Fault Finding; Compressor Won't Start; Compressor Starts, Runs And Then Stops; Compressor Humming - Fisher & Paykel E169T Service Manual

6

FAULT FINDING

The following faults and probable cause/s have been listed with the assumption that
all basic checks have been carried out. Example, product has power, door is closing
correctly etc.
6.1

Compressor Won't Start

• Check continuity of overload. If no continuity replace overload.
• Check Start and Run Winding (as per specifications).
• Check Run Capacitor.
(Manual Compressor Starting Device can be used to confirm diagnostics.)
6.2

Compressor Starts, Runs And Then Stops

• Check connections at the fusite plug, overload and control module connections.
• Check supply voltage.
(Manual Compressor Starting Device can be used to confirm diagnostics.)
6.3

Compressor Humming

• Check continuity of overload. If no continuity replace overload.
• Check connections at the fusite plug, overload and control module connections.
• Check Start and Run Winding (as per specifications).
• Check Run Capacitor.
6.4

PC Too Cold

• Check resistance of variable resistor.
• Check resistance of PC sensor as per table.
• Check cooling plate for frost pattern. Full frost pattern is required. If not a full
frost pattern, check product for shortage of refrigerant or inefficient compressor.
• Check temperatures of cooling plate both intake and exit of plate. If temperature
of intake differs from exit temperature, further investigation is required.
6.5

PC Warm

• Check setting of control knob.
• Check resistance of variable resistor.
• Check resistance of PC sensor as per table.
• Check if cooling plate has normal frost pattern. If not, further investigation is
required.
6.6

FC Too Cold

• Check setting of control.
• Check if PC sensor is in correct position.
• Check resistance of PC sensor as per table.
• Check if FC Evaporator has normal frost pattern. Checking temperature of the FC
evaporator and cooling plate is recommended to rule out or confirm system or
compressor fault/s.
13