
9Technical specifications
English
Technical specifications
No/low air flow The air tubing is not connected
properly.
The air tubing is blocked, pinched
or punctured.
The flow generator is not working
correctly.
The cover is not latched correctly.
The cover seal is not fitted
correctly.
Connect the air tubing as described in
“Setting up your H4i for use” on page 1.
Unblock or free the air tubing. Check the air
tubing for punctures.
See the Troubleshooting section in the flow
generator manual.
Make sure the cover is latched onto the
docking station correctly.
Make sure the cover seal is facing the right
way up and fitted securely.
Water splashing on
your face
The water chamber is overfilled.
Condensation is forming in the air
tube and mask.
Empty some water from the water chamber.
Turn the control dial down.
Use the ResMed Tubing Wrap.
Maximum heater plate temperature 185°F (85°C)
Temperature cut-out 199°F (93°C)
Maximum gas temperature 106°F (41°C)
Dimensions (H x W x D) Docking station and water chamber: 5.0” x 6.7” x 8.3” (130 mm x
170 mm x 212 mm)
Weight Docking station and unfilled water chamber: 1.64 lb (744g)
Water capacity To maximum fill line: 390 mL
Power supply Input range for ResMed devices with H4i: 100–240V, 50/60Hz;
110V, 400Hz; 2.5A <140 VA (110 W) (max. power consumption)
Instantaneous peak power consumption <340 VA*
Maximum heater element power: 85 W
* Actual average power consumption will vary depending on factors such as temperature setting, set
pressure, the use of accessories, height above sea level and ambient temperature.
Docking station Flame retardant engineering thermoplastic, plated cast aluminium
Water chamber Injection molded plastic, stainless steel and silicon seal
Operating temperature +41°F to +95°F (+5°C to +35°C)
Operating humidity 10–95% non-condensing
Storage and transport temperature -4°F to +140°F (-20°C to +60°C)
Storage and transport humidity 10–95% non-condensing
IEC 60601-1 classification Class II (double insulation), Type CF
Electromagnetic compatibility Please refer to your flow generator user's manual for details
Problem Possible cause Solution
248671 H4i User Guide AMER Multi.book Page 9 Friday, February 1, 2013 1:23 PM