Motak PKM0335, Руководство по обслуживанию

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104 Part Number: 000016427 Rev 00 08/2020
Specifications
Compressor Drawing Locked Rotor
The two likely causes of this are:
• Defective starting component
• Mechanically seized compressor
To determine which you have:
1. Install high and low side gauge.
2. Try to start the compressor.
3. Watch the pressures closely.
• If the pressures do not move, the compressor is seized. Replace the compressor.
• If the pressures move, the compressor is turning slowly and is not seized. Check the
start components.
Compressor Drawing High Amps
The continuous amperage draw on start-up should not be near the maximum fuse size
indicated on the serial tag.
The wiring must be correctly sized to minimize voltage drop at compressor start-up. The
voltage when the compressor is trying to start must be within ±10% of the nameplate
voltage.
PTCR
The PTCR allows current to flow through the start winding at compressor startup.
Current flow heats the ceramic discs in the PTCR. The electrical resistance increases with
temperature and stops all except a trickle of current flow through the start winding. The
small flow of current keeps the PTCR hot (260°F/127°C) and the start winding out of the
circuit.
The PTCR must be cooled before attempting to start the compressor, otherwise the
PTCR will heat up too quickly and stop current flow through the start winding before the
compressor motor reaches full speed.
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Warning
Disconnect electrical power to the entire ice machine at the building electrical
disconnect box before proceeding.
NOTE: If a PTCR is dropped internal damage can occur to the ceramic PTCR discs. The
ceramic disc can chip and cause arcing which leads to PTCR failure. Since there is no way
to open the PTCR in order to determine if the ceramic disc is chipped or not, it must be
discarded when dropped.