13
▲
Heating system faults
○
How to diagnose faults:
If the temperature of refrigeration compartment is (-2
℃
) lower than setting temperature for an empty unit (assuming
ambient temp of over 0 degrees centigrade and continuous operation and normal temperature of the freezing compartment),
check the heater fan and PTC heater. If both are working normally, there is probably a heating system fault.
○
How to repair the fault:
1. How to check the heater fan.
If the temperature of refrigeration compartment is lower than set temperature but heater fan does not function, after
verifying no bad connections replace the fan unit
.
(Fig.22& Fig.22.1)
2. How to check the PTC heater
Check the resistance at both sides of PTC heater using a Multi meter; the reading should be approx 1.5 K
Ω
(assuming
normal temperature), if open circuits Replace the PTC heater having once verified the connections to the PTC heater.
Remove the fixing screws of heater
(3,4,5,6) , replace new one.See
(Fig.19).
3. If no fault in the fan or PTC heater, replace the control panel, see
(Page 20-23).
▲
High noise of wine cellar
○
compressor noise
1. The working of motor and piston motion will cause noise when compressor working. So if noise is
steady and not exceeds 42 dB, it
’
s normal. If noise is not steady or very high, it
’
s compressor fault and it
should be repaired or replaced.
2. If compressor
’
s shock absorption rubber is hardening or damaged, or fixing screw of compressor is too
tight or loose, it will cause noise. The settlement is to change new shock absorption rubber or adjust fixing
screws.
○
fan noise
1. When the fans are running , the vanes are circumrotating rapidly and the air flows, which will cause
steady and standard noise. The noise should not exceed 32dB and it is normal.
2. If the noise is extremely high and abnormal, the cause maybe as below
a. The axis of the fan is broken
b. The fan is broken and lost balance
3
>.
How to replace the fans
The fan ruined and we could replace it with the same model
’
s fan
a.. How to replace with the evaporator fan and heater fan
1). Remove the shelves. See
(Fig.1
、
Fig.1.1
、
Fig.2
、
Fig.3
、
Fig.3.1
、
Fig.4)
2). Remove the electric box. See
(Page6)
3). Remove the air duct board. See
(Fig.17 &Fig.18)
4). Remove screws (1,2,3,4), then replace the evaporator fan. See
(Fig.22)
Remove screws (5, 6, 7, 8), then replace the heater fan. See
(Fig.22& Fig.22.1)
