Haier MRV II - Page 114

Part 3
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master unit oil temp. too low
20
20
20
20
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20
digital
tube
indication
on master
unit
indication
on wired
controller
(hex)
failure code definition
failure description
master unit low pressure
sensor Ps too low protection
master unit high pressure
sensor Pd too high protection
discharging temp. sensor Td
protection
communication between
master unit main chip 849 and
communication chip 849
failure
50
no communication for 4 minutes
33
34
20
20
EEPROM failure of master unit
main chip 849
master unit discharging temp.
Td protection
EEPROM faulty, or being inserted conversely, with incorrect
part
Td sensor is over 120
℃
for 10 seconds, unit stops and
alarms; 2 minutes and 50 seconds later, resumable. If it
occurs 3 times in an hour, confirm the alarm.
compressor is running, Toil < PS+10 for 4 minutes or Toil
<Ps+3 for 10 seconds, the unit stops and alarms; if it occurs
3 times in an hour, confirm the alarm. The failure resume
condition:
1. When Ta<=0
℃
, Toil>=Ps+10 and Toil >=6;
2.When Ta>0℃, Toil>=Ps+10 or Toil >=36
master unit high pressure
sensor Pd too low protection
compressor is running, detecting Pd sensor is below 17.
8kg/cm
2
, and compression ratio is below 2 for 5 minutes,
the unit stops and alarms. Not detect in the course of
defrosting, within 3 minutes after defrosting, oil return, within
5 minutes after oil return.
compressor is running, detecting Ps sensor is below 0.
5kg/cm
2
for 10 seconds; in oil return, detecting Ps sensor
is below 0.3kg/cm
2
for 10 seconds, the unit stops and alarms.
2 minutes and 50 seconds later after unit stops, resume.
compressor is running, detecting Pd sensor is over
40kg/cm
2
for 10 seconds; the unit stops and alarms. 2 minutes
and 50 seconds later after unit stops, resume.If it occurs
3 times in an hour, confirm the alarm
compressor is running, Td<Pd+5 for 1 minute, the unit stops
and alarms. 2 minutes and 50 seconds later after unit stops,
resume.If it occurs 3 times in an hour, confirm the alarm.In
defrosting and within 3 minutes after defrosting, not alarm.
20
communication between
connecting board and module
board failure
no communication for 4 minutes
47 20
radiator failure
radiator temp. is over 95degree, the unit alarms. 2 minutes
and 50 seconds later after unit stops, resume.
48
20
ACCT over current protection
(instant value)
ACCT sensor detects that he instant current peak value
between U and V is over 94A, 2 minutes and 50 seconds
later after the unit stops, resume.
49
20
ACCT over current protection
(virtual value)
ACCT sensor detects that he instant current peak value
between U and V is over 34Arms, 2 minutes and 50 seconds
later after the unit stops, resume.
20
over voltage
VDC is over 817V, 2 minutes and 50 seconds later after
the unit stops, resume.
51
20
current detecting failure
after compressor has run for 10 seconds, current among
U, V, W is below 1.5Arms, 2 minutes and 50 seconds later
after the unit stops, resume.