Hoshizaki RF28A, Руководство по обслуживанию

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B. Diagnostic Chart
Problem Possible Cause Remedy
[1] Compressor will
not start—no
current draw.
a) Power Supply 1. "OFF" position. 1. Move to "ON" position.
2. Loose connection(s). 2. Tighten or reconnect.
3. Failure.
3. Call electrician.
b) Cord and Plug 1. Defective. 1. Replace.
c) Circuit Breaker
(kitchen)
1. Tripped. 1. Check and reset. Call
electrician if breaker trips
repeatedly.
2. Defective. 2. Call electrician.
d) Transformer 1. Open coil winding. 1. Check continuity and
replace.
e) Wiring to Control Board 1. Loose connection(s). 1. Tighten.
2. Faulty. 2. Check continuity and
replace.
f) Voltage 1. Too low. 1. Call electrician.
2. Too high. 2. Call electrician.
g) High Pressure Switch 1. Bad contacts. 1. Check continuity and
replace.
2. Has operated 5 or
more times in one
hour. (E4 should be
displayed)
2. Determine why pressure
switch is activated. See
"2. d) High Pressure
Alarm (E4)."
h) Thermistor 1. Defective. 1. Check and replace.
i) Control Board 1. Defective. 1. Replace control board.
j) Compressor Overload 1. Defective. (Contacts
open)
1. Replace.
k) Compressor 1. Open windings. 1. Check continuity and
replace.
l) Relay (Condensing
Unit)
1. Bad contacts. 1. Replace.
2. Open coil winding. 2. Check and replace.
[2] Compressor will
not run—draws
current and trips
on overload.
a) Voltage 1. Too low. 1. Call electrician.
b) Start Relay 1. Bad contacts. 1. Replace.
2. Open coil windings. 2. Replace.
c) Compressor 1. Locked rotor. 1. Replace.
d) Start Capacitor 1. Defective. 1. Check and replace.
[3] Compressor runs
intermittently and
trips on overload.
a) Voltage 1. Too low. 1. Call electrician.
2. Too high. 2. Call electrician.
b) Condenser Filter 1. Clogged. 1. Clean filter.
c) Refrigerant Line or
Component
1. Plugged or restricted. 1. Clean and replace drier.
Clean and replace
capillary tube heat
exchanger assembly.