Power On; Search And Lock Outdoor \ Indoor Unit; Trial Operation And Parameters Record - Haier MRV5-H Service Manual

6.1.4 Power on

1. For the protection of the compressor, It is required to preheat the compressor oil 6 hours before unit start up. Six
hours of preheating is the standard time for preheating. Commissioning technicians must wait for 6 hours until the
compressor oil reaches the required temp. The main PCB will show on the LED time counting down.
2. The outdoor and indoor units communication P, Q should be disconnected before turning on indoor units in case
of premature start up.

6.1.5 Search and Lock Outdoor \ Indoor Unit

1. Search: Set BM1-1 at off to search outdoor unit, set BM1-2 at off to search indoor unit.
2. Lock: When ensuring that the displayed indoor units, valve boxes and outdoor units quantity is equal to that of
actually installed, the indoor, valve box and outdoor units quantity can be locked. The locking method is to set the
master module dip switch BM1-1 and BM1-2 from OFF to ON.

6.1.6 Trial Operation and Parameters Record

1. The oil temperature startup requirement is 60º Fahrenheit, high speed fan in cooling mode and 86º degree
Fahrenheit, high speed fan in heating mode. The following is the example when using wired controllers for temp.
display.
2. In cooling or in heating mode, let the outdoor and indoor units run for 1 hour;
3. Record for the first time after the unit running for 1 hour, and then record every half an hour for 5 times.
4. Running Parameters Checking Standard.
Mode TA
18~27
Cooling 28~35
above 35
below -5
Heating -5~7
above 7
Pd(psi) Ps(MPa)
217~348 0.4~0.85 closed to Td
246~464 0.5~0.9 closed to Td
290~420 0.7~1.05 closed to Td
232~406 0.1~0.4 closed to Td
275~406 0.3~0.8 closed to Td
319~522 0.8~1.05 closed to Td
Toil Td(°F)
140~230 -68~86°F
140~230 -68~86°F
140~230 -68~86°F
140~230 -68~86°F
140~230 -68~86°F
140~230 -68~86°F
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Outdoor
Ts Indoor EEV
EEV
250 60~480
250 60~480
250 60~480
60-350 200~480
60-350 200~480
60-350 200~480