TECHNICAL MANUAL for IBIS ROOFTOP AIRCONDITIONER ERROR CODES & THEIR MEANING Aircommand Australia Pty Ltd 954 Port Road Albert Park South Australia 5014 Email: reception@aircommand.com.
TECHNICAL MANUAL for IBIS ROOFTOP CARAVAN AIRCONDITIONER ERROR CODES & THEIR MEANING: E1: Room sensor fault. Usually a faulty connection (plug), damaged lead or a faulty sensor itself. Action: Check White plug is connected on main board. Check resistance of thermistor & cable by measuring with a multimeter. 10K ohm @25C. See fig 19 and table 1. If open circuit or out of calibration, replace.
Action (continued) If the temp. differential is 14C or more but unit goes out on E4 after approx. 30 minutes, please check the actual thermistor temperature by the following procedure. With the inside fan running on Hi. Press Temp down button followed by the mode button. Hold them both in for approx 5 seconds. The amber Lock LED illuminates. Now press the Temp down button and the Sleep button Together for about 1 second. The green Med speed will be Flashing.
When attempting to diagnose a fault over the phone, please ask the following questions. Also it is usually possible to direct the customer to extract thermistor temp. data as described before. This can make fault finding more accurate.
Typical faults or complaints 1: Any complaint accompanied with an error code, see earlier pages. 2: Unit will not work and no display is evident. Check the following: Main ECB breaker is set to ON Mains power is OK at output from ECB Is the 4 core control cable plugged into the receiver in the inside plenum? Fig 23 Faulty mains connection at the underside of unit. See Fig 11 A blown fuse on the main control board. See fig 1, 2 & 3.
Resistance to earth minimum 20 Meg Ω 5: On cooling mode, compressor and outside fans stop. Unit ceases to cool but display temp. drops to a low figure. Maybe less than 10C. This is typical of an inside coil icing up. The thermistor detects that the coil is at or below zero and turns off the compressor until temp. rises to 12C, Whereupon the compressor will restart. This situation is usually associated with the unit running for a prolonged period on low fan speed particularly in high humidity conditions.
with silicone. Please Note: If water “pools” around the airconditioner (ie. The roof has sagged around the airconditioner) then the caravan manufacturer should be consulted. 4: In high humidity areas, condensation may occur on the underside of the evaporator tray above the inside plenum. See fig 10 and 24. This usually is associated with running the unit on low speed for a prolonged period.
Recharging in the field: If the unit has the following deficiencies in cooling mode: Assuming outside temp. is close to 35C and inside 27C 1: The difference in temp. between the inside return air and the discharge air is less than 14C. (inside fan on Hi ) 2: The inside coil temp (as measured with thermistor (see pp 1&2) is more than 14C 3: The suction pressure (measured at access valve see figs 12) is less than 400 Kpa, then it is indicative of a lack of refrigerant charge.
SPECIFICATIONS Electrical rating: Nom. Cooling capacity Nom. Heating capacity Max rated current cooling Max rated current heating L/R Amps Inside air delivery Installed weight 240V 50Hz 3.2KW 3.2KW 5.4Amps 5.6Amps 20Amps 140 l/s 49Kg Overall height 220mm Overall width 825mm Overall length 1040mm Inside plenum height Inside plenum width Inside plenum length Plenum weight 65mm 535mm 555mm. 2.
Table 1 Thermistor temperature / resistance relationship Actual temperature °C Resistance in K Ω -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 45 43 41 39 37 36 34 32 31 30 28 27 26 25 24 23 22 21 20 19 18 17.5 17 16 15.5 15 14.3 13.7 13 12.6 12.2 11.7 11.2 10.8 10.4 10 9.6 9.2 8.9 8.6 8.3 8 7.7 7.4 7.
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 6.8 6.6 6.4 6.1 5.9 5.7 5.5 5.3 5.2 5 4.8 4.6 4.5 4.4 4.2 4.1 3.9 3.8 3.7 3.6 3.5 3.3 3.25 3.1 3 2.9 2.8 2.75 2.7 2.6 2.5 2.45 2.4 2.3 Example: The thermistor sensor is in free air and the free air temp. is measured as 35C. The resistance of the thermistor assy. is measured at 6.8KΩ This indicates the thermistor assy is OK The thermistor assy in free air is 20 C. The resistance is measured as 6.
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Diag 1 Page 37
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INDEX A: Access valve Accumulator Air registers Amperage B: Buffer Broken control cable see figs 4b,12,A,B,C,D see fig 4b,13,21 see fig 14 see pp. 9 general specifications see fig 15A & B, fig 21 see pp3 C: Cable control Capacitor Capillary Chassis Coil Ice Up Compressor Condensate Connection block Condenser fan Condenser coil Control cable Controller main Controller speed see fig 1, see pp4, see wiring diags see general speci.
H: Hermetic system Hold down bolts I: J: Inside coil Inverter see fig 21 see fig 10 & 21 see fig 18, 21 see pp 7 K: L: Limber holes see fig 8 M: N: Noise compressor see pp5 (8) see fig 6 O: Display see pp3 P: Power requirements Plenum Plugs Pressure see Speci.
T: Thermistor see pp1,2 see figs 16,18,19 see table 12 U: V: Voltage W: Water ingress Watts in Wiring Diags.
