York YUFE60BYSM-MS-1 - High Temperature or Protection of Pressure Diagnosis and Solution

Troubleshooting
 Page 101 
5.11 High temperature or protection of pressure diagnosis and solution
Description: The High pressure switch detects a ultra high pressure or the Low pressure switch detects a ultra low
switch, which could damage the system.
Recommended parts to prepare:
• Bad wiring of the pressure switches
• Faulty pressure switches
• Refrigeration system is over load or blocked or lack of refrigerant
Troubleshooting and repair:
High tem perature or protection
o f p re ssu re
High tem perature or protection
o f p re ssu re
Is te m p e ra tu re
p ro te ctiv e sw itc h K 1
open
Is te m p e ra tu re
p ro te ctiv e sw itc h K 1
open
Is it k 1 o r K 2 open ?
Is it k 1 o r K 2 open ?
Possible reason
1.T h e w ire s is lo o se to K 1
2.A ir o r o th e r g a s in th e re frig e ra n t.
3.H eat exchanger is dirty
4.O utdoor fan or fan blade is defective
5.O utdoor unit is in bad ventilation
6.Refrigerant is leakage
Possible reason
1.T h e w ire s is lo o se to K 1
2.A ir o r o th e r g a s in th e re frig e ra n t.
3.H eat exchanger is dirty
4.O utdoor fan or fan blade is defective
5.O utdoor unit is in bad ventilation
6.Refrigerant is leakage
YES
Is p re ssu re p ro te ctiv e
s w it c h K 2 open
Is p re ssu re p ro te ctiv e
s w it c h K 2 open
Possible reason
1.T h e w ire s is lo o se to K 2
2.A ir o r o th e r g a s in th e re frig e ra n t.
3.H eat exchanger is dirty
4.O utdoor m otor or fan blade is d e fe c tive
5.O utdoor unit is in bad ventilation
6.Refrigerant is too m uch
Possible reason
1.T h e w ire s is lo o se to K 2
2.A ir o r o th e r g a s in th e re frig e ra n t.
3.H eat exchanger is dirty
4.O utdoor m otor or fan blade is d e fe c tive
5.O utdoor unit is in bad ventilation
6.Refrigerant is too m uch
YES