MicroLinks Tech H-CAM Instrukcje Operacyjne Pobierz pdf (Strona 128)

TM 11574A-OI

3-34

Controller Troubleshooting. A group of test points (TP) (Figure 3-15) are provided on

the controller for troubleshooting electrical circuits (schematic diagram, Appendix A).

A description of the test points follows:

NOTE

Use a digital voltmeter to measure AC voltage between TPs and ground (TP9), except for

TP8.

1 TP2 This test point enables the user to check if the internal protector for the

compressor motor (IP-CP) or high pressure switch is open.

TP3 This test point enables the user to check if the water pressure switch (WP)

contact is open or closed.

TP 4 This test point enables the user to check if the internal protector for the

condenser fan motor (IP-CM) is open or closed.

TP 5 This test point enables the user to check if the internal protectors for the

evaporator fan motors (IP-EM1 or IP-EM2) are open or closed.

TP 6 This test point enables the user to check if the controller water tank heater

relay (TQ) is open or closed.

TP 7 This test point is not used in this application.

TP 8 This test point is not applicable to the units covered herein.

TP 9 This test point is the chassis (unit frame) ground connection.

TP 10 This test point enables the user to check if the heat termination thermostat

(HTT) contact is open or closed. 4.3.20.3 Controller Programming Procedure

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 227 228

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MicroLinks Tech H-CAM Instrukcje Operacyjne Strona 128