Engel MT45F-U1D-P - Trouble Flowchart; Does Not Get Cold

※１ Ambient temp 25℃
※２ Ambient temp 25℃～-16℃
5. TROUBLE SHOOTING
10
Is the output voltage from the power
supply to the compressor normal?
Approx. AC13V - 18V ※１
■ Does not get Cold
(Temperature setting -18℃
)
Is compressor
running?
Lower than AC１３Ｖ
Checking
Is the special
fuse of the DC
cord or the
blade fuse of
the power
supply blown?
Are wirings and couplers
connected?
Replace the
power supply.
Replace the fuse
See page 13
【Check 1】
See page 13
【Check 2】
Test result
Judge
Fixing
Connected repair.
Replace the
power supply.
See page15
【Check 7】
Power supply is
broken
Normal
Yes
Yes No
Normal
Normal
No
Yes
No
Out of standard
Gas leak, clogging, etc.
Measurement of rated
current of refrigerator or
compressor
Replace the
cooling unit.
See page 15
【Check 7】
Is temperature
controller (digital
display) lit
?
Is the output voltage from the control
assembly to the power supply normal?
Normal
Abnormal
See page 14
【Check 5】
teperature controller
is broken.
Replace the
teperature
controller.
Replace the
power supply.
Lower than AC１３Ｖ
Power supply is
broken
Is the output voltage from the power
supply to the compressor normal?
Approx. AC13V - 18V ※１
See page 13
【Check 2】
Abnormal
Out of standard
Abnormal
Abnormal
Replace the
cooling unit.
Compressor lock etc.
Measurement of rated
current of refrigerator or
compressor
Compressor resistance
About 1.7Ω (at 25 ℃)
※Using analog tester
0Ω
∞Ω
Out of standard
Normal
Coil disconnection
Coil short circuit
Is the output voltage from the power
supply to the control assembly normal?
Out of standard
Power supply is
broken
teperature controller
is broken.
Normal
Replace the
teperature
controller.
See page 14
【Check 6】
Abnormal
Abnormal
Abnormal