Cub Cadet 8454 - Manual (Page 332)

CHAPTER 9 8454
9-18 D569-W02 May-2003
569W923A
569W924A
569W925A
4. Poor extension valve
Status: Not cool
Phenomena:
- The pressure of high /low pressure side is high.
Cause: Poor extension valve, poor control of refrig-
erant flow rate by poor assembling of the wound
box.
Action: Check the assembly status, location and in-
sulation status of the wound box. With no failure,
replace the extension valve.
b. Not Cool (some times cool)
1. Poor compression of the compressor
Status: Not cool
Phenomena:
- The pressure of low pressure side is high and
the pressure of high pressure side is very low.
- When stopping the operation, the pressure of
h i g h / l o w p r e s s u r e s h a l l b e t h e s a m e
immediately.
Cause: Poor gasket of compressor, poor compres-
sor caused by the broken suction valve.
Action: Disassemble and repair the compressor.
2. Moisture mixing
Status: Sometimes cold, sometimes not cold
Phenomena:
- The pressure of low pressure side is sometimes
negative or sometimes returning normal.
Cause: The moisture inside refrigerating cycle is
frozen which makes the cycle closed in the exten-
sion valve and return to the normal by melting of
ice.
Action: Replace the receiver drier.
Repeat the vacuum working 2 ~ 3 times. Charge
the proper amount of refrigerant.
2.3 kgf/cm 2
32.7 psi
19 ~ 20 kgf/cm 2
270.2 ~ 284.5 psi
Low poor extension
valve
High poor extension
valve
4 ~ 6 kgf/cm 2
56.9 ~ 85.3 psi
7 ~ 10 kgf/cm 2
99.6 ~ 142.2 psi
Low poor compression
of the compressor
High poor compres-
sion of the compressor
- ~ 1.5 kgf/cm 2
- ~ 21.3 psi
6 ~ 16 kgf/cm 2
85.3 ~ 227.6 psi
Low moisture mixing in
the refrigerating cycle
High moisture mixing
in the refrigerating cycle