indication [4] Interior Thermistor Open circuit, short circuit
(No button operation)
See III. 1.
Refrigeration Indicator [2] Controller Hold down Up Key for 3 seconds to cancel
Light flashes quickly every forced refrigeration. After cancellation,
0.5 second (No button defrost cycle starts automatically.
operation) See II. 5. [b].
No error indication Ambient temp too high
Condensing capacity insufficient
Heat source, ventilation
[14] Air Filter Clogged
Internal load too large
Door gap
[4] Interior Thermistor Location
[9] Interior Fan Motor Open circuit, defective
[2] Controller Defective
[12] Refrigeration Circuit Capillary, drier
[13] Refrigerant Leak
[8] Condenser Fan Motor Locked, open circuit
[7] Compressor Defective
[10] Defrost Heater Open circuit, defective
Poor refrigeration Slow refrigeration Set point is reached Interior overloaded
Set point is not reached See "Compressor runs with no refrigeration" above
Normal temp indication Interior overloaded
with poor refrigeration Heat load inside
[9] Interior Fan Motor Open circuit, defective
[2] Controller Defective
[4] Interior Thermistor Abnormal resistance, bad contact, location
Frosted evaporator Defrost cycle setting readjusted Too long
[5] Defrost Thermistor Abnormal resistance
[10] Defrost Heater Open circuit, defective
[11] Thermal Fuse Blown out
High cabinet temperature LLL, HHH error indication [5] Defrost Thermistor Open circuit, short circuit
after defrost (Down Key pressed)
See II. 5. [b] and III. 1.
No error indication [5] Defrost Thermistor Location