INSTALLATION
42
HYDRONIC UNIT B
42
Alarm Inverter
Alarm [P350] - [P354] or [P360]
- [P364]
Description
Unit status
Reset type
Verifications
Automatic
Feeding cycle
Comment
134
71
Suction pressure too low
Stop cpr
X
This error becomes permanent after 8 attempts
to complete the operation.
1. Check the external PMV for clogging.
2.Check the coil of the 2-way valve.
3. Check the Ps sensor error(LP).
4. Check the refrigerant filter for clogging.
5. Check the refrigerant pipe for clogging.
6. Check the fan operation. (Heating mode)
7. Check for coolant decrease.
-
72
System high pressure error (pressure switch, compressor casing temperature, power supply)
Stop
X
This error becomes permanent after 10
attempts to complete the operation.
1. Check the temperature sensor (TL).
2. Check fan
3. Check the PMV (pulse motor valve).
4. Check external air exchanger clogging and
air recirculation
5. Refrigerant overload
-
73
Current detection circuit malfunction
Stop cpr
X
This error becomes permanent after 8 attempts
to complete the operation.
Error detected in the following conditions: 1) Compressor current probe malfunction
227
74
Discharge temperature too high
Stop cpr
X
This error becomes permanent after 4 attempts
to complete the operation.
1. Check the refrigeration cycle (gas leak)
2. Electronic expansion valve problems
3. Check the discharge temperature sensor
(TD).
229
75
Phase missing in the power cable
Stop cpr
X
This error becomes permanent after 8 attempts
to complete the operation.
1.Check the supply voltage.
231
76
Inverter heatsink temperature too high
Stop cpr
X
This error becomes permanent after 4 attempts
to complete the operation.
1. Check the explosion path of the heatsink.
-
78
Other Inverter errors
Continue
X
-
79
Unknown errors Inverter
Continue
X
-
80
RTC fault on NHC board
Continue
X
-
81
EEPROM damaged on board NHC
Continue
X
127
82
EEPROM inverter not readable or EEPROM
number out of range
Stop
X
Simple delay in communication.
-
90
Invalid configuration
Stop
X
-
100
Invalid configuration
Stop
X
Automatic when[P055] is reset.
-
200
External alarm
Continue
X
When the contact is closed
