Installation manual

©2008 McQuay International
6
5 Troubleshooting
● If the followings unit malfunction occurred, please follow the below simple checking step to fix :
Symptom analysis Solution
Indoor temperature is higher (heating) or lower (cooling)
than setting temperature
Re – set up the temperature
Compressor stop and fan work
normally
When heating and defrost mode, indoor unit is just running Wait for 10minutes
Power is not on Check and connect the power
Set up the re-start function Wait or cancel timer On
Units do not work
Fuse broken in main power supply Replace the fuse
Air filter is too dirty Clean or replace the filter
Cooling or heating not enough
or too much
Return air barrier Remove the barrier
Low battery Replace the battery
Remote controller
unreadable
Wrong installation of battery Install properly
Humidity is too high Dehumidify
Condensing water in front panel
Setting temperature is too low Set up the higher indoor temperature
● If user can not fix the problem, please contact wit the local service agent for assistance, meanwhile record the malfunction code by remote
controller and indication light of units self-checking function.
Item
code
Description
Item
code
Description
Item
code
Description
1 E0 System malfunction 26 FB Water pump(indoor drain pump) 49 15 Sensor broken(slaveTH5 mid coil 2#)
2 E1
Sensor broken (TH1 discharge
temp.)
27 FC Indoor&outdoor
communication malfunction
50 16 Sensor broken(slaveTH6 inlet coil 3#)
3 E2 Sensor broken (TH2 inlet coil 1#) 28 FE
Outdoor master and outdoor slave
communication malfunction
51 17 Sensor broken(slaveTH7 mid coil 3#)
4 E3 Sensor broken (TH3 mid coil 1#) 29 FF Fresh air filter clogging 52 18 Sensor broken(slaveTH8 ambient temp.)
5 E4 Sensor broken (TH4 inlet coil 2#) 30 H0 Digital comp overload 53 19 Sensor broken(slaveTH9 outlet coil)
6 E5 Sensor broken (TH5 mid coil 2#) 31 H1 Fixed comp1 overload 54 1A
Sensor broken (slave TH10 subcool
outlet)
7 E6 Sensor broken (TH6 inlet coil 3#) 32 H2 Fixed comp2 overload 55 1B
Sensor broken ( slave TH11 subcool
suction)
8 E7 Sensor broken (TH7 mid coil 3#) 33 H3 Fixed comp3 overload 56 1C Sensor broken(slaveTH12 suction)
9 E8 Sensor broken (TH8 ambient temp.) 34 H4 High pressure too high 57 1F Emergency run(slave)
10 E9 Sensor broken (TH9 outlet coil) 35 H5 Sensor broken, high pressure 58 20 Outdoor storage malfunction(slave)
11 EA Sensor broken (TH10subcool outlet) 36 H6 Discharge temp too high 59 27 Ambient temp exceed the limit(slave)
12 EB
Sensor
broken (TH11subcool
suction)
37 H7 High pressure too low 60 28 Water temp. too high or low (slave)
13 EC Sensor broken (TH12suction) 38 L0 Super heat too low 61 29 Insufficient water flow (slave)
14 EF Emergency run 39 L1 Low pressure too low 62 30 Digital comp overload(slave)
15 F0 Outdoor storage malfunction 40 L2 Sensor broken, low pressure 63 31 Fixed comp1overload(slave)
16 F1 Sensor broken (indoor inlet coil) 41 L3
All indoor units and outdoor units t
communication malfunction
64 32 Fixed comp2 overload(slave)
17 F2 Sensor broken (indoor mid coil) 42 L6
Outdoor unit and elec.
power dist.
communication malfunction
65 33
Fixed comp3 overload(slave)
18 F3 Sensor broken (indoor outlet coil) 43 L7
Ammeter and elec. power dist.
communication malfunction
66 34 High pressure too high(slave)
19 F4 Sensor broken (indoor return air )
The following for the Slave units
67 35
Sensor broken, high pressure(slave)
20 F5 Sensor broken (indoor supply air) 44 10 System malfunction 68 36 Discharge temp too high(slave)
21 F6
Indoor and controller
communication malfunction
45 11 Sensor broken
(slaveTH1 discharge temp.)
69 37 High pressure too low(slave)
22 F7 Ambient temp exceed the limit 46 12 Sensor broken(slaveTH2 inlet coil 1#) 70 40 Super heat too low(slave)
23 F8 Water temp. too high or low 47 13 Sensor broken(slaveTH3 mid coil 1#) 71 41 Low pressure too low(slave)
24 F9 Insufficient water flow 48 14 Sensor broken(slaveTH4 inlet coil 2#) 72 42 Sensor broken, low pressure(slave)
25 FA Controller storage malfunction
Indication light twinkle related to the code of malfunction:
Type Heat Sleep/Fan Dry Type Heat Sleep/Fan Dry Type Heat Sleep/Fan Dry
Sensor , indoor Off Off F Sensor, outdoor Off F F
Pressure sensor,
outdoor
F F On
Pump , indoor Off F Off Overload , compressor F F Off System failure F F F
Communication F Off Off Pressure high/low F Off F Others F On On
Note : “ F” means “ flash” , “ On” means “ light on” , “ Off” means “ light off”