ALLIANCE ALLWH200R410, Техническое руководство

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52
4 Fault analysis and solutions
4.1 Abnormal phenomena
Table 3-4.1:
Phenomena Cause
White aerosol or globule is given out. Or make
sound of ‘hiss’ every now and then.
When the unit is defros ti ng, this is the sound of the 4 -way valve being
shi ft ed. Air supply motor stops auto mati cally to defrost.
At the beginning and the end of the defrost process, a sound is emitted
During the process or just aft er having stopped, a sound like water fl ow
occurs, which will be ampli fi ed during the fi rst 2~3 minutes. This is caused
by process of refrigerant current or water discharge during dehumidifying opera ti on.
Slight ‘hiss’ is caused by heat exchanger as temperature changes. This is
caused by normal expansion/contraction sounds due to temperature changes.
During the beginning or just aft er having stopped, a ticking sound occurs ,
which is caused by electric expanding valve opera ti on.
Water outlet temperature fl uctu ati on.
Because of different water inlet pressures, under certain working conditions
th
is may show up as a water outlet temperature fluctuation, which is a normal
phenomenon, and will not affect the actual operation; appropriately adjusting
the water pressure can improve this phenomenon.
Water outlet temperature cannot reach the
se
tti ng temperature.
Under low temperature condi ti ons, for the purpose of protec ti ng the unit, the
water outlet temperature may not reach the higher se tti ng temperature,
which is a normal phenomenon.
The terminal circul ati ng water temperature is
lower than the se tti ng temperature
For purpose of protec ti ng the unit, the terminal circula ti ng water
temperature cannot reach 60ºC, which is a phenomenon, and will not aff ect
the actual operation .
After the unit is stopped, there is a 3 minute
Compressor delay protec ti on. It is a normal phenomenon.
The fan operates at low speed or only
operates one fan
When the ambient temperature is high, for protec ti ng the unit then the fan
will shi ft t o low speed or only operate one fan.
Heat exchanger defros ti ng.
If operated in winter, and if the heat exchanger surface temperature is lower
than the ambient one, and the heat exchanger surface temperature is lower
than 0ºC, the surface will be frosted, which will
aff ect the heat exchanging
e ff ect, so the unit should be periodically defros ti ng.
The fan does not operate. During defros ti ng, the fan will not be operated.
by the motor valve.
delay before operation resumes.
Table 3-4.2: Phenomena need to check again
Phenomena Cause
Operation stops or speeds up automatically
Check whether t he tim e r has been incorrectly set .
Check if anti-f reez in g mod e is in operation .
N o o pera tion
Check w he t her t he p ow e r is cut.
Check w he t her t he manual p ow e r su pp ly switc h is off .
Check w he t her t he fuse is b r ok e n .
Check w he t her t he pr ot e ction de v ic e wo r ks. (Opera tion lam p is lit .)
Check w he t her it is t he tim e setting. (Oper ation lam p is lit .)
MCAC-HTSM-201801 Alliance R410A Direct Heating Type HPWH 50Hz Technical Manual