21 Changi South Street 1 Singapore 486777 Phone: +65 65420833 Fax: +65 65426920
E-mail: [email protected] Website:
www.escoglobal.com/ductless
SERVICE SECTION
CHAPTER 3 - TROUBLESHOOTING
CHAPTER 3
TROUBLESHOOTING
This section helps you troubleshoot some of the common problems you might face while operating this
cabinet. Should you have any queries left unanswered here, please feel free to contact Esco.
3.1 ELECTRICAL AND MECHANICAL TROUBLESHOOTING
3.1.1 SPD-3/4AX
Problem
Possible
causes
Corrective Action
Power failure
Check if there is power at the wall socket. If circuit breaker has tripped, please check
electrical components and connections before resetting the breaker.
Check whether electrical cord has been connected properly to the building socket and
to the cabinet.
In electrical panel, measure AC voltage between LIVE and NEUTRAL terminal block.
The voltage should be around either 230Vac or /- 10%. If the voltage is
much lower or near zero, check cable connection at connector A pin 1,2, and 3.
Check if the SMPS (switching mode power supply, model HK-E518-A075/120) output
is 7.5VDC at its output terminal. SMPS is located on the electrical panel and covered
by a stainless steel box. The way of measurement is to disconnect the 5-pin
connector attached to the SMPS, then measure the DC voltage between Red (pin 1)
and Black (pin 4) color cables on the SMPS side (to conduct this measurement,
cabinet needs to be ON). If no voltage, please check the incoming power supply to
the SMPS. If the output voltage of SMPS is less than 7VDC, replace the SMPS.
Check whether there is 7.5VDC supply to the main board. Main board is located on
the electrical panel. Using multimeter, measure DC voltage at J13 terminal on the
main board (Please take note of the polarity, terminal nearer to the edge of the board
is the negative terminal). If no voltage or much lower than 7.5VDC, check connection
between SMPS and main board.
Cabinet does
not start
Wrong
electrical
connection
Check whether there is 7.5VDC supply to the relay board. Relay board is located on
the electrical panel. Using multimeter, measure DC voltage at J1 terminal on the relay
board (Please take note of the polarity, terminal nearer to the edge is the negative
terminal). If no voltage or much lower than 7.5VDC, check connection between SMPS
and relay board.
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Summary of Contents for ASCENT OPTI BASIC
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