6
MECHANICAL
Remove front grille and check refrigeration lines to see that they are free (not touching each other or compressor).
Spin condenser fan blade to see that it is free.
The compressor is hermetic so it is internally spring mounted and ready to run.
ELECTRICAL
WARNING
Before servicing electrical components in the case or the doors or door frames make sure all power to case is
off. Always use a qualified technician.
Check voltage and amps drawn on (Page 12-13) to determine proper line and fuse or circuit breaker size. Check power
supply for low voltage. If voltage reads “115” with no load, and it drops below “100” when the compressor tries to start,
it is an indication of too small supply wiring or too long to run.
It is recommended that a separate circuit be run for each ice merchandiser to prevent another appliance from blowing
the fuse or breaker, causing loss of product.
MASTER-BILT ELECTRONIC REFRIGERATION CONTROL (TLY-25)
GENERAL DESCRIPTION
The model TLY-25/29 is a digital controller with microprocessor that is typically used in cooling applications that have
temperature control with ON/OFF regulation and defrosting control with set time and hours intervals (Real Time Clock
Defrosting) by means of electrical.
The instrument has 3 relay outputs, two inputs for PTC or NTC temperature probes and a digital input, that can all be
configured.
The 3 outputs can be used for controlling the compressor or the temperature control device (OUT), the defrosting
device (DEF), the evaporation fan (FAN) or, alternatively any of the previous functions, using an auxiliary device (AUX)
or an alarm (AL).
The two inputs for the PTC and NTC temperature probes (which can be selected by parameter) can be used to
measure the cell temperature (Pr1) and the evaporator temperature (Pr2).
