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7) High current protection in 3-phase fixed frequency models
Is three-phase circuit not
balanced? Is supply voltage too
low? Is supply voltage too low at
compressor start-up?
yes
no
re-wiring
yes
Is compressor current more than overcurrent
protection limit? Is current detecting circuit in
good condition?
Confirm detecting circuit
is abnormal,replace
outdoor PCB
no
yes
yes
replace AC contactor
yes
if compressor is normal
no
Is resistance of compressor
winding incorrect? Is it stuck?
yes
replace compressor
yes
if pressure is normal
no
Check: 1. Is a valve in system shut off;
2. Is piping clogged;
3. Is system overfed; is there air in system;
4. (Cooling cycle) Is condenser dirty? Does outdoor fan motor run at low speed or stop?
5. (Heating cycle) Is evaporator or filter dirty? Does indoor fan motor run at low speed or stop?
6. Is ambient temperature too high? Is system overloaded?
Is power cable or compressor wire
securely connected? Properly?
Modify power supply circuit
yes
Is AC contactor in
poor contact?
Short connect that
terminal
if failure disappear after
PCB is changed
yes
no
replace PCB
yes
Solve problem
accordingly
yes
Is an external alarm
connected to the system?
8
) External alarm
no
Is ALARM terminal in
mainboard disconnected?
An external alarm is
identified according to the
list of fault codes
-307-
Содержание AB092ACBHA
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Страница 236: ... a__WcU S c a V e a Wc N2 4 C N344 C J Taeea_ d VW bc eWV V SYcS_ 236 ...
Страница 238: ... N364 A D N3 4 A E J eab d VW bc eWV V SYcS_ a__WcU S c a V e a Wc 238 ...
Страница 239: ... N364 A D N3 4 A E J Taeea_ d VW bc eWV V SYcS_ a__WcU S c a V e a Wc 239 ...
Страница 241: ... N464 C D J eab d VW bc eWV V SYcS_ a__WcU S c a V e a Wc 241 ...
Страница 242: ... N464 C D J Taeea_ d VW bc eWV V SYcS_ a__WcU S c a V e a Wc 242 ...
Страница 244: ... N364 A N3 4 A J eab d VW bc eWV V SYcS_ a__WcU S c a V e a Wc 244 ...
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Страница 247: ... a__WcU S c a V e a Wc AU242AHBEA AU282AHBEA PCB top side printed diagram 247 ...
Страница 248: ... a__WcU S c a V e a Wc AU242AHBEA AU282AHBEA PCB bottom side printed diagram 248 ...
Страница 250: ... a__WcU S c a V e a Wc AU28NAHBEA AU36NAIBEA AU42NAIBEA PCB top side printed diagram 250 ...
Страница 251: ... a__WcU S c a V e a Wc AU28NAHBEA AU36NAIBEA AU42NAIBEA PCB bottom side printed diagram 251 ...
Страница 253: ... a__WcU S c a V e a Wc AU52NAIBEA PCB top side printed diagram 253 ...
Страница 254: ... a__WcU S c a V e a Wc AU52NAIBEA PCB bottom side printed diagram 254 ...
Страница 256: ... a__WcU S c a V e a Wc AU88NATBEA PCB top side printed diagram 256 ...
Страница 257: ... a__WcU S c a V e a Wc AU88NATBEA PCB bottom side printed diagram 257 ...
Страница 272: ... a__WcU S c a V e a Wc Indoor units except for AP18 AP88 PCB printed diagram 272 ...
Страница 278: ... a__WcU S c a V e a Wc Cabinet indoor units PCB circuit diagram 278 ...
Страница 279: ... a__WcU S c a V e a Wc Cabinet indoor units PCB printed diagram 279 ...
Страница 343: ... a__WcU S c a V e a Wc 14 Air volume and external static pressure curves 343 ...
Страница 349: ...1 8 0 2 4 25 27 22 5 5 heating air discharge angle 45 Temperature distribution a__WcU S c a V e a Wc 349 ...
Страница 357: ...1 8 0 2 4 25 27 22 5 5 heating air discharge angle 45 Temperature distribution a__WcU S c a V e a Wc 357 ...
Страница 364: ...MEMO Commercial Air Conditioner ...