Heatcraft Refrigeration Products BEACON II H-IM-79E, Installation And Operation Manual

25

Beacon II Troubleshooting Guide (continued)

Diagnostics

  Part Number 

Valve 

100 

BTUH 

100 

BTUH 

100 

BTUH 

100 

BTUH 

  29320003 

ESVB-1 

0.68 

8160 

0.64 

7680 

0.48 

5760 

0.42 

5040 

  29320004 

ESVB-4 

3.27 

39240 

3.07 

36840 

2.31 

27720 

2.05 

24600 

  29320007 - 08  ESVB-10 

8.02 

96240 

7.54 

90480 

5.65 

67800 

5.01 

60120 

  29320013 

ESVB-15 

15.14 

181680 

14.25 

171000 

10.69 

128280 

9.47 

113640 

  29320014 

ESVB-20 

22.18 

266160 

20.87 

250440 

15.65 

187800 

13.86 

166320 

   PROBLEM 

Step  ACTION ITEM 

IF OK 

IF NOT OK

1. 

Check wiring connection to the board 

• Correct field wiring to the board

2. 

Low Pressure Safety (LPS) Tripped:

• Check for correct refrigerant type 

• Change setpoint to match refrigerant

• Check refrigerant charge 

• Add more refrigerant to proper charge

• Check LPS setting 

• Correct LPS setting

• Check LPS wiring 

• Correct LSP wiring

• Check EEV operation (stuck?) 

• Clean or replace EEV

• Check coil for icing 

• Defrost coil (see E6, step 2)

• Check for correct superheat reading 

• Check/replace sensor or transducer

• Check for correct nozzle selection 

• Replace distributor nozzle

• Check for clogged EEV inlet screen 

• Replace EEV

• Check line sizing 

• Correct line sizing

• Check LPS time delay relay setting 

• Reset to 1 minute

• Check operation of LPS 

• Replace Low Pressure Safety Switch

3. 

High Pressure Safety (HPS) Tripped:

• Check for system overcharge 

• Reclaim/recover excess charge

• Check for non-condensables 

• Remove all non-condensables

• Check condenser fan motor and blade 

• Repair or replace motor and/or blade

• Check for dirty condenser coil 

• Clean condenser coil

• Check head pressure controls 

• Adjust or replace faulty controls

• Check fan cycling controls 

• Adjust or replace faulty controls

• Check liquid line sizing 

• Correct line sizing

• Check for liquid line restrictions 

• Repair line or remove restrictions

• Check operation of HPS 

• Replace HPS if necessary

  E7  Compressor 

4. 

Oil Pressure Safety (OPS) Tripped:

        Shutdown 

• Check oil level in compressor 

• Add oil to crankcase to minimum level

• Check oil sump screen pickup 

• Clean or replace pickup screen

• Check oil pump pressure 

• Replace compressor oil pump

• Check for proper piping practices 

Go to 

• Correct piping to minimize oil logging

• Check for low superheat (see E6) 

next step  • Correct per steps in E6

• Check operation of auxiliary relay (R6) 

• Replace auxiliary relay

• Check OPS sensor 

• Replace faulty OPS sensor

• Check operation of OPS 

• Replace faulty OPS

5. 

Compressor Module Tripped (when supplied):

• Check module 

• Replace faulty module

• Check superheat at compressor inlet 

• Reduce superheat (TXV adjust, etc.)

• Check compressor for overheating 

• Correct overheating problem

• Check suction pressure (too low?) 

• Consider crankcase pressure regulator  

   or other measures

6. 

Phase Loss Monitor (PLM) Tripped:

• Check presence of all phase legs 

• Correct power phase problem

• Check power supply 

• Correct power supply problems

• Check operation of PLM 

• Replace faulty PLM

7. 

Demand Cooling (when supplied):

• Check auxiliary relay 

• Replace auxiliary relay

• Check demand cooling device 

• Replace faulty demand cooling device

8. 

Check compressor relay on board 

• Replace board if relay is faulty