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10

ELECTRICAL CONNECTIONS 

 
The controller is provided with screw terminal block to connect cables with a cross section up to 2,5 mm

2

. Before 

connecting cables make sure the power supply complies with the control’s requirements. Separate the probe cables 
from the power supply cables, from the outputs and the power connections. Do not exceed the maximum current 
allowed on each relay, in case of heavier loads use a suitable external relay. 

 
PROBE CONNECTIONS  

 
The probes shall be mounted with the bulb upwards to prevent damage due to casual liquid infiltration. It is 
recommended to place the thermostat probe away from air streams to correctly measure the average room 
temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where most ice is 
formed, far from heaters or from the warmest place during defrost, to prevent premature defrost termination. 
 

SERVICE INSTRUCTIONS 

 

1.  High head pressure and high back pressure: 

A.  Condenser coil clogged or restricted 
B.  Condenser fan motor defective. 
C.  Air discharge in rear of cabinet restricted. 

2.  Low back pressure and low head pressure:                                       

A.  Restriction in system. 
B. Refrigerant 

undercharged. 

C.  Leak in system 

3.  Pressure normal – cabinet warm: 

A.  Coil blocked with frost (see #4). 
B. Refrigerant 

undercharged. 

C.  Control set too warm. 

4.  Ice merchandiser not cycling – coil blocked with frost: 

A.  Defective temperature controller, or improper settings. 
B. Refrigerant 

overcharged. 

C.  Location too hot. 
D. Condenser 

clogged. 

E.  Condenser fan motor defective. 
F.  For freezer, defrost heater not operating. 
G.  Air leakage into ice merchandiser due to open door or faulty door seal. 

5.  Compressor starts and runs – but cycles on overload: 

A. Low 

voltage 

B. Relay 

defective. 

C. Overload 

defective. 

D.  High head pressure (see #1). 
 

 
 
 
 
 
 
 
 
 
 

Summary of Contents for IM-23GB

Page 1: ...IM 23GB Installation Operations Manual With TLY 25 Controller Master Bilt Products 908 Highway 15 North New Albany MS 38652 Phone 800 684 8988 LN_ 09 26 06...

Page 2: ...2...

Page 3: ...IC REFRIGERATION CONTROL TLY 25 6 OPERATION 8 MANUAL DEFROSTS 8 HOW TO CHANGE SETPOINTS 8 LIST OF PARAMETERS 9 ALARM OTHER SIGNALS 9 ELECTRICAL CONNECTIONS 10 PROBE CONNECTIONS 10 SERVICE INSTRUCTIONS...

Page 4: ...This symbol is the safety alert symbol When you see this symbol on your ice merchandiser or in this manual be alert to the potential for personal injury or damage to your equipment Be sure you underst...

Page 5: ...8 Fax 800 684 8988 GENERAL INSTRUCTIONS 1 Be sure the ice merchandiser is properly installed by competent service people 2 Keep the ice merchandiser clean and sanitary so it will meet your local sanit...

Page 6: ...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 digi...

Page 7: ...be programmed via the parameter USrb to carry out other functions just like the key DOWN AUX see par 4 12 5 Led OUT Indicates the compressor output status or the temperature control device on on off...

Page 8: ...of those four times MANUAL DEFROST 1 Push this DEFROST UP DEFROST key for more than 5 seconds and a manual defrost will start if the conditions are correct the led DEF will light up and the instrument...

Page 9: ...time OFF 99 59 min sec 2 00 dLo Defrost display On OFF Lb lb FLt High temperature fan off 58 302 C F 45 PtC Compressor protection time OFF 99 59 min sec 1 00 od Delay at power on OFF 99 59 min sec 0...

Page 10: ...e is formed far from heaters or from the warmest place during defrost to prevent premature defrost termination SERVICE INSTRUCTIONS 1 High head pressure and high back pressure A Condenser coil clogged...

Page 11: ...r error codes Repair or adjust the control Checked expansion valve for Freezers Improper controls adjusted Clean or replace What is Evaporator Superheat Evaporator Superheat too high Adjust expansion...

Page 12: ...to access the condenser coil and compressor housing Care should again be taken not to unnessarily soak fan motors electrical connections time clock ballasts or any wire raceway Check the condenser coi...

Page 13: ...with adapter 11 01410 drain line heater wire 17 00404 heater clip 17 09431 drier 09 09308 grill 256 28900 rear Cover 255 11714 Cap Tube 11 01450 heater safety 19 01164 vinyl tube 11 00876 coil defros...

Page 14: ...stallation Service Manual are included with it If you need replacement labels or manuals Master Bilt will provide them free Contact the customer service department at Master Bilt at 800 647 1284 The c...

Page 15: ...15...

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