Diagnostic Table - Hoshizaki Steelheart Series Service Manual

D. Diagnostic Table
Check for correct appliance installation per the instruction manual and proper voltage
per appliance nameplate.
1a. Appliance Not Cooling - Rail Area
Appliance Not Cooling - Rail Area - Possible Cause
1. Power Supply
2. Power Cord and Plug
3. Wiring
4. Rail Control Module
5. Rail Control Dial
6. Rail Thermistor
See "II.C. Thermistor Check"
7 Rail Light Sensor
8. Compressor External Protector
9. Compressor
10. Condenser Fan Motor
11. Condenser
12. Evaporator Fan Motor
13. Evaporator
14. Refrigerant/Refrigerant Lines
15. Rail Air Duct Panel
16. Pans and Rail Dividers
17. Defrost Heater
a) Unplugged, blown fuse, or tripped or defective circuit breaker.
b) Loose connection.
c) Not within specifications.
a) Loose connection.
b) Defective.
a) Loose connection or open.
b) Faulty.
a) In alarm (LED flashing red).
b) In defrost.
c) Defective.
a) Set too warm.
b) Defective.
a) Loose, disconnected, or out of position.
b) Defective.
a) Defective. Stuck in night mode while rail lids open (Day mode).
See "II.B.6. RLSen Diagnosis."
a) Dirty condenser.
b) Condenser fan motor not operating.
c) Defective.
d) PTC relay defective.
e) Low charge.
f) Run capacitor (if applicable) defective.
a) Defective.
a) Fan blade binding.
b) Defective.
a) Dirty.
a) Defective.
b) Fan Blade Binding.
a) Dirty or frozen up. See "II.D.2. Evaporator is Frozen Up."
a) Gas leak.
a) Refrigerant lines or components restricted.
a) Misaligned or missing.
a) Misaligned with gaps in the rail area.
a) Rail Control Module defective.
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