Filter
Top Products
14
Table 5 — Subcooling Charging Table
Compressor Lockout Switch — The 38HDR units
are provided with a compressor lockout protective device. If
the compressor shuts down due to any safety device, a current
loop monitoring the compressor current senses no current flow.
The unit will lock out until the control power is interrupted to
reset the lockout. Determine the reason for the safety trip. To
restart, turn the thermostat to the OFF position and then set the
thermostat to an operating position.
MAINTENANCE
Lubrication
COMPRESSOR — Compressor contains factory oil charge;
replace oil when lost. Use Mobile 3MA-POE oil.
Cleaning Coils — Coil should be washed out with water
or blown out with compressor air. Note that the blow-thru
design causes dirt and debris to build up on the inside of the
coils.
Clean coil annually or as required by location and outdoor
air conditions. Inspect coil monthly and clean as required. Fins
are not continuous through coil sections. Dirt and debris may
pass through first section, become trapped between the row of
fins and restrict condenser airflow. Use a flashlight to deter-
mine if dirt or debris has collected between coil sections. Clean
coil as follows:
1. Turn off unit power.
2. Using a garden hose or other suitable equipment, flush
coil from the outside to remove dirt. Be sure to flush all
dirt and debris from drain holes in base of unit. Fan
motors are waterproof.
TROUBLESHOOTING
See Fig. 9 for troubleshooting information.
LIQUID PRESSURE
AT SERVICE VALVE
(psig)
REQUIRED LIQUID LINE
TEMPERATURE (F)
Required Subcooling
Temperature (F)
8 1012141618
189 58 56 54 52 50 48
195 60 58 56 54 52 50
202 62 60 58 56 54 52
208 64 62 60 58 56 54
215 66 64 62 60 58 56
222 68 66 64 62 60 58
229 70 68 66 64 62 60
236 72 70 68 66 64 62
243 74 72 70 68 66 64
251 76 74 72 70 68 66
259 78 76 74 72 70 68
266 80 78 76 74 72 70
274 82 80 78 76 74 72
283 84 82 80 78 76 74
291 86 84 82 80 78 76
299 88 86 84 82 80 78
308 90 88 86 84 82 80
317 92 90 88 86 84 82
326 94 92 90 88 86 84
335 96 94 92 90 88 86
345 98 96 94 92 90 88
354 100 98 96 94 92 90
364 102 100 98 96 94 92
374 104 102 100 98 96 94
384 106 104 102 100 98 96
395 108 106 104 102 100 98
406 110 108 106 104 102 100
416 112 110 108 106 104 102
427 114 112 110 108 106 104
439 116 114 112 110 108 106
450 118 116 114 112 110 108
462 120 118 116 114 112 110
474 122 120 118 116 114 112
486 124 122 120 118 116 114
499 126 124 122 120 118 116
511 128 126 124 122 120 118
Before performing recommended maintenance, be sure
unit main power switch is turned off. Failure to do so may
result in electric shock or injury from rotating fan blade.