Heat Controller MSH-0186/A manual Cycle Troubleshooting Guide, Trouble analysis, Cause of Trouble

"Cycle Troubleshooting Guide

1. Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Temp. difference	:approx. 0°F	All amount of refrigerant leaked
Current	:less than 80% of	out.
	rated current	Check refrigeration cycle.

Temp. Difference

Temp. difference

Current

Operating Current

Temp. difference

Current

:approx. a°C(140F) I		Refrigerant leakage
:less than 80%	of	Clog of refrigeration cycle
rated current		Defective compressor
:less than 80C(1 40F)
-less than 80%	of	Excessive amount of refrigerant
rated current

Temp.difference :over8°C(14°F) Normal

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air

"humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Suction pressure	Temperature	Cause of Trouble
(Compared with the	(Compared with the
normal value)	normal value)
	High	Defective compressor
		Defective 4-way reversing valve
Higher
	Normal	Excessive amount of refrigerant
		Insufficient amount of
Lower	Higher	reidgerant(Leakage)
		Clogging

Description

Current is low.

High pressure does not quickly rise at the beginning of operation.

Current is low.

Current is low.

Notice:

1.The suction pressure is usually 56.8-71.0 PSIG at normal condition.

2.The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty-

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